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Location:
sunny coast, qld
Registered:
October 2002
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1jz low oil pressure
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Sat, 16 April 2005 05:01
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The oil light was coming on in my car so I fitted an electric oil pressure guage. It is getting power to the guage as it jumps to 0 when I switch it on.
I started the car and the guage did not move past 0psi. I have checked oil level and it is full, it uses 10w30 oil (recommended). I then disconnected the turbo oil inlet to see if anything came out but nothing did 
I turned the fuel off and cranked it over as my dad said the oil pump may need to prime itself (get rid of air in system) Did that for a bit and still no oil comes out of the line.
Checked filter and there was oil in there but it didn't seem full. So it could have been the oil that I put into it when I put the filter in.
The sumps have been swapped as this engine is a soarer one so I swapped my front sump onto it. When we did it (a while ago) everything looked how it did in the old engine so...
what is the next step?
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Location:
Melbourne
Registered:
May 2002
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Re: 1jz low oil pressure
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Sat, 16 April 2005 05:28
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firstly pull the front off the engine spin the oil pump drive over by hand see how it feels, then if it still bad yank the engine out rip the sump off.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 16 April 2005 07:12
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I filled it up to make sure it was lubricated and then it slowly pumped the air out and got up to about 30psi on idle. But then when it got to about 78deg water temp it went down again and the oil light came on so I turned it off.
Any ideas as to what would cause this?
We pulled the turbo oil feed line off again and it spurted little bits of oil for about 10 seconds and then stopped?
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Location:
Melbourne
Registered:
May 2002
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Re: 1jz low oil pressure
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Sat, 16 April 2005 07:45
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something is not right with your oil pickup i would say
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sun, 17 April 2005 02:08
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Ok, before I check that, do you think it could be that the oil viscosity is too thin? It just got me thinking that the oil pressure dropped when it warmed up so the oil would be thinner then.
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Location:
Brisbane
Registered:
October 2002
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Re: 1jz low oil pressure
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Sun, 17 April 2005 07:39
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doubt it'd be viscosity pressures, can u remove your sump without removing your xmember
if so, take it off and remove your pickup, if it has a rubber oring that seals it, get a new one and gasket goo it, if its cardboard/cork, get a new one, make sure the pickup mating surfaces are clean and flat and then goo it as well.
have u dared to rev it, does it pick up pressure, if it does then the pump may need to be rebuilt, or the pressure releif valve may be sticking open,
what does the pump run off, an aux shaft or directly off the front of the crank like most mitsu'd
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Location:
Brisbane
Registered:
July 2002
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Re: 1jz low oil pressure
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Sun, 17 April 2005 07:45
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I was just thinking chris... ur old engine died.. ur using everything off ur old engine, so maybe whatever is failing now is what killed ur old engine because of no oil pressure...
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Location:
Sydney
Registered:
March 2003
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Re: 1jz low oil pressure
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Sun, 17 April 2005 07:57
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| Allan wrote on Sat, 16 April 2005 15:28 |
firstly pull the front off the engine spin the oil pump drive over by hand see how it feels, then if it still bad yank the engine out rip the sump off.
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That is not possible on a JZ engine as the oil pump is driven directly off the front of the crank.
Chris - Did you use new O-rings for the block to #1 pan and a new gasket from the #1 pan to the pickup? The gasket is a steel shim type with a rubber overlay, these are definetely single use only gaskets.
Did you swap oil pumps?
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sun, 17 April 2005 10:10
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Well I am thinking that I need new gaskets then as I did reuse the ones I had. Didn't know that I couldn't. When it pumps out oil it is not continuous, like it is sucking air so that would make me believe it could be the gasket in the pickup or near there.
Didn't swap oil pumps.
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Location:
Sydney
Registered:
March 2003
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Re: 1jz low oil pressure
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Sun, 17 April 2005 11:20
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| Chris Davey wrote on Sun, 17 April 2005 20:10 |
Well I am thinking that I need new gaskets then as I did reuse the ones I had. Didn't know that I couldn't. When it pumps out oil it is not continuous, like it is sucking air so that would make me believe it could be the gasket in the pickup or near there.
Didn't swap oil pumps.
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That is your problem. Go in to Toyco and order these > 96721-24031 & 15147-46010, shouldn't cost anymore than $15 and you'll be set.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sun, 17 April 2005 11:27
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you're a legend mate! Will do 
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Mon, 18 April 2005 02:52
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Just ordered them then. Have to wait 2 weeks because there are none in Australia but I don't really care. 2 weeks on top of 2 years isn't a big deal
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Thu, 12 May 2005 14:36
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Just got my gasket and o-ring today.
I pulled the sump off and had a look at it and I still can't really see how any air could be sucked in. I didn't realise that the o-ring is meant to go inbetween the block and the no1 sump. There is no way I can get this oring in there without pulling out the whole engine! The whole no1 sump was siliconed well so I would highly doubt that there would be any leaks there.
I have fitted the new gasket though and will test it out tomorrow. I will also be double checking everything this time. I really hope this is a small thing to fix as I am sick of shit stuffing up all the time. 
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Location:
Brisbane
Registered:
July 2002
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Re: 1jz low oil pressure
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Thu, 12 May 2005 21:14
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hehe good luck man, maybe you should consider giving up modifying cars and start your own rice car project, lots less chance of stickers stuffing up your car performance wise... they might even increase the performance, as we all well know
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Location:
Adelaide
Registered:
June 2002
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 Re: 1jz low oil pressure
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Fri, 13 May 2005 00:09
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STAY FOCUSSED GRASSHOPPER!!!!!
Get that motor out, get that gasket in and get it going.
Perhaps as one last test (before you rip the donk out) pull the cover off the oil pump and check the condition of the impeller, the housing and confirm the drive off the crank or idler is fine.
Don't get discouraged-you'll get it sorted. As I metioned on the phone, the oil system in a motor is very simple and there are only a handful of things that can go wrong.
If you are seeing funny oil pressure-
The pump can be shagged (very very unlikely)
The pump can be pulling air
The engine bearings can be stuffed (but to show zero pressure it would be so shagged you'd hear it a mile away)
Pressure relief valve can be stuffed (also unlikely)
The fact that the turbo feed is spitting air and oil points to the pump pulling air. (to be investigated though of course)
Sean
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Location:
Brisbane
Registered:
October 2002
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Re: 1jz low oil pressure
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Fri, 13 May 2005 06:14
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| MS-75 wrote on Fri, 13 May 2005 10:09 |
STAY FOCUSSED GRASSHOPPER!!!!!
Get that motor out, get that gasket in and get it going.
Perhaps as one last test (before you rip the donk out) pull the cover off the oil pump and check the condition of the impeller, the housing and confirm the drive off the crank or idler is fine.
Don't get discouraged-you'll get it sorted. As I metioned on the phone, the oil system in a motor is very simple and there are only a handful of things that can go wrong.
If you are seeing funny oil pressure-
The pump can be shagged (very very unlikely)
The pump can be pulling air
The engine bearings can be stuffed (but to show zero pressure it would be so shagged you'd hear it a mile away)
Pressure relief valve can be stuffed (also unlikely)
The fact that the turbo feed is spitting air and oil points to the pump pulling air. (to be investigated though of course)
Sean
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yep, thats riiiiiiiiiight
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Fri, 13 May 2005 10:25
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Well, I tested it tonight. Filled up engine and gearbox oil (now have 2 gearbox coolers so took heaps), checked everything was ok and cranked it over. To my extreme enjoyment, the oil pressure went straight to 40psi! I then watched it and it held that pressure well.
After about 1 minute, I turned it off and refilled it as the oil had to pass through the filter etc. Checked the gearbox oil as well and it needed a fair bit also.
Started it up again and waited for it to get up 80deg water temp which is when the thermo is set to come on at the moment and also when the pressure dropped last time. It was holding about 30psi before, and went down to about 20-25psi which I think is usual as the oil thins out.
All this is idling figures, it did go up when I opened the throttle but I have no exhaust at all so I hit 2% TPS and max revs of 1250rpm!
So is 20-25psi on idle ok at operating temp or should I go for a thicker oil? It is currently using 10w30 semi synthetic.
It is about time I had some good luck!!! 
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Location:
Brisbane
Registered:
July 2002
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Re: 1jz low oil pressure
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Fri, 13 May 2005 22:26
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wooo.. its about time
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Location:
Adelaide
Registered:
June 2002
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 Re: 1jz low oil pressure
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Fri, 13 May 2005 23:22
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Get full synthetic oil in there dude and put the issue to bed. (shell helix, mobil 1 or any other FULL synthetic with the right viscosity range)
That pressure is fine, and yep it will drop when the oil heats up.
Tuff.
Now get out there and run a number you girl!
Cheers
Sean
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Location:
Brisbane
Registered:
October 2002
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Re: 1jz low oil pressure
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Fri, 13 May 2005 23:34
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so whats left to get her driving, WBo2, converter, tune
what else
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Location:
Brisbane
Registered:
February 2003
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Re: 1jz low oil pressure
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Fri, 13 May 2005 23:39
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well done chris!
can i make a suggestion? as well as the oil-pressure guage - get a simple sensor that turns on an oil-pressure light (and make the lamp a different colour to the rev limiter) so in the heat of battle (or during staging) you don't have to watch another guage - you just have to remember to shutdown if the XXX coloured light comes on.
btw - are you running an oil cooler? the factory donut cooler or an external job? maybe something with a thermostat in it so your oil doesn't get too hot/thin.
given that the car is primarily a drag-only car, then you might want to consider draining the oil after each track event and warming it up (new uses for plate-warmers?) to evap out fuel condensate somehow.
i remember reading about a hill-climber (who ran a methanol/SC car) who drained the oil after every meeting and gently bbq'd the drum of oil to boil off the fuel that crept past the rings into the oil 
given that yor car will either get hammered or just wait unused for the next track day, the long delays will only allow the petrol to prematurely age/polute the oil.
go mobil1 - even the ute runs it
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Location:
Brisbane
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 14 May 2005 00:00
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maybe something like this, but hook it up to a light
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Oil Pressure Safety Switch 7 P.S.I.
Our Summit oil pressure safety switch shuts down your engine when your oil pressure drops below 7 psi, saving your engine from damage. This switch comes with complete instructions and wiring diagram.
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i'm sure some of the geeks :cough: charles :cough: could hook u up with a system, just run it off a jaycar shiftlight kit
have u got your sump baffled yet, hope so cause that oil will be everywhere under hard accel at the drags
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 14 May 2005 00:52
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Sean: Alright, I will have a go with some full synthetic. Just have to get another 10w30.
Phil: Sort out why brakes are real spongy, fit handbrake cable bracket, off to exhaust shop to get exhaust connected, fit WBo2 and then tune Will be doing converter and auto later, taking it a bit easy for a little while. Also, the sump is baffled from the factory.
Charles: Seems like a good idea, but isn't that what the factory oil pressure light is for? That light is clearly visible. I am not running any gearbox engine oil coolers only 2 for the gearbox. I will see how it goes with some full synthetic and then think about it. But if this pressure is ok, then I will probably leave it.
That's a good idea about the boiling oil Charles! And I can have some sausages on another hot plate
Thanks guys. Can't work on car today as I have too many bloody assignments but it will be going in the near future!
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Location:
Brisbane
Registered:
February 2003
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Re: 1jz low oil pressure
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Sat, 14 May 2005 01:09
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oh... i thought you had replaced the light in favour of a gauge (my bad). 
in that case - bbq away
seriously: you could probably do it by leaving the oil in a metal drum out in the sun with the cap off (and some filter material to exclude flies an shit) - but the bbq option would certainly speed things up - as long as oil stays under 90 degrees (sit drum in big tub of water so there 's no direct heating from the flames) you should be ok - plus the odour wont affect the sausages as much.
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Location:
Brisbane
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 14 May 2005 01:10
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just bleed the brakes first
hope the auto lasts thru the tuning stage, may get killed on the dyno, do u have a auto oil temp guage
maybe u should hook a relay upto the factory oil pressure light and make it light up a bunch of leds so its really noticeable, as u know, a little light like that is the last thing u will be looking at when doing 120mph at the drags
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 14 May 2005 01:29
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Charles: I forgot to mention that the oil pressure guage is in the spare turbo oil inlet spot on the driver's side. So I was thinking that being further from the oil pump may also show lower numbers. But in the end, all I really need to know is "normal" and "less than normal"
Phil: Yeah, I have to bleed the master cylinder as I have only done the brakes not the cylinder. WIll see how it goes then. Tuning will be mainly on the street and only up to second gear! I am hoping it will last also And good point about the LED's, will look into it.
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Location:
Perth
Registered:
October 2003
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Re: 1jz low oil pressure
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Sat, 14 May 2005 05:32
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Chris that oil pressure sounds way too low.
My engines have about 80psi when cold, when revved goes to 100psi.
When warm pressure never gets below 60psi and will go back up to 80psi when the loud pedal is pressed.
Im running a Penrite Synthetic Blend.
Id say you still have something wrong.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 14 May 2005 06:00
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but your oil pressure guage is fitted near that union bolt on the oil pump side right? I would think that this would give differing results compared to mine being on the front turbo inlet.
Here is a quote from another dude on supraforums using the same spot for oil pressure guage as mine.
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When i start my car in the morning, my oil pressure jumps to 60 immediately. The oil pressure will gradually lower as the car heats up and approx. 10-15 of driving my oil pressure at 700rpm is at about 18. If i touch the gas, it immediately jumps to 35-40.
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well.... after driving my car fo about 20 mins on the freeway the car will then idle at about 25psi. Right when i start moving it goes to about 40 and gets to 60 when i boost.
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Also, I have spoken to an engineer on some drag cars and he told me that it should be 7-16psi at idle and go to about 60-70psi on WOT. Don't know where they have their sender units fitted though?
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Location:
Perth
Registered:
October 2003
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Re: 1jz low oil pressure
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Sat, 14 May 2005 06:40
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Yeah no worries Chris, I forgot to take that into consideration.
By the time the oil has reached the turbo the head loss would be quite significant.
So youll be at the drags next week now?
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 14 May 2005 06:45
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You were just trying to give me another heart attack weren't you!
Well next week was the goal but I don't think that will happen because of bloody uni assignments (which I am doing now) and I don't want to rush it. Have to get little things sorted and then I will be there with bells and whistles
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Location:
Brisbane
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 14 May 2005 07:31
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80 sounds high to me skip, my RG was only at approx 40 as well, maybe u have a hi press pump
u should come down earlier chris and come to the drifting with us, its just next door
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz low oil pressure
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Sat, 14 May 2005 11:07
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would like to, but have too many assignments to do Also, will be looking at an ma70 for my GF!
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Location:
Brisbane
Registered:
February 2003
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Re: 1jz low oil pressure
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Sat, 14 May 2005 12:07
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| Chris Davey wrote on Sat, 14 May 2005 21:07 |
... Also, will be looking at an ma70 for my GF!
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you sure your GF wouldn't look even better driving around my old pimpin' MA61?
(see link in sig)
if the MA70 is part of a broader plan to go beyond girlfriendhood (e.g. head towards some kind of seriousness) then perhaps we can talk turkey (or supra's actually)
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Location:
Perth
Registered:
October 2003
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Re: 1jz low oil pressure
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Sun, 15 May 2005 06:58
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| Mr DOHC wrote on Sat, 14 May 2005 15:31 |
80 sounds high to me skip, my RG was only at approx 40 as well, maybe u have a hi press pump
u should come down earlier chris and come to the drifting with us, its just next door
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Both my 1J's have had similar pressure.
As Chris said it's probably to do with the union bolt location, which is right near the outlet of the pump.
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