| Author | Topic |
|---|
Location:
Whyalla
Registered:
June 2004
|
|
bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 10:13
|
 |
Howdy, had my 1JZ mX73 on the road for a couple months now but have had an ongoing problem with the coolant bubbling.
Before we started driving it there was no water flowing through the radiator at all, so that was replaced, car also has a new radiator and cap. When I have to stop at the lights for long periods or drive under heavy load,the temp won't go up at all, it just sits on half way, but by the time I get home,theres water spittin out all over the palce from the over-flow tank, and the water bubbles a fair bit.
Worst case,once my radiator cap was blown off completely, not too sure whether it was on loose of not but it hasnt happended again. And when I was waiting a in a drive-thru for ages, the temp started going up and ended up overheating all the way before I got home. When I got home there was steam coming from the over-flow and coolant pissing out everywhere again 
What does everyone think? I really hope its not a blown head gasket or cracked head Only been driving it for a couple months and only under normal city driving load. I'll be supper p@ssed!! if its a blown head gasket becasue that would mean I was sold a dud engine :@
If it is the head, how much would I be looking at to get it repaired?
|
|
|
I supported Toymods
Location:
Perth, WA
Registered:
May 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 10:18
|
|
|
bleed the cooling sys
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 10:19
|
|
Forgot to add that there doesnt appear to be any oil in the water when it gushes out, but that still doesn't rule out blown head gasket or cracked head
Oh, and the car is an MX73 1985 Cressida with 1JZ twin turbo. I hasn't been drivin hard once as we've just been testing it on the road to irno out lil problems here and there.
|
|
|
Location:
Adelaide
Registered:
May 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 10:29
|
|
bleed the cooling system first. but from what you are describing, it sounds like there is combustion/compression gasses getting into the cooling system. if this is right then your fears are correct. head/ head gasket.
bleed the system, and then ensure the correct coolant level. drive the car and see if the fault reoccurs.
note: you may need to make a bleed bottle. make one out of a coke bottle or something, this will ensure that the water level in the bottle is the highest point. (air will go to the highest point, the bottle) this will ensure the air is fully out of the system.
if still not fixed then you can take it to an auto shop and they can put a special chemical in the coolant to see if any gas is in there.
|
|
|
Location:
Brisbane
Registered:
February 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 10:31
|
|
|
sounds more like pressurisation of cooling system from exh gas (the blowing off of cap) - but did you check and/or replace the thermostat?
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
|
Location:
Rocklea qld
Registered:
February 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 10:47
|
|
|
yes start with jammed thermostat. so replace that. then get your raditor serviced just to make sure its not blocked up etc. if those things fail to be the problem then get a co2 test. most mechanics or radiator shops can do this. its never 100% accurate but will give u a better idea.
|
|
|
I supported Toymods
Location:
Australia
Registered:
November 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 10:49
|
|
Get the radiator cleaned if you haven't.
Mine was only 10% blocked but it was enough to make the car overheat.
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 10:52
|
|
|
I just hope its not the head, I thought the 1JZs were built practically bullerproof lol. Just cant see how it could be a cracked head at worst
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 11:02
|
|
|
How much do head gaskets and heads cost? If they need to be replaced we will be doing the work ourselves
|
|
|
Location:
sunny coast, qld
Registered:
October 2002
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 12:57
|
|
IIRC head gasket was about $140 and the head bolts were $28 each. I didn't go that way as I decided to get a new engine because of the knock I had. That was from Penrith Toyota.
I also had the same thing happen once but I was driving hard. The temp guage said it was normal temp and then got home and there was coolant spitting all over the place! I don't trust those things anymore. I now have the hand controller for the wolf that tells me exactly what temp.
BTW are you using the cressida radiator?
I was going to get my jzx90 chaser radiator flushed out but I was told that the end tanks would crack and I would need new ones. Then said that he can't get new ones  Also said that cressida and chaser were different. Anyone know the truth?
|
|
|
Location:
Melbourne
Registered:
May 2002
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 13:19
|
|
|
OMG 1jz BHG!!!! so far two people!! modern day 7m mooohahahah (sorry mate sucks ya engine is toast
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 13:36
|
|
ummm yeh...cheers for the kind words......haha
Its not as bad as I thought really , even though it is something that shouldnt need doing, compared to the rest of the costs dealt out to get this project finished!!! its not that costly really 
If I just replace the head gasket the engine should still e ok shouldnt it?
Serious? is that how many in total have gone, guess im lucky then What causes head gaskets to go? I can't understand why it would be stuffed
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 13:38
|
|
|
Not using the stock one because the core was stuffed. In the end I got a new one made by Koyo, was cheaper than just replacing the core :S
|
|
|
Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 14:35
|
|
Don't trust the standard temp guage, my brothers fan relay burnt out one day in traffic so the fans never came on & the temp guage didn't budge, we just noticed steam & smelt coolant & pulled over. Coolant was bubbling & spitting out of the o'flow bottle just due to overheating.
We've since installed a cheapish mechanical temp guage & removed the standard temp sensor, & even though the temp guage isn't even hooked up to anything, once you start her up it still moves up to the standard operating range & stays there, no matter how hot or cold the motor gets. It only drops down once the ign. is switched off.
What sort of fan setup do you have?
BTW, my brothers is a 1jz in a MX73 too.
|
|
|
Location:
Perth Western Australia
Registered:
April 2004
|
|
|
Location:
sunny coast, qld
Registered:
October 2002
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 21:45
|
|
| BigWorm wrote on Thu, 14 April 2005 00:35 |
Don't trust the standard temp guage, my brothers fan relay burnt out one day in traffic so the fans never came on & the temp guage didn't budge, we just noticed steam & smelt coolant & pulled over. Coolant was bubbling & spitting out of the o'flow bottle just due to overheating.
We've since installed a cheapish mechanical temp guage & removed the standard temp sensor, & even though the temp guage isn't even hooked up to anything, once you start her up it still moves up to the standard operating range & stays there, no matter how hot or cold the motor gets. It only drops down once the ign. is switched off.
What sort of fan setup do you have?
BTW, my brothers is a 1jz in a MX73 too.
|
Makes me wonder why they even bother having a temp guage!
|
|
|
Location:
Sydney
Registered:
March 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 21:58
|
|
| woofa347 wrote on Wed, 13 April 2005 20:52 |
I just hope its not the head, I thought the 1JZs were built practically bullerproof lol. Just cant see how it could be a cracked head at worst
|
As has been pointed out, check the obvious, thermostat, waterpump, radiator, verifying that the cooling system is bleed correctly.
No water cooled motor is bullet proof if it is run without water.
People seem to forget that alot these import motors come from cars which have had front end bingles where I'm sure in some cases have had damaged radiators and the motor has been allowed to run with the loss of coolant.
That's luck of the draw when buying an import motor, no matter what series of engine, however this exlcudes all 7M's as they had blown headgaskets before they were even assembled at the factory 
[Updated on: Thu, 14 April 2005 01:47]
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 22:39
|
|
I'll defantely be getting a seperate temp gauge now!! haha
At the moment just one 16" thermo, hooked upto go on when the engine got hot, but it never come on at all...so now just going to wire it up to be on all the time
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 22:43
|
|
Havnt checked for any blockages or anything yet actually. I'll get stuck into it tonight after work. Would a blocked radiator really be causing the water to bubble and everything so much?
IF it was a blown head gasket, the water would be bubbling when I get home regardless if it was a trip over to Woolies or a road trip is that right?
|
|
|
Location:
Perth
Registered:
October 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 23:42
|
|
| Quote: |
At the moment just one 16" thermo, hooked upto go on when the engine got hot, but it never come on at all...
|
Ahhhh there is your problem bud, this explains why when you drive it's fine but when idling its not. You still need air going through the radiator when still
|
|
|
Location:
Perth
Registered:
October 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Wed, 13 April 2005 23:43
|
|
|
BTW pressure caps will blow off if they are dodgy, or inncorrect fit if the water boils enough.
|
|
|
Location:
Brisbane
Registered:
May 2002
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 01:14
|
|
Have you done a compression test? If there is a low cylinder it might indicate BHG...(a leakdown test would be even more helpful  )
Cheers
Wilbo
|
|
|
Location:
Perth
Registered:
October 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 02:07
|
|
No need to make anymore suggestions he hasnt had a fan to pull air through the radiator, thatyl hurt you.
f0rc3d c0nv3t10n iz your fri3nd!!!!!
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 08:06
|
|
Are you serious?? thats all it could be???
If you speak the truth, you've just made my day 
I'll hook the fan up tonight so that it comes on all the time, and I'll give it a try. That would explain why if I go for a long drive, aslong as I don't stop foor a while, I can get home and the over-flow doesnt even bubble...
Shall see how it goes
BTW, what radiator caps do you suggest? I admit I fell for the "TRD High pressure cap" lol, It didnt even fit on my radiator but what a load of crap hey! I've just got a cheap one that I bought from my loacal Sprints
|
|
|
I supported Toymods
Location:
Australia
Registered:
November 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 08:10
|
|
| woofa347 wrote on Thu, 14 April 2005 16:06 |
I admit I fell for the "TRD High pressure cap" lol, It didnt even fit on my radiator but what a load of crap hey! I've just got a cheap one that I bought from my loacal Sprints
|
A radiator cap must fit 100% perfect.
Also don't use those TRD ones as they are rated for a higher pressure, which your radiator cant probably not withstand.
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 08:15
|
|
The one I've got on there now fits fairly tightly , dont know how it got off in the first place, I probably didn't put it on right.
So if the problem is just that the radiators not getting any airflow, wouldn't there still need to be pressure from somewhere to spit all the water out? Or is that an effect of the radiator not having any airflow?
|
|
|
I supported Toymods
Location:
Australia
Registered:
November 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 08:21
|
|
#1 Water heats up, expands, blows incorrectly fitted radiator cap, covers engine bay in coolant.
#2 Coolant cools down, sucks in air.
#3 Water heats up again, quicker this time, blows steam and coolant everywhere.
Repeat #2, #3 until something gives up.
|
|
|
Location:
Newcastle
Registered:
March 2005
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 11:48
|
|
| woofa347 wrote on Thu, 14 April 2005 18:06 |
Are you serious?? thats all it could be???
If you speak the truth, you've just made my day
I'll hook the fan up tonight so that it comes on all the time, and I'll give it a try. That would explain why if I go for a long drive, aslong as I don't stop foor a while, I can get home and the over-flow doesnt even bubble...
|
yes.. the whole idea of a radiator is for the (relatively) cool air to absorb the heat in the water, which is absorbed from the enigne....
if no air goes through.... no heat gets aborbed (from the water anyhow)
if no heat gets absorbed....... coolants boils
if coolant boils.... it spirts out everywhere
if car moving..... air goes through radiator
if fan spinning.... air goes through radiator
if fan not moving and car not moving....... WARM!!
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 11:52
|
|
ok ok! lol believe it or not, Im not that dumb......
Just didnt realise it could have that much effect, well just thought the temp gauge would go up before it got bad enough to spit coolant everywhere
|
|
|
I supported Toymods
Location:
Australia
Registered:
November 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 13:35
|
|
The stock temp guage sits in the same spot from about 80degC to about 96 degC
Once you go abve 96 it rockets up.
By about 100degC its at the top
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 13:39
|
|
|
I'll have to get a seperate gauge, stock ones are heaps dodgey by the sounds of it!!
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 13:39
|
|
|
cheers for all the help, I'll wire this fan up to be on fulltime then see what happens.
|
|
|
Location:
Perth, WA
Registered:
December 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Thu, 14 April 2005 17:23
|
|
my ta22 guage shows what temp your acually running... it sits at a little bit below 80, showing about 70 or so....
never, ever, ever got higher than that, then again, ive only ever had it on two times after i warmed it up i managed to hit 6k rpm on dodgy timing
hope you sort if out man, car troubles suck teh big 0ne!
Eldar.O.
|
|
|
Location:
Perth
Registered:
October 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Fri, 15 April 2005 00:25
|
|
|
Didn't you wonder why every car has a fan on the radiator? Its not there for show
|
|
|
Location:
Whyalla
Registered:
June 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Sat, 16 April 2005 02:42
|
|
I know what its there for but I had no idea that it wasn't coming on at all.
Originaly we had it setup to come on at a certain temp,but obviously that wasn't working
Its all good now, thanks everyone for there help. Went for a long drive last night with the fan wired to come on all the time,made sure to include lots of stopping and when I got home water wasn't spitting anywhere, just bubbled a tiny bit but that would just be because it has water in there without any coolant, because I wasn't going to put the good Toyota red in just if it wasn't going to be spat out again haha
Cheers again
|
|
|
I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Sat, 16 April 2005 02:54
|
|
allan: stick that in your pipe and smoke it
7m is still t3h cr4p
|
|
|
I supported Toymods
Location:
Australia
Registered:
November 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Sat, 16 April 2005 03:11
|
|
| woofa347 wrote on Sat, 16 April 2005 10:42 |
Went for a long drive last night with the fan wired to come on all the time
|
Make sure this is only very temporary.
Getting working right, coming on when its hot, turning on when it comes back to normal temperature.
My thermo's are on for less than 1% of a drive, 90% of the time they don't ever come on.
The longer its on for, the less time it will last.
|
|
|
Location:
sunny coast, qld
Registered:
October 2002
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Sat, 16 April 2005 05:15
|
|
what temp to do set yours to come on and go off at?
|
|
|
I supported Toymods
Location:
Australia
Registered:
November 2003
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Sat, 16 April 2005 05:24
|
|
On at 95, off at 85.
Since the thermostat is 82degC I think, there is no real point in turning it off much lower than 85.
Take about 2-2.5mins of idling at traffic lights on a warm day to get up to 95degC.
At night time its closer to 5mins.
|
|
|
Location:
Perth Western Australia
Registered:
April 2004
|
|
Re: bubbling and overheating problem on 1JZ!!! :(
|
Sat, 16 April 2005 05:29
|
|
|
bet you its a blocked radiator
|
|
|
