| Author | Topic |
|---|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
7MGTE questions
|
Wed, 22 September 2004 03:25
|
 |
Hey all,
Again, since I am new here please excuse my ignorance. Any help would be greatly appreciated. I just put in a 7MGTE into my MA61 and have been driving it the last 2 days.
First question: There seems to be a tapping noise coming from the bottom of the engine (give or take) towards the rear from the cross-member. I've had several mates look at it and 1 reckons it the crank thats floating. But when I put the clutch pedal down, the tapping noise is loud. Occasionally when I let the pedal go, the tapping noise disappears. I am thinking maybe its one of the bearings (ie thrust or spigot). Any help or previous experiences would be great 
Second question: The engine seems to be hesitating (almost like having a handbrake on slightly) when boosting and under load (like when going uphills). There is also some black smoke coming from the exhaust. This only happens when its starting to boost. When boost builds up, it seems to be fine. Thinking maybe its got to do with the timing.
Anyone? Thank you in advance. Any help or criticism is good.
Yian
|
|
|
Location:
On your mum!
Registered:
May 2002
|
|
Re: 7MGTE questions
|
Wed, 22 September 2004 03:32
|
|
I don't think that the tapping is related to the thrust or spigot bearings, as these both only work when the clutch is depressed. Sounds like it may be a big end problem.
Black smoke is most likely the heavy fuelling that Toyota has programmed into the management.
|
|
|
Location:
Canberra
Registered:
September 2003
|
|
Re: 7MGTE questions
|
Wed, 22 September 2004 04:46
|
|
7M`s and there rod knock
Rod knocks are loudest at higher speeds (over 2500 RPM) Feathering the gas pedal may result in a distinctive back rattle between 2500 and 3500 RPMs.
Bad rod knocks may double knock if enough rod bearing material has been worn away allowing the piston to whack the cylinder head in addition to the big end of the connecting rod banging on the crankshaft rod journal. It will sound like a hard metallic knock (rod) with an alternating and somewhat muffled aluminum (piston) klock sound.
|
|
|
Location:
Lost in the K hole
Registered:
May 2002
|
|
Re: 7MGTE questions
|
Wed, 22 September 2004 04:48
|
|
BIG END BEARING
arrghh, caps lock, sorry. though it is kind of relevant 
|
|
|
Location:
Adelaide
Registered:
September 2003
|
|
Re: 7MGTE questions
|
Wed, 22 September 2004 05:11
|
|
Good to hear that you have it going Yian, and back up the other comments that it seems to be a Big End bearing.
Bugger
|
|
|
Location:
tas
Registered:
June 2002
|
|
Re: 7MGTE questions
|
Wed, 22 September 2004 05:20
|
|
Black smoke wouldn't be from toyota's management. They run rich! but not that rich! something is wrong with the Air/Fuel ratio could be from bad AFM, cracks in pipes, boost leak maybe? bad O2 sensor?
sorry to hear about your Rod Knock! that sux!
|
|
|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
Re: 7MGTE questions
|
Wed, 22 September 2004 05:22
|
|
|
d'oh... big end bearing? sounds... hardcore... was going to bring it to mates dyno tmorow to try to tune it, but might now have to put that on hold. we'll see how it goes first... *sigh*
|
|
|
Location:
Castlemaine Vic
Registered:
November 2002
|
|
Re: 7MGTE questions
|
Wed, 22 September 2004 06:53
|
|
|
it also could be the crank pulley loose, try that also...
|
|
|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
Re: 7MGTE questions
|
Wed, 22 September 2004 09:56
|
|
Thanx guys, i'll have a look at the crank pulley tmorow during the day before i do anything too drastic. there are no knocks during acceleration, but then its hard to hear anything over the car anyways. ermm...its mainly during idle that its got the tapping-like noises. once the car takes off, the noise disappears *scratches head*. and yeah, the car hesitates a lot just as the turbo spools, but has no problems when i am giving it a proper stick.
gah... cars... they're worse than computers sometimes.
Yian
|
|
|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 08:37
|
|
Hey guys,
checked everything and everyone is pretty sure the tapping noise is the thrust bearing as the noise is not always there and seems to be coming from the gearbox. Got it dyno'ed and tuned and i'll post up a scanned page of the dyno sheet soon. In a nutshell:
152kW and 559 N.M of torque at the wheels at 10psi.
I gotta say I'm wrapped with that. Money well spent. Now I can start repaying my debts in peace.
Cheers everyone for the input and encouragement.
Yian
|
|
|
I supported Toymods
Location:
Adelaide
Registered:
July 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:03
|
|
sorry am I reading correctly?
550nm of tourque ATW?
If thats correct then thats monstrous!
|
|
|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:07
|
|
|
hehe dude... i questioned it too... but thats what the dyno readout said. i was flipped out. my cheeks still hurt from smiling so much
|
|
|
I supported Toymods
Location:
Perth
Registered:
May 2002
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:13
|
|
|
What gear was it done in? The power will come out close regardless of the gearing, but the torque reading will come out all over the place depending what gear it was done in.
|
|
|
I supported Toymods
Location:
Adelaide
Registered:
July 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:16
|
|
forgive my ignorance here but RWNM is the Same as RWKW, yes?
As in abou 30% less than fly wheel?
Becuase if that is correct then your car has about 195 at the fly for kilowatts and about 715nm of tourque at the flywheel which is very impossible to attain!
My dads mates Blown VY GTS has 800flywheel kilowatts and 1100 nm of tourque, how could your can have 715nm of tourque?
|
|
|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:16
|
|
I hear you. regardless of how much torque it has.. i'm happy with it. Beats the living hell out of the old 5ME. Ermm. I think Sam had it in either 3rd or 4th gear. Not particularly sure which one. what sorta difference would it make?
Yian
|
|
|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:18
|
|
|
LoL dude. Don't get me wrong. I'm not claiming my car is the fastest thing out there. I'm just reiterating whats written on the dyno printout. Thats what it said. I still cant beleive it.
|
|
|
I supported Toymods
Location:
Perth
Registered:
May 2002
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:19
|
|
Hehe, the gearing causes torque multiplication. Doesn't mean shit though, all that matters is the car is fun to drive  Congrats on getting it finished dude
MR 1GGTE, don't bother with the 30% stuff, you can talk to Blake if you want to go down that path.  How do they know it had 800 flywheel kilowatts? Did they strap it to an engine dyno? 
|
|
|
I supported Toymods
Location:
Adelaide
Registered:
July 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:21
|
|
|
they guesstimated it had about 800 flywheel kilowatts, it actually had about 570-580 rwkw on 15psi
|
|
|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:24
|
|
justcallmefrank, the car is definitely fun to drive. Thats all I wanted. I didnt want to make power on the dyno, but my backyard mechanic friend and the dyno dude wanted to see what it could do, so they went for it. I'm happy with the way it is now. All that matters is that it runs so much better than the 5ME, power is definitely much *MUCH* better. I'm still shaking a teeny tiny bit from the adrenaline rush. Plus it didnt help that its been raining around my area. Heh, a lil wheelspin and sideways action always get the adrenaline pumping.
Yian
|
|
|
I supported Toymods
Location:
Perth
Registered:
May 2002
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:29
|
|
|
Good to hear mate, I'm hoping the same from my GA61. Be a big change from the 67kW RA60 A lot of people went on about how I should've done something more powerful than a 1G, but hey, it's gonna have plenty enough power to have a blast in
|
|
|
I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 09:32
|
|
Definitely. In the end, its not what people say. Its what you want to do to your own car. Having done about half the workload on this conversion, the satisfaction I got out of it is just so good. For someone who has never ever worked on cars before, I reckon I did orite
Yian
|
|
|
Location:
Adelaide
Registered:
September 2003
|
|
Re: 7MGTE questions
|
Thu, 23 September 2004 22:01
|
|
Good to hear that you are happy Yian.
When I bought mine, it was supposedly run on a dyno and also had 155 rwkW, but was as an auto and also was on 10psi.
Can wait to drive it with decent suspension and as a 5 speed !!!!
Cheers
Michael B
|
|
|
