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Location:
Canberra
Registered:
October 2002
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3SGTE compression - 140-155?
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Mon, 12 September 2005 10:22
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What should teh standard compression on a GenII 3SGTE be? Does anybody know?
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Location:
MACKAY
Registered:
May 2002
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Re: 3SGTE compression - 140-155?
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Mon, 12 September 2005 10:25
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Just did a compression test on mine yesterday , 175 psi .
Trevor
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Location:
Adelaide
Registered:
July 2002
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Re: 3SGTE compression - 140-155?
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Mon, 12 September 2005 11:14
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195 across the board on mine
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Location:
Canberra
Registered:
October 2002
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Re: 3SGTE compression - 140-155?
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Mon, 12 September 2005 11:42
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175? 190?
A nearby mechanic told me it should be near 150? but then, you can never trust mechanics.
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Location:
MACKAY
Registered:
May 2002
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Re: 3SGTE compression - 140-155?
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Mon, 12 September 2005 12:13
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I have gen 3 pistons in mine which are lower compression than the gen 2 so the gen 2 will be higher than my 175 psi .
Trevor
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: 3SGTE compression - 140-155?
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Tue, 13 September 2005 02:05
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Don't worry too much about the absolute numbers unless they are really low.
Just warm it up, remove the efi fuse, hold the throttle wide open and do you test. Then if the results are all close it should be all good. The BGB quotes a variation of 15psi maximum. When I tested mine it was closer to 70 psi difference between number 3 and all the rest, that's not such a good result 
The absolute number you get will be influenced by battery charge, starter condition, obstruction on the intake and exhaust tracts.
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Location:
Canberra
Registered:
October 2002
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Re: 3SGTE compression - 140-155?
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Tue, 13 September 2005 03:36
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Thanks mate, that was a nice answer.
I got
155
155
150
152
But the engine was cold....
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Location:
Canberra
Registered:
October 2002
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Re: 3SGTE compression - 140-155?
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Tue, 13 September 2005 04:32
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See the question stems from a starting problem.
The car sometimes takes a bit of effort to start, but then sometimes it is perfect, it doesn't seem to be directly related to warm or cold starts and that's the compression I'm getting.
What else could this be?
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Location:
Adelaide
Registered:
July 2002
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Re: 3SGTE compression - 140-155?
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Tue, 13 September 2005 06:45
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battery charge?
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Location:
Canberra
Registered:
October 2002
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Re: 3SGTE compression - 140-155?
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Tue, 13 September 2005 08:29
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This problem has outlasted 2 of those!
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: 3SGTE compression - 140-155?
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Tue, 13 September 2005 09:26
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Buggered ISCV?
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Location:
Adelaide
Registered:
July 2002
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Re: 3SGTE compression - 140-155?
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Tue, 13 September 2005 12:37
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bad kharma?
 sorry mate what about checkin all your grounds? make sure theres no lose ones, starter solenoid? starter motor?
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Location:
Canberra
Registered:
October 2002
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Re: 3SGTE compression - 140-155?
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Tue, 13 September 2005 21:48
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Good idea mate, but unfortunately, my backyard expertise doesn't extend that far. I'll be taking it in to my mechanic tomorrow.
At the very least, I know it's not compression, so that's one thing.
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Location:
Parramatta
Registered:
July 2002
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Re: 3SGTE compression - 140-155?
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Wed, 14 September 2005 05:25
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how thick is the gasket you are running have you got a lower comp pistons??? these add up i have only 155 in all cylnders. i know my car runs well still, and quite healthy
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I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: 3SGTE compression - 140-155?
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Thu, 15 September 2005 00:34
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Here's my results GEN 2 3SGTE from ST185
4th cy - 150
3rd cy - 150
2nd cy - 160
1st cy - 125
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Location:
Newcastle
Registered:
June 2004
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Re: 3SGTE compression - 140-155?
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Thu, 15 September 2005 03:13
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Last time mine was done they were 185psi on all cylinders  thats for a gen 2 3S-GTE in my st185
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