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Join Date: Mar 2005
Location: Northern CA
Posts: 4,703
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ok to do leakdown cold?
The short version of the question - can I do the leak down test after pulling the engine...will be cold and not warm in that case.
In the process of trying to find the vibration I've been checking the compression. The first time if checked a few days ago, I got numbers like 125-130 with the engine slightly warm and throttle closed. This time doing it again with engine quite warm and throttle open and looking at the gage this time. Getting a lot of 120-125psi. The variation is not too bad. These numbers seem low. I need to find my notebook with the numbers just after top end rebuild and see what I had...I think I remember 150's. Also, I'm now pulling the engine out...can I do a leak down test with the engine cold .... after pulling it out? I hope I don't have something like...all the rings are shot after 7k miles...they are new with cylinders/pistons/rings buffed up by Jerry Woods and Co. The oil looked very clean very little debris on the mag. plugs. Thanks, -Henry Last edited by hcoles; 06-02-2006 at 05:15 AM.. |
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06-01-2006, 07:29 PM
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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What dispalcement and cams? These affect expected values. These values would not strike me as odd on a small displacement, 'S' cammed motor.
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06-02-2006, 08:31 AM
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sorry I didn't give particulars...3.2 stock 1989 motor with 964 grind cams..no other mods, heads and cylinders not fly cut...done with motor fairly warm....in the process of finding/borrowing a leakdown tester...to check things out..
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Sold: 1989 3.2 coupe, 112k miles |
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06-02-2006, 01:24 PM
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Join Date: May 2004
Location: Encinitas (San Diego CA)
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Why are you pulling the motor out?
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1971 RSR - interpretation |
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06-02-2006, 06:50 PM
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Location: Northern CA
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pulling motor out because of vibration...see other thread....harsh noise on deaccel....most noticable at around 2600rpm
motor and tranny is now out... I hope I find something wrong with flywheel/clutch area parts. |
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06-03-2006, 08:08 AM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,079
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I think you will find your numbers are just fine if all about even...trying to decide on "if" high enough (cr) with a gauge might be abstract for a whole lot of reasons like the one above (cam).....static is not what is really happening in there.
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06-04-2006, 02:59 PM
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