Poor leakdown numbers....what's your guess?
11-24-2009, 02:34 PM
#1
Racer
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Poor leakdown numbers....what's your guess?
This is a continuation of a previous thread.
PPI on a 1997 993tt in Charlotte showed some strange numbers. PO had had a leakdown performed three years ago ( at Eurowerks ) when he bought the car...all was OK.
Eurowerks gave me the leakdown numbers yesterday:
#1-65%, #2- 56%, #3-0%, #4-0%, #5-5%, #6-0%
Car goes in Nov 30th for a teardown.
Guess the cause.....contest limited to Rennlisters. Prize is knowing you were right!
Adriano
PPI on a 1997 993tt in Charlotte showed some strange numbers. PO had had a leakdown performed three years ago ( at Eurowerks ) when he bought the car...all was OK.
Eurowerks gave me the leakdown numbers yesterday:
#1-65%, #2- 56%, #3-0%, #4-0%, #5-5%, #6-0%
Car goes in Nov 30th for a teardown.
Guess the cause.....contest limited to Rennlisters. Prize is knowing you were right!
Adriano
11-24-2009, 09:42 PM
#7
RL Technical Advisor
Leakdown tests are really useful when the technician takes the time to note WHERE the observed leakage originates from. Without that, the results lack context and are largely useless.
To recap;
Air leakage heard from the air cleaner indicate leaking intake valves
Air leakage heard from the exhaust pipes indicate leaking exhaust valves
Air leakage heard from the oil filler tube indicates a piston and/or ring problem.
I would ask them where it was coming from on each cylinder although it does look like bent valves.....
If so, somebody really missed a shift or accidently used the engine to slow the car down.
To recap;
Air leakage heard from the air cleaner indicate leaking intake valves
Air leakage heard from the exhaust pipes indicate leaking exhaust valves
Air leakage heard from the oil filler tube indicates a piston and/or ring problem.
I would ask them where it was coming from on each cylinder although it does look like bent valves.....
If so, somebody really missed a shift or accidently used the engine to slow the car down.
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11-25-2009, 09:05 AM
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11-25-2009, 08:32 PM
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Racer
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is there an answer to this???
__________________
Dave M
96 993Turbo
http://www.vimeo.com/2625457
Dave, will know Monday when the engine is cracked open.
__________________
Dave M
96 993Turbo
http://www.vimeo.com/2625457
Dave, will know Monday when the engine is cracked open.