Leakdown Test on a Cold Engine - Seller Says this is Useless?
10-06-2011, 10:15 AM
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Leakdown Test on a Cold Engine - Seller Says this is Useless?
So I bought a motor off Sonshine Autoparts and had my shop do a leakdown test on this engine.
The results: 88% leakage on cylinders 1 and 2, 55% leak on cylinder 3, 20% leak on cylinder 4.
Obviously this is terrible so the shop advised me to send it back, which I did.
Ultimately, here was Sonshine Autoparts' reply after they received it back. I'm not sure what to make of it, can you guys comment?
The results: 88% leakage on cylinders 1 and 2, 55% leak on cylinder 3, 20% leak on cylinder 4.
Obviously this is terrible so the shop advised me to send it back, which I did.
Ultimately, here was Sonshine Autoparts' reply after they received it back. I'm not sure what to make of it, can you guys comment?
I won't go into a pissing match with your mechanics but after assisting in the diagnostics of this engine,right off the bat my guys questioned a leak down test on a cold engine ,they explained to me that engine cylinders are never perfectly round but oblong to compensate for heat expansion therefore you would never be able to get a properly sealed engine when its cold.
Feel free to contact me for further explanations
Thank you
Don Laniel
dlaniel@sonshineautoparts.com
Feel free to contact me for further explanations
Thank you
Don Laniel
dlaniel@sonshineautoparts.com
10-06-2011, 11:12 AM
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That's exactly what I thought too. This is not my field but common sense tells me that if what he was saying was true it should be reasonably symmetric across the cylinders.
10-06-2011, 01:57 PM
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How long has it been since the motor ran? Could this be the issue on a cold test?
I think they should run the engine and see if there are any issues. It's a swap but simple enough. I'm curious to hear.
I think they should run the engine and see if there are any issues. It's a swap but simple enough. I'm curious to hear.
10-06-2011, 04:37 PM
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Correct about the leakdown being done in operating temparures only, never cold. Also if the numbers were that far off I'm pretty sure you'd have a pretty sure you'd have a pretty bad idle in some sort of way to say the least.
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