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Old 20-02-2011, 21:33   #1
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Engine 'Survey' - Anything New ?

Did a search to see if there were any recent discussions or experiences.
Kinda funny to find an '07 Thread I started about doing one in BVI
BVI - Yanmar Engine Mechanic

Never Monday was helpful as ever with advice & suggestion that I followed back then.

Just checking to see if much has changed?
Example - Most Engine shops would NOT give an official survey document but might do a pre-purchase "check" to make sure the engine is OK at the time.

Should a compression test and oil analysis be part of any check?

This time around it's a Yanmar 4JH4E

Thanks in advance
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Old 20-02-2011, 22:08   #2
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Re: Engine "Survey" - Anything New?

Quote:
Originally Posted by Chuteman View Post
Did a search to see if there were any recent discussions or experiences.
Kinda funny to find an '07 Thread I started about doing one in BVI
BVI - Yanmar Engine Mechanic

Never Monday was helpful as ever with advice & suggestion that I followed back then.

Just checking to see if much has changed?
Example - Most Engine shops would NOT give an official survey document but might do a pre-purchase "check" to make sure the engine is OK at the time.

Should a compression test and oil analysis be part of any check?

This time around it's a Yanmar 4JH4E

Thanks in advance
A leak down test will tell you more than a compression test and an oil analysis
won't necessarily tell you how worn the engine is. I wouldn't think any shop would give you an official survey document without having torn the engine down and checked the wear limits.
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Old 23-02-2011, 10:28   #3
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Re: Engine "Survey" - Anything New?

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Originally Posted by perchance View Post
A leak down test will tell you more than a compression test and an oil analysis
won't necessarily tell you how worn the engine is. I wouldn't think any shop would give you an official survey document without having torn the engine down and checked the wear limits.
Thanks for the response & suggestion - will add to the list
Thanks
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Old 23-02-2011, 10:39   #4
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Re: Engine 'Survey' - Anything New ?

Pardon my ignorance, but I thought a leakdown test WAS a compression test.
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Old 23-02-2011, 11:02   #5
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Re: Engine 'Survey' - Anything New ?

LC:
Searched & found this explanation
"They're different. The compression test measures the ability of your engine to develop the presure necessary to light off the injected fuel. The leak-down test is more of a diagnosis to find where any leaks might be occuring (rings, intake or exhaust valves) if you find low compression."
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