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Cylinder pressure readings

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emmanouilidis

New member
Writing from Greece so please

Writing from Greece so please excuse my English.
Does anybody know the correct cylinder pressure (compression) in psi that i should read measuring my volvo penta 4.3 v6 model 1990?
Values like 160 psi the lowest and 180 psi the higher should worry me?
Thank you all.
 
"With a 10% acceptable differe

"With a 10% acceptable difference, You are on the limit. Did You do the test with full throttle opening?

If 2 cyl next to each other are 'low' it might indicate a leaking gasket between them. Spark plug colors and conditions might tell a bit more if You post a pic."
 
"thank you very much for the f

"thank you very much for the fast responce. i did the test with the carb off place. the cyl with the biggest difference are at opposite sides. i will be back with pics of the spark plugs.
thank you again.
happy.gif
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"Here i am again with the pic

"Here i am again with the pic of the spark plugs.
I have to say that the engine is off the boat since last week and the compression test was carried out with the engine cold. I also have to say that the engine started three or four times the last month and each time only for a few seconds (10-15) because the engine cannot be cooled properly as I have disconnected the salt water supply and the exhaust manifolds.

Thanks in advance...


172137.jpg
spark plugs condition
 
"A bit oily, nut not too bad.

"A bit oily, nut not too bad. guess no big danger around.
Do NOT run engine without water in the block, You will 'hammer' loose a lot of rust in the cooling system!!!!"
 
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