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Old 02-12-2013, 05:19 PM   #41
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Having a warm engine does make a bit of a difference. You can re-test if it's going to keep you awake at night.

That said, the numbers you posted aren't the end of the world. The engine in my '90 right now did numbers like that warm, and yet the damn thing just keeps on running. A quart of oil every thousand miles or so and it's happy.
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Old 02-12-2013, 05:52 PM   #42
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Well I tried doing the test again warm and the results were the same. Now the compression tester is stuck though. Something always goes wrong lol
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Old 02-12-2013, 06:08 PM   #43
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You also need to factor in your altitude. You will see lower numbers at high altitude vs. Sea Level. That's why were more concerned about even numbers vs. absolute values.

Also, based on your tester being stuck, you may have had either equipment issues or operator error.

Any indication of coolant in any cylinder?
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Old 02-12-2013, 07:15 PM   #44
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No the piston tops were all carboned up so I dont believe any kind of coolant got in there. No oil present either so maybe I dodged a bullet? The numbers seem low but I am at 4500 feet altitude.
I got the tester out. The threaded part was steel so that going into an aluminum head probably had something to do with it?
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Old 02-12-2013, 07:32 PM   #45
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Cross threading the compression tester will definitely impact your numbers -- you can't get a good seal that way. Always carefully thread steel into aluminum by hand for the first 5 or so threads to avoid this (applies to spark plugs, bolts, etc., etc.).
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