Quote:
Originally Posted by nahvkolaj
Another tool I get to add to my box it seems. Hopefully I’ll run that down this week. Fingers crossed for a head gasket but there was almost nothing on 2 and 4, it sounded like how kicking over a bike with no rings left feels.
Regardless of head issues, is there any reason I should be concerned about the block? Seems the head is what sees the most extreme temps.
This has been an interesting exercise in troubleshooting. I’ve not had to do this on a 4-stroke engine before (let alone a car).
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If like you said, cylinders 2 and 4 have 30, you should have noticed the engine misfiring when you started the car. In your earlier post, I thought you said the engine ran smooth.
I would agree with the other post above, add a tea spoon of oil in cylinders 2 and 4 and check for compression again. I had noticed this in my 330i a few years ago where I did a compression test on a healthy engine and I remember cylinder 1 had 30 psi. I added a spoon of oil to all the cylinders and it helped.