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).