My Misfire Code Progress
The issue is still unknown but the shop is saying once the head is removed it'll be clear what the issue is.
If the head is the issue, and a valve adjustment didn't fix it, chances are you have worn guides at least and it's causing the valves to rock back and forth and not perfectly seating. The cause is usually valves that were too tight, the valves have two paths to radiate their heat, about 75% of the heat is transferred through the valve face to seat contact and the coolant system on the head, the rest is transferred via the stem to guide. When the valves(especially exhaust valves) don't seat(from having the valve clearance too tight), all the heat loading is taken up by the guides. First your seals get torched and the car starts burning a fair bit of oil, then the guide starts warping, then the valve itself, and the seat starts getting pitted, then finally the valves no longer seal after ovaling the valve seat, leaving the cylinder with low compression.
If the head is the issue, and a valve adjustment didn't fix it, chances are you have worn guides at least and it's causing the valves to rock back and forth and not perfectly seating. The cause is usually valves that were too tight, the valves have two paths to radiate their heat, about 75% of the heat is transferred through the valve face to seat contact and the coolant system on the head, the rest is transferred via the stem to guide. When the valves(especially exhaust valves) don't seat(from having the valve clearance too tight), all the heat loading is taken up by the guides. First your seals get torched and the car starts burning a fair bit of oil, then the guide starts warping, then the valve itself, and the seat starts getting pitted, then finally the valves no longer seal after ovaling the valve seat, leaving the cylinder with low compression.
Light ticking is normal as the guides can have a tiny amount of play and still be in spec. .008" worth of play to be exact. If the ticking gets worse then for sure you have an issue.
Valve clearance should be at least checked every 3 years or 36,000 miles in my opinion.
Valve clearance should be at least checked every 3 years or 36,000 miles in my opinion.








The shop is InlinePro