If you got a small mirror and a flash light, you might be able to peek at the underside. worth a shot. don't mean to sound like a smart ass, just trying to help lol. another thing to try is boroscoping the cylinder. its also possible you might have a blown head gasket around that cylinder. just trying to think of all possibilities.

 

You are being nothing but helpful my man!!

Checked today. Retainer does not seem to be cracked. They all seem fine.

Getting a valve adjustment. Too much work for me. lol

Will update! Thanks everyone!!!

 

Do AP2s have similar valve retainer problems?

 

Thread jack!!!!! lol jk.

Idk I am sure someone in here knows. Anyone on AP2 retainers?

 

No Ap2 retainers do not have this problem. They are the standard repair part for the ap1 motors.