friend got a problem on D15B
 

what u all thint did a compression check and came up with 195-195-80-195.
he thinks its the rings.
i think valve is bent or valve steem is leaking.
it smokes blue gray preaty bad and its been getting worce.

any one know how to check if a valve is bad.
i am going to pull the head off tomarow so any help will work.

Re: friend got a problem on D15B
 

Leak down tester would pretty much tell you where the problem will be. If you dont have one use the shotgun approach pull the damn head chek the head gasket and then give turn the cam gear while the head is off and go through some rotations and see how the valves looks.