bad valves

[newjdmdriver]

How can you tell when your valves are bad?

[wed3k]

give me a picture?

check if there is excessive wear on the stem, tip or if the valve head is not round (usually mean you burnt a valve is a chunk is missing)

everything should be smooth and no nicks or excessivly deep scratches.

then with a dial caliper or micrometer you can check valve stem thickness, the margin and finally overall valve length

[quickangel93]

compression test

[ex_style90]

I had bad valves once, and there was alot of loud squeaking for about 15 seconds after I started the car, that could be a sign.