06-23-2017, 06:54 AM
Hello all,
I am inquiring about the valve seat contact pattern width spec in the 96 GEO Tracker FSM on page 6A1-32. The spec for both intake and exhaust is 1.1 to 1.3 mm. I had low compression in all cylinders. Ranging from 90 psi to 135 psi. I found leakage out the exhaust valves. I removed the head and the only problem I can find is the valve seat contact width is 1.75 mm on the exhaust valves. The owner I bought the car from 8 years ago said he had a reman head installed. I'm guessing they cut or lapped the valves to wide. Would the 1.75 mm contact width have caused the premature leak by on these valves? Thank you for any advice someone can provide.
I am inquiring about the valve seat contact pattern width spec in the 96 GEO Tracker FSM on page 6A1-32. The spec for both intake and exhaust is 1.1 to 1.3 mm. I had low compression in all cylinders. Ranging from 90 psi to 135 psi. I found leakage out the exhaust valves. I removed the head and the only problem I can find is the valve seat contact width is 1.75 mm on the exhaust valves. The owner I bought the car from 8 years ago said he had a reman head installed. I'm guessing they cut or lapped the valves to wide. Would the 1.75 mm contact width have caused the premature leak by on these valves? Thank you for any advice someone can provide.