SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Carreraelite509 on August 29, 2018, 09:42:39 PM
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I recently had a fresh valve job and new valves put in my bbc
After about 10 hours of use
I noticed a drop in performance.
I performed a leak down test and found out I had a bad burnt intake valve.
Pulled the head and confirmed the intake valve/seat let gasoline come out when poured in intake.
Jetting is correct
Timing is set at 32 total
Never gets above 150 degrees
And has about 4 psi water pressure at idle.
It’s a hydraulic roller motor and valves were lashed correctly
Any one know of another reason the valve could get burnt ?
Thanks for any help
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What brand of valves were used?
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