SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: Carreraelite509 on August 29, 2018, 09:42:39 PM

Title: Burnt intake valve question
Post by: Carreraelite509 on August 29, 2018, 09:42:39 PM
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.
Itís a hydraulic roller motor and valves were lashed correctly 
Any one know of another reason the valve could get burnt ?

Thanks for any help

Title: Re: Burnt intake valve question
Post by: Tahiti1971 on August 30, 2018, 07:18:47 AM
What brand of valves were used?


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