SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Aevery757 on July 24, 2017, 02:03:45 AM
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Big block 454 went out a couple days ago ran great except I'm hearing what sounds like clatter not a knock just sounds like noisy valves I can only get the boat to do it when it's under a load ... now I have through transom headers it kinda sounded like the exhaust flappers but I got to thinking u can hear it in the boat can't hear it at and idle can't hear t one the trailer Anyone else have a exhaust leak that sound like pinging valves ? Oil pressure is good 38-40 per the gage ...
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