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Car Forum / Driving, Maintenance, Tuning / General Car Topics / July 2005Dead Cylinder Question
I have a 8 cylinder 350 (I think GM..it's in a boat) Engine back fires and sputters. Engine does not leak oil that I know of. (or at least not very much)Compression test revealed 0 compression in 1 cylinder and all others were ok. Based off these symptoms, Is it likely that I will have to do work on the engine block or will the problem be likely in the Head (gaskets or other) >I have a 8 cylinder 350 (I think GM..it's in a boat) > >(or at least not very much)Compression test revealed 0 compression in 1 >likely in the Head (gaskets or other) In no particular order: 1. Stuck valve. 2. Broken valve. 3. Hole in piston. Not likely to be head gasket (usually they affect two cylinders, not one). pop the rocker cover off and take a look at the valves, see if they open and close when cranking, its possible one is burnt out, but with zero compression it sounds like you have a major problem there, has this problem been there a while or did something just go bang etc. Steve. > >I have a 8 cylinder 350 (I think GM..it's in a boat) > > [quoted text clipped - 10 lines] > Not likely to be head gasket (usually they affect two cylinders, not > one). Don't V-8 engines require a special high-temperature alloy valve when used in marine applications? > pop the rocker cover off and take a look at the valves, see if they open > and [quoted text clipped - 18 lines] >> Not likely to be head gasket (usually they affect two cylinders, not >> one). >Don't V-8 engines require a special high-temperature alloy valve when used >in marine applications? That assumes that whoever did the engine didn't just drop in a crate engine. >>Don't V-8 engines require a special high-temperature alloy valve when used >>in marine applications? > > That assumes that whoever did the engine didn't just drop in a crate > engine. The type of load on a engine in a boat would burn out standard valves very quickly! The type of load would be like a car climbing a never-ending mountain...constant heavy throttle against a load. Standard valves would never take that kind of heat! |
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