swampdonkey
New member
I'm the process of fixing
I'm the process of fixing my 89 crusader 454. Any help on situation would be appreciated. Here's the scenario.
I was underway in my 34' luhrs when I noticed the stbd exhaust smoking and rpm drop. immediately shut it down. Started diagnostics on engine and found no compression on adjacent cylinders. Figured it was just the head gasket. Pulled the head and head gasket was blown but to my dismay there was a 3/8 hole melted/blown in the center of the piston.
I'm not sure what caused what. The piston melting or the headgasket blowing between cylinders. I want to believe the head gasket blew leaned out the cylinder causing it to run hot an melt the piston. Or was that cylinder running lean from a vacuum leak or something else and it caused the head gasket to blow. To me it looks like the head gasket was blown for a while b/c there was a groove worn between the combustion chamber on the head.
Luckily the cylinder wasn't scored so I'm going to attempt to hone it in the boat and just put a new std. piston in.
I'm having trouble finding the piston though. Does anyone know the part # for a 1989 454 crusader piston. The casting on the piston is 353062 and I have the gm part #. Problem is I cant just go to a Gm dealer and get a piston b/c they told me they have been discontinued.
Any help finding a piston or comments on what went wrong with the engine would be appreciated. The motor only had 600 hours and the rest of the internals looked great.
I'm the process of fixing my 89 crusader 454. Any help on situation would be appreciated. Here's the scenario.
I was underway in my 34' luhrs when I noticed the stbd exhaust smoking and rpm drop. immediately shut it down. Started diagnostics on engine and found no compression on adjacent cylinders. Figured it was just the head gasket. Pulled the head and head gasket was blown but to my dismay there was a 3/8 hole melted/blown in the center of the piston.
I'm not sure what caused what. The piston melting or the headgasket blowing between cylinders. I want to believe the head gasket blew leaned out the cylinder causing it to run hot an melt the piston. Or was that cylinder running lean from a vacuum leak or something else and it caused the head gasket to blow. To me it looks like the head gasket was blown for a while b/c there was a groove worn between the combustion chamber on the head.
Luckily the cylinder wasn't scored so I'm going to attempt to hone it in the boat and just put a new std. piston in.
I'm having trouble finding the piston though. Does anyone know the part # for a 1989 454 crusader piston. The casting on the piston is 353062 and I have the gm part #. Problem is I cant just go to a Gm dealer and get a piston b/c they told me they have been discontinued.
Any help finding a piston or comments on what went wrong with the engine would be appreciated. The motor only had 600 hours and the rest of the internals looked great.