David Neibert
SCCoA Admin
Finally got motivated to pull the motor on my 93 SC today. Big thanks to Chris Wise for coming over to help. Expected to find a bent valve and some damage to the piston on the #4 cylinder where a valve spring dampner broke. It ended up being a lot worse.
The head of the intake valve actually broke off and pretty much destroyed the combustion chamber, the piston and also damaged the cylinder wall slightly. Finally found the head of the #4 intake valve stuck inside the intake manifold in the #5 runner (opposite corner of motor). Turbine wheel also got damaged from smaller pieces of junk coming out of the cylinder. So instead of just fixing the heads and installing a new piston, it's going to need a full rebuild, with a new set of pistons and possibly a new set of heads.
Here are some pictures of the carnage.
The head of the intake valve actually broke off and pretty much destroyed the combustion chamber, the piston and also damaged the cylinder wall slightly. Finally found the head of the #4 intake valve stuck inside the intake manifold in the #5 runner (opposite corner of motor). Turbine wheel also got damaged from smaller pieces of junk coming out of the cylinder. So instead of just fixing the heads and installing a new piston, it's going to need a full rebuild, with a new set of pistons and possibly a new set of heads.
Here are some pictures of the carnage.
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