LSx Rocker Arm Failure
Thread Starter
Former Vendor
Joined: Feb 2007
Posts: 2,572
Likes: 1
From: Austin Texas
LSx Rocker Arm Failure
I had a customer come in to the shop last Saturday for a rattling sound from the engine. After further inspection, found that the #4 rocker arm failed. This was a heads/cam C5Z with the stock rocker arms. As part of preventative maintenance, the rocker arm bearing should be replaced.
C5Z Rocker Arm Failure
The stock rocker arms contain 33 bearings on each side and that is a total of 1056 bearings for all rocker arms. In this instance, none were in the head and all have drained to the oil pan. Now, from there, the magnetic drain plug will only capture a few. The other can be floating who knows where. This is cheap insurance and once these fail, they can mess up the valve stem and retainer.
RPT Rocker Arm Rebuild
I have seen occurances were this can trash an engine and have seen it. The rocker has to be replaced since it was destroyed and after the repair, the engine was nice and quiet.
We have the rocker trunion upgrades in stock and offer the core swap, for no down time.
C5Z Rocker Arm Failure
The stock rocker arms contain 33 bearings on each side and that is a total of 1056 bearings for all rocker arms. In this instance, none were in the head and all have drained to the oil pan. Now, from there, the magnetic drain plug will only capture a few. The other can be floating who knows where. This is cheap insurance and once these fail, they can mess up the valve stem and retainer.
RPT Rocker Arm Rebuild
I have seen occurances were this can trash an engine and have seen it. The rocker has to be replaced since it was destroyed and after the repair, the engine was nice and quiet.
We have the rocker trunion upgrades in stock and offer the core swap, for no down time.
Thread Starter
Former Vendor
Joined: Feb 2007
Posts: 2,572
Likes: 1
From: Austin Texas
The OEM rockers are not caged. Thge caps are pressed in and only in place by friction. Not sure id SDPC is offering upgraded rockers. The 2012 Camaro ZL1 has the some rockers GM has been using since 1997.
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