c4c5specialist
Technical Advisor
Hi there,
Engineering changes for the 04 model year engines are as follows.
First, a timing chain guide is now on all valve train systems. The nylon guide is retained by 2 bolts to the front of the engine.
Revision to the PCV system on the LS1. This now employs the LS6 design valley cover and PCV system.
Now, the piston, pin and connecting rod are all serviced as ONE assembly. There is NO replacement of just a piston.
On the finer point, there have been a number of mechanical specifications and tightening specifications as well.
There are now revised diagnostics for mechanical issues as well.
This should be understood before assuming that 04 models are not changed, other than paint, hood, and shocks.
Allthebest, c4c5
Engineering changes for the 04 model year engines are as follows.
First, a timing chain guide is now on all valve train systems. The nylon guide is retained by 2 bolts to the front of the engine.
Revision to the PCV system on the LS1. This now employs the LS6 design valley cover and PCV system.
Now, the piston, pin and connecting rod are all serviced as ONE assembly. There is NO replacement of just a piston.
On the finer point, there have been a number of mechanical specifications and tightening specifications as well.
There are now revised diagnostics for mechanical issues as well.
This should be understood before assuming that 04 models are not changed, other than paint, hood, and shocks.
Allthebest, c4c5
