Texas Speed Stage 2 L92 Cam Install on a 2013 Denali

13UpInSmoke said:

Just started my Cam upgrade getting rid of the vvt & dod on my 2013 Denali. Went through a local shop in Greenville that will do the tuning as well once I'm done. Using the Texas Speed L92 Stage 2 cam with springs, pushrods, ls7 performance lifters, new timing set, CHE trunnion upgrade, & a DSX flex fuel sensor kit to go from the virtual sensor to a real sensor & run e85. So far I've gotten down to the heads being removed & sent to a local shop to have them gone over & install the spring kit. Hope to have them back in a week then will have more updates to getting the cam swapped in, oil pump changed etc.

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West 1 said:

If your heads are off I would have new Seats pressed into the heads. I have repaired 2 recently where the seat drops and the pistons get hit by a valve. Nor sure why the GM seats drop or how common it actually is but I have fixed 2 myself. One on a 6.2L and one on a 6.0L. When the valve hits the piston the piston usually gets damaged so a very expensive repair. My local shop rebuilt both my 6.2L heads for $700. So not bad expense wise and they are already going to the shop. I have not seen this on the 4.8 or 5.3 engines, maybe they run with less cylinder heat or the smaller heads hold up better?

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13UpInSmoke said:

Couple more pics

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mikeyss said:

This is what took my L9H out, the valve seat cracked in half and fell into the piston. Nothing played nice after that and I ended up with a mangled piston in the oil pan.

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West 1 said:

If your heads are off I would have new Seats pressed into the heads. I have repaired 2 recently where the seat drops and the pistons get hit by a valve. Nor sure why the GM seats drop or how common it actually is but I have fixed 2 myself. One on a 6.2L and one on a 6.0L.

Click to expand...