Originally Posted by PNHNDLE96CE
Maniac thanks for the help. Turns out it was a bad lifter. Always been a Chevy guy but this sours me alot. Truck has been well taken care of, Mobil 1 oil since first oil change, all routine maintenance performed and at 68K miles a lifter goes bad. Doesn't sound like the "longest lasting trucks on the road" to me. Next truck just might have a blue oval or a yota on it.
I have been seeing that issue with LS engines this year.
Go and Buy 1 quart of Marvel Mystery Oil.
Pour the entire bottle into the Engine crankcase oil.
If you have a safe backroad drive on it and get up to 80- 100 mph WOT.
Let off the gas and let the truck coast down to 20 mph.
Then repeat 1 or 2 more times.
See how the 4.8 LS engine runs afterwards.
Those Ford 5.0 Coyotes are Ok.
China Bullshit trans behind.
I had one apart 2 years ago.
Fried a piston from Super Charger Boost.
Pain in the ass timing the Dual Overhead Cams.
Screw up the procedure and its all over.
Toyota. Fick that shit.