5.7 L bad valves/lifters?

My 97 does the same thing, it started around 105000 miles and it has 145000 now, I changed all the bearings and timing chain and it didn't help at all, a mechanic told me it was piston skirt slap and said it won't hurt anything, so I just keep driving it.

A friend of mine just had a similar problem. It was the Cam. Had to be replaced. $3K.

: all the time. Is this a valve/lifter problem or some other sign of : catastrophic failure? : : Thanks for your help :

Try a quart of Rislone in it. Sounds like a sticky lifter.

Al

Try a simple valve lash adjustment. 100,000 miles with out a lash setting especially with hydralic lifters, can cause lose of power and excessive valve train noise. Charles

With wear things losen up. I have seen high rail style heads with the rocker arm retainers so lose, the engine will not start.

Valve lash settings are proper maintaince. Not the 3K mark like older engines, more like the 80k to 100K mark.

Heck some people think they shouldn't change the spark plugs till the engine barely runs if the vehicle is fuel injected. Charles

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HOLY COW... lets see..

Drain & remove oil pan, drain radiator & remove. Remove Valve covers & loosen rocker arms, remove pushrods. Remove water pump & timing chain cover. Take three bolts out of the cam sprocket, and remove timing chain. Three long bolts as a handle, remove cam.... 4X4 is MUCH harder. To get the pan off you would need to:

A.) hoist the motor about 2 to three inches off the motor mounts. or B.) drop the front diff out of the way.

Should only take about a hour to remove the cam otherwise. 2 hours to have it running again.

Tell your friend to dial 1-800-different-shop.com next time.