Lazy Lifter

[moose]

Oh wise (and not so wise) Ones.

Daily is a 1998 GMC Z71 with the 5.7 350 engine. 128,000 miles. I experienced the need to reseal the intake. One residual issue I have is a "lazy" lifter. Engine is strong smoke free trouble free otherwise.

I have at least one lifter that will be slow to pump up. There is no consistant pattern to it. It will go a few days where it is quiet right from the first start of the day then other times it will be slow every time. It always eventually pumps up. I have tried oil change and Rislone but still does it. Any other remedies short of replacement?

Right now it is just inconvienent but worry that it may worsen.

Thanks

Tim

[wayne petty]

just curious....   was there any sludge in the motor when you had the intake off?

and have you tried a little marvel mystery oil instead of rislone... to wash the varnish off the lifter internals..



just curious...

[348tripower]

You might try adding SeaFoam also. I have had fairly good results with it.

[papastoyss]

Old mechanics trick: add a quart of diesel fuel & run at a fast idle for 15-20 minutes & change oil. Does a good job on varnish.

[Digger]

We used to put a qt. of ATF in and drive for a couple of days with good results. Don't know if that will work with todays oils.