quote:thanks but i understand what the problem is
Originally posted by pedaltothemetal: Your valve guides are worn out. When cold the valve guide clearances are so great oil is being sucked into the combustion chamber on the downstroke. Then when your engine heats up the valve guides tighten up and you stop burning oil. Leo
quote:hey, when you say it vibrates, do you mean at idle or when you're accelerating or what? i've got vibrations on both accounts.
Originally posted by Rat407: The smoking is a design flaw that GM has in those 4.3's. It was a defective valve stem seal. Mine started smoking on my 93 Sonoma at 12K warranty replaced the seals and it was fine till I sold it with 128k on it. If Auto Rx stops the smoking on start up then Frank has gotten himself a gold mine for sure. (Even thought I think it is one anyway, RX is the Bomb, that stuff is just way ahead of its time and works like a charm. Thanks Frank!!!!!!!) My dad's 89 GMC S-15 smokes a ton on start up but that is it. Pulled his plugs and they looked great, no build up. So that means that the valve seals are the only problem. He also has the early model 4.3 that vibrates like crazy, before they corrected it with the balance shaft. For the longest time I thought it needed a tune up or the torque converter was going bad in it.
quote:When the only tool you have is a hammer, every problem looks like a nail. [ June 30, 2003, 01:46 PM: Message edited by: CJH ]
Originally posted by sprintman: Needs one or two Auto-Rx cleans (Maybe three if real bad) IMO. Frank will explain what it does for valve stem seals.