91' Chevy K1500 valve guide seals

[glenn57]

I just bought the truck, and the guy told me the only thing that was wrong with it was the valve guide seals, so i thought alright, no big deal. So, now my problem is, i dont know what size to get, or what are the best kind to get. It's a 91' Chevy k-1500 regular cab, stepside

 

[Joesgarage]

Small Block ? 5/16 valves
Factory uses o ring

 

[lkfldredneck]

You're probably needing umbrella seals since they cover the valve guides. heres a summit link to them. these are what i used on my heads.
http://www.summitracing.com/dom/parts/slp-mv-1888/overview/make/chevrolet
All you gotta do is take the valve springs off, make sure there isnt a burr on the valve, its a good idea to get a fine file and go around the valve a few times. youll need new o-rings too. and then you press them onto the end.

 

[lkfldredneck]

If it burns oil, the valve guides could be shot. or one or two of them. my stock guides when i put a valve in, it literally shook back and forth.

 

[glenn57]

everything on the truck is stock besides the radio i just installed. it dosnt burn oil, but it smokes like crazy when ideling, but in gear, going, its fine

 

[OlSmokie]

First sign that your seal are gone is a puff of blue smoke when you first start it. It should not smoke when idling. If it is "smoking like crazy" at idle, you've got bigger problems than valve seals.

 

[99'Yukon]

everything on the truck is stock besides the radio i just installed. it dosnt burn oil, but it smokes like crazy when ideling, but in gear, going, its fine

Sounds like a case of broken or damaged piston rings if consistantly smoking while running and hot. Bad valve stem seals or o-rings will leak down oil(say overnight after you turn the truck off) and when cranked next will burn off the residual oil gathered inside the cylinder causing a few puffs of blue smoke until burned off like OlSmokie said. Do a compression test on all cylinders and I guarantee you'll find your problem. If you see anything under 100psi things could be getting hairy...

 

[TylerZ281500]

just redo the whole head if you plan on keeping it tbi and port the out of them.

 

[great white]

Sounds like a case of broken or damaged piston rings if consistantly smoking while running and hot. Bad valve stem seals or o-rings will leak down oil(say overnight after you turn the truck off) and when cranked next will burn off the residual oil gathered inside the cylinder causing a few puffs of blue smoke until burned off like OlSmokie said. Do a compression test on all cylinders and I guarantee you'll find your problem. If you see anything under 100psi things could be getting hairy...

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