92 Chevy Silverado Truck Smokes when Started?

[Chad W]

I have a 1992 Chevy Silverado Pickup Truck with a 5.0 Engine V8 and almost everytime I start it up. It Smokes, then it quits smoking, it doesn't smoke when I am driving down the road.

But I would like to find the problem and fix it. I was thinking it could be a valve problem. But not sure.

If anyone knows what the problem is or could be. I would appreciate it.

Thanks
It's probably the valve seals because it smokes out the tail pipe when started.
I think it is a white colored smoke

 

[Doc]

Sounds like your valve seals are leaking. il leaks past the seals while the vehicle is sitting, and gets into the combustion chamber. Then, when you start it, it burns the oil, causing smoke. But once the engine is running, and gets a little warmer, the seals swell, and stop oil from getting past them.

 

[James E]

only three things it can be oil, gasoline or coolant. probably not coolant but check the level anyway and see if you are regularly losing it. if it is losing oil regularly check oil level when you gas up but make it is the last thing you do before getting back into the truck to startup and drive away, 5 min to 15 min (engine off).15 with engine off and on level is best. last when you shut down your engine your fuel pressure may not be relieved so when you crank up the engine you are getting a full dose of gas or your fuel pressure is being relieved into your intake. can you smell gas when the engine is running or burning oil? you can always take it in to a good auto repair shop and have them diagnose it for you about $75 to $100. if you have the skill and tools buy a repair manuel haynes or chiltons it's way cheaper to do-it-youself. my best guess is this black smoke is gas blueish smoke is oil. white smoke too lean or coolant. also get online to autozone.com sign in it's free then go to the trouble shooting section follow the steps type in the problems and it will give you some probable causes. a good repair manuel has a trouble shooting section in it as well. good luck.

 

[ky509]

Chevys are notorious for their valve guides and seals wearing out. The smoke is the signal they are going bad. It is also possible that the oil return hols in the heads are plugged up with sludge not allowing the oil to return to the crankshaft. The oil then builds up around the valve seals and migrates into the cylinders through worn seals and worn guides.

Not seeing smoke while driving down the road is not un common even if you have rings going bad and smoke was coming out of both tail pipes in small amounts. The air turbulence around your tail pipes breaks up the smoke to where you can`t see it when you are driving.

Bottom line is you do need a qualified mechanic to properly diagnose your problem. It could be as serious as bad rings and valve guides or as simple as a faulty vacuum pod drawing oil into your intake manifold on start up .

 

[Mr. KnowItAll]

Worn valve guides or seals in the head.
There isn't really anything you can do to fix it without taking the heads off and having them repaired at a shop.