'89 C1500 smoking at startup

[Jeff7076]

Were the Intake Valve Guide seals the only thing replaced? The Exaust Valve Guide seals should have been done too. I had a 305 out of a 79 Monte Carlo w/200,000 miles on it that smoked at start up and if at idle for a traffic light. Fixed it myself for under 50 bucks.

[LT1 Kayker]

I just replaced my PCV valve and my guide seals and it still smokes when I get on it, and you can't gun it from a stop or idle roll without it konking out really bad. It sounds like it dies completely but slowly revs up after it if you let off the gas. I did a compression test on each cylinder and checked my plugs and everything there is almost perfect. Brand new plugs i put in a while ago, and the compression on every cylinder was VERY close to 100/150 wich is perfect almost. Im going to do a vaccume test, but do you guys have any sugestons on why it would bog so bad, and ONLY from a stop or slow speed? Any help here would be awesome thanks.

[Cam7]

Originally Posted by LT1 Kayker

I have an 89 C1500 and it burns oil pretty bad. It leaks on the downpipe right before the gutted cat, and that makes smoke, but whenever I gun it or stay at 70mph on freeway for a while white smoke POURS out of the left exhaust tip...not the right... and if I keep at it smoke starts coming out from the hood and the smoke coming out of the exhaust starts turning black. I stop when that happens so I dunno what happens after that. It runs at about 190 degrees wich isn't too hot or anything, so what would the problem be with "Ole' Whitey" (I named it.)

For one thing you have a oil leak some where could be from the valve covers and for smoke out the left side pull the valve cover off your returns might be pluged up. If not you have a more serious problem valve guides, rings or a simple fix pluged pcv.

[LT1 Kayker]

I know my left valve cover leaks a little, but only because the sidewalls aren't big enough to hold in a gasket, so im sure the gasket I spent a half hour getting in there makes it leak a bit. It leaked oil before that though. I did the compression test and it came out almost perfect, all the plugs are fine, the entire engine has new gaskets on it everywhere (8 months old) and im trying to find a vacuum test thing thats not $60 at checker which is WAY too much. I was thinking of getting this stuff you put in your oil that shows up at night if you shine a black light on it. Like you put it in with your oil, then drive it a bit, then at night you shine a blacklight over your entire engine and it would shine or whatever where it's leaking. I havn't heard anything of it, but it's worth a try.