Getting some blue smoke on start up in morning. Usually starts right up, but this cold morning it refused to start, after alot of coughing, banging, etc. it finally started, had to keep the key in the start position (rpms up and down for a minute). Tried changing out the pcv but couldn't get the darn thing out. Does it screw in or just push/pull? Didn't want to put pliers to it since I didn't have a grommet. Timing belt changed at 60k, has about 95k now. Thanks for any help
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Don't worry about the smoke when your car starts it will mostly happen in cold mornings but as car heats up it should be gone its just cause the car has to heat up to a certain tempeture. Hope it helps.
If white, some such vapor is normal on a cold start, but lots and lots indicated a water leak into the inlet manifold or a cylinder, probably a gasket leak. If a head gasket leak, this would cause quick overheating.
If blue,this is oil smoke from worn piston rings or worn valve stem seals. Oil can also get into the inlet manifold via a faulty PCV valve. A compression check will tell you more.
If sooty black, this is over-rich fuel mixture, and may be due to a number of things, such as a faulty temperature sender, a faulty fuel pressure regulator, or a stuck-open injector.
is it a diesel or gas engine?
Usually excessive blue smoke on start up indicates oil is getting into the combustion chamber. It could be piston rings or valve seals.
Quick check, drive it within operating range and speed. Either use the rear view mirror or get someone to drive it and you follow in another vehicle. Accelerate, then take your foot of the accelerator. Blue smoke under acceleration indicates piston rings / pistons. Blue smoke on deceleration or the "over-run" indicates worn valve guides / seals.
White smoke can indicate coolant in the combustion chambers / leaking cyl head gskt, or incorrect fueling. If brake fluid gets into the combustion chamber it will generate a lot of white smoke from the exhaust. However, that would entail a leaking brake master cyl and a leaking brake booster.
I would not bother. Usually this is valve guides/seals wearing out, but if that is the only problem, I would not worry about it. When it sits, the oil in the rocker arm area is leaking down into the cylinders, then when you start it, it burns off. I would not do anything until you start using a fair bit of oil, or something breaks.
Blue smoke usually means your buring oil. I recommend bringing the vehicle to a repair shop and have them determine whether the problem is engine mechanical ,Defective PCV valve, or an over oil filled engine or transmission.
Well does it do it when you first start up then goes away? or does it always burn blue smoke? if it does it just when you start it it means you have the possability of having bad valve guide seals, or a bad PCV valve, you can check theat by removing it from the hose and shaking it back and forth it it rattles it may be ok but is cheep enought to fix, also look inside the air cleaner and see if the crank case ventalator is dirty, next would be a top engine clean with GM's Top engine cleaner and to do that I would have to tell you excatly what to do, that costs about 12 dollars but with the fuel the way it is today you could have sticking rings and once it warms up the loosen up and seal, so let me know.
If its a 99 4 cyl 2.4 ltr it should have a timing chain. Check your PCV (positive Crankcase Ventilation) Valve. it should rattle when you shake it. sometimes you can clean it with carb cleaner. but for what they cost, just go buy a new one. When they plug up it doesn't let your crankcase breathe and you will start getting oil in your throttle body or carb. Gas engines don't like to run on oil for the combustion process.4 cyl engines dont have a pcv valve just the v6 motor...