Smoke from the exhaust at start up means that the valve seals are leaking oil into the cylinder, smoke when you accellerate means that the piston rings are leaking oil.
Testimonial: "Thank you. That's what I was thinking. I was trying to rule out a head gasket."
Smoke from oil is blue in color and if you have head gasket leaks they are white smoke because it is steam.
I forgot to mention that it sometimes smokes behind my engine and smells like burning oil. I changed my valve cover gaskets, but it still smokes time to time. I tend to notice it smoking there after the car has been running for awhile.
The only real test to run would be a cylinder leak down test
Ok Thank you once again for your help.
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SOURCE: 1993 TOYOTA TERCEL 1500cc Valve Seals Replaced now smokes much worse
You either have had the wrong valve seals installed, they are physically missing, or the valves are incorrect (too loose in the guides/stem too thin). The rocker arm seals will not contribute to your issue. If it did not have the oil smoke before you took the head off, the issue is with whatever the machine shop did. Valve seals have to fit TIGHT, or oil will go down the valve stem into the intake.
Take the head back to the machine shop & tell them to fix it. For free.
SOURCE: thick white smoke coming from exhaust
If it looks like a James Bond movie, you have a blown headgasket
SOURCE: thick white smoke coming from exhaust
I would think this will be a blown turbo.
These are fed by a small oil pipe and if the unit overheats (due to wear) - this oil fill feed directly into either the inlet manifold - or the outlet - exhaust.
If it is spilling oil into the hot exhaust - you will get a thick white fog. You can confirm this by placing a clear glass bottle or jar in the exhaust stream - and see if it gets a thick coating of oil on it. If it evaporates - it's water, if not - or feels oily - new turbo or overhaul.
Best get is sortd sooner rather than later - as you may be able to save most of it for an overhaul rather than scrap it if badly worn.
SOURCE: 99 saturn sl1 hard to start if sitting for over an hour
you have leaking fuel injectors they are fouling out plugs.
SOURCE: I have a 2004 Jeep Grand 4.0 inline 6 with 116000
Smoke from that area is likely steam. It's possible that you have some slight seepage from the radiator or one of the hoses up front. At this point, the coolant loss is very slight and you may not see much in the way of dripping but there may be a wet spot on or near whatever is leaking that you can locate after it's been run and shut down for about a half hour.
You can also have a shop do a fluorescent
dye test to locate the problem.
Catching any leak while it's this small can avoid major problems later, so don't ignore it...leaks don't get better, they get worse.
I've noticed lately that many people are reading many of the answers given here and not bothering to note if they were helpful. don't neglect to do that as well!!!!
Good luck
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