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exhaust smoke at startup

 
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Old 26 Mar 2011, 01:13 pm
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Default exhaust smoke at startup

Hey, any help appreciated...

I have a 2003 GT Turbo PT Convertible with all the options, with about 94,000miles on it. We just replaced the cam relay switch after a check engine light and now we are getting whitish smoke at startup. No engine lights and no noticeable performance loss. When we start the car after a short while of sitting, a large plume of whitish smoke billows out then goes away and does not come back until the next start. Last oil change we put in high miliage oil.

Anything to worry about? Turbo, head gasket, or valve seals? Thanks again.
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Old 26 Mar 2011, 01:41 pm
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Default Re: exhaust smoke at startup

The first thing I would do is check BOTH hoses that are part of your PCV system. One is the hose that connects your PCV valve to the intake manifold. The other is the "make-up" hose from the end of the cam cover to the air filter box. Also check the PCV valve itself. Since the "make-up" hose is near the cam sensor you replaced recently, you may have damaged the hose, simply knocked it loose or just plain forgot to hook it back up.

Jerry
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Old 26 Mar 2011, 01:52 pm
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Default Re: exhaust smoke at startup

Exhaust coming in through AC upon startup?
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Old 26 Mar 2011, 07:14 pm
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Default Re: exhaust smoke at startup

Quote:
Originally Posted by wwpptc View Post
The first thing I would do is check BOTH hoses that are part of your PCV system. One is the hose that connects your PCV valve to the intake manifold. The other is the "make-up" hose from the end of the cam cover to the air filter box. Also check the PCV valve itself. Since the "make-up" hose is near the cam sensor you replaced recently, you may have damaged the hose, simply knocked it loose or just plain forgot to hook it back up.

Jerry
Thanks Jerry, I will give those a try before going any further, I appreciate it.
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Old 26 Mar 2011, 07:15 pm
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Default Re: exhaust smoke at startup

Thanks Jerry, I will give those a try before going any further, I appreciate it.
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Old 28 Mar 2011, 08:30 am
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Default Re: exhaust smoke at startup

white smoke, if truly white is not smoke but more a steam cloud. This is usually a sign of coolant leaking into the cylinders while the engine is standing.

Are you using or losing coolant with out any noticeable leaks or drips on the ground, if you are topping up even a little on a weekly basis then you are probably looking at a headgasket replacement in the not to distant future.

Grey or black smoke at start up usually indicates valve stem seals or worn piston rings, and is caused by oil burning at start up.
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