Question about 2005 Chevrolet Cobalt
If the white smoke comes out when the engine is warm, then you have a head gasket leaking. Give the warm exhaust a smell, if it is a sweet smell then you deffinitly have a head gasket leak. Pull the dip stick out and check to see if there is any foam/ frothing on the dip stick. This will tell you if the coolant is leaking into the oil passages and if it is, do not drive the car. The coolant will wash your rod and main bearings causing the rotating assembly to fail. The proper fix is to replace the head gasket and have the head checked for warpage. Do not use coolant system repair compounds as they will plug your heater core and now you have that to replace also. I hope this helps.
Posted on Apr 10, 2011
It could be a blown head gasket, or intake manifold gasket leaking. give the car a compression test to check the readings on all the cylinders, the 1 with the lowest reading is in the area of the blown head gasket, this will have to be replaced.
Posted on Apr 10, 2011
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Posted on Jan 02, 2017
This is usually an indication of a bad head gasket.I gasket. The white smoke is the coolant leaking out of the engine and winding up in the oil passages, due to a bad head gasket. To confirm this,
1. check oil. Is level increased, or milky appearance?
2. Is coolant level dropping, but u don't see any signs of leaks?
The above indicates a bad head gasket, causing the white smoke u describe. Let me know how u make out.
Posted on Jan 03, 2009
White smoke is caused by coolant or water coming out the tail pipe. There is a chance that the white smoke was caused by water splashing up from a puddle onto the exhaust pipe. Keep an eye on the coolant level in the radiator in any event.
Let us know how it goes or if the problem persists. We're looking forward to how things go for you.
Posted on Jun 16, 2008
Check the fuel pressure regulator. It should have a vacuum line attached to it - disconnect the vacuum line and turn the ignition on - if fuel come out then that's your problem. DON"T do this while the engine is hot or you could start a fire!
Posted on Jan 01, 2009
The most likely cause is a blown head gasket,but it could also be a warped head,was the motor overheated prior to the problem starting? The white smoke is steam,check the underside of the oil fill cap and dipstick for a grayish brown residue,check the coolant for a low level and oil conatamination,either of these conditions verify that a head isn't fully sealed.Unless your moderately skilled mechanically this a job to be done by a shop.A good shop will perform a leakdown test to verify this.
Posted on Jun 01, 2009
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