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Jared L

Jared L 4/1/2010

2002 Jeep Grand Cherokee Overland 8 Cyl 4.7L

Engine

What does it mean if blue-ish, white-ish smoke is coming out the exhaust of my 2002 jeep grand cherokee overland?

The rpm's fluctuate when idle and rpm's go very high when starting jeep. Also, mpg's have gone down about 2 mpg's. Burns a lot of oil but there are no visual leaks. I am forced to add about 1.5 quarts of oil every 3-4 weeks, while going a couple hundred miles in that period.

2 Answers


jondmn

jondmn 4/1/2010

You are burning oil. How its getting there is the question. Could be coming around the rings or through the valve guides. You could also be getting some through your EGR system. I would start with changing out the EGR valve, and the O2 sensor,this will probably take care of the idle and rpm problems. Have someone do a compression check on it.

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jondmn

Jared L 4/1/2010

Thanks. Could some be wrong with the valve stems or head gasket also?

jondmn

jondmn 4/1/2010

The stems or guides could be worn. Compression test can confirm that. Probably not a head gasket though.

jondmn

Jared L 4/1/2010

Thanks

jeepguyracing

jeepguyracing 4/4/2010

What is the coolant level at and is there oil in it?

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