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burning oil?

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Old 12-01-2010, 01:20 PM
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my xj is burning oil fast and smoking what could the problem be?
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Old 12-01-2010, 01:44 PM
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Originally Posted by lost7
my xjis burning oil fast and smoking what could the problem be?
Hi and welcome to CF from Tj... Sounds like the rings are going. Does it smoke all the time or when you start it up for the first time? It could be valve seals if the latter. How many miles on it...Tj
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Old 12-01-2010, 02:20 PM
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A compression test with a gauge on all cylinders wouldn't be a bad idea. Wet/dry best.

The spec. compression for the 4.0 is 120-150 psi, with no more than a 30 psi variation between cylinders.
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Old 12-01-2010, 02:32 PM
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it smokes the whole time. it has 226,000 miles on it without a rebuild
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Old 12-01-2010, 03:10 PM
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Originally Posted by lost7
it smokes the whole time. it has 226,000 miles on it without a rebuild

Then that's prob your rings.
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Old 12-01-2010, 03:13 PM
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rebuild or used motor that dont smoke aint much else
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Old 12-01-2010, 04:43 PM
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A salvage yard or craigslist engine is always an economical plug and play route to go.....

A rebuild or purchasing a remanufactured engine (while nice) is kind of spendy.
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