Spark plug condition?

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04-23-2020, 09:48 AM

#16

cletus141

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Join Date: Jun 2016

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Model: Cherokee

Quote:

Originally Posted by awg

you are using a lot of oil 1 quart per month...is it leaking?...how many miles per month do you do...mine uses none at all between changes, 210k miles

a compression test will tell you a lot...a leakdown test will refine where the leak is coming from...with that much oil "use" assuming it isnt leaking out, low compression would be indicative of a heavily worn engine

It is leaking. Airbox and probably more. 600-800 miles per month

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04-24-2020, 06:43 AM

#17

awg

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Year: 96

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by cletus141

It is leaking. Airbox and probably more. 600-800 miles per month

I would do a compression test, and if you find general low compression, unless something alarming stands out, you could just replace your spark plugs often, old saying, spark plugs are cheap, engine rebuild isnt.
Gives you time to find a good running engine from another XJ