WJ Grand Compression Readings - JeepForum.com
 
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post #1 of 2 Old 05-07-2012, 01:42 AM Thread Starter
derekmines
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2004 WJ 
 
Join Date: Jan 2012
Location: Dubai
Posts: 19
WJ Grand Compression Readings

Hi all.

Have just had a potential GC purchase evaluated by my local garage and as part of this they did a compression test.

The car's a 2004 Overland with the 4.7 HO engine with 75k miles approx

all cylinders reported 170 apart from number 4 which reported 145
test was done with engine thoroughly warmed.

What does this mean, am I looking at a new motor, a full top end rebuild or is it fine to leave as-is for a while?

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post #2 of 2 Old 05-07-2012, 03:32 AM
slick1474
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2002 WJ 
 
Join Date: Oct 2009
Location: South Africa
Posts: 61
Unless your getting this for a give away price I wouldn't take on a car with uneven compression like that, some work, being valves, or worse rings/bore work could be needed....
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