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1998 Jeep Grand Cherokee, No compression on #1 Cyl

Tiny
BRDSMITH15
  • MEMBER
  • 1998 JEEP GRAND CHEROKEE
  • 130 MILES
No compression on Cyl #1, oil in the sparkplug hole, is this a piston replacement or possibly a problem in the head?
Monday, May 7th, 2012 AT 4:29 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the valves, rings and cylinder wear-I recommend you get a cylinder leakage test to confirm where its leaking at
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Monday, May 7th, 2012 AT 4:31 AM
Tiny
BRDSMITH15
  • MEMBER
  • 14 POSTS
Leakdown test?
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Monday, May 7th, 2012 AT 4:58 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
You can do a wet compression test, that is add a small amount of oil into the cylinder 1 tea spoon is plenty are re test comps, if comps come up it will be faulty rings, if not valves, the oil will seal the rings for the test so if comp is lost via the rings the comps will come up, the excess oil will burn off when you start he car up again.
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Monday, May 7th, 2012 AT 6:30 AM

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