1998 Jeep Grand Cherokee, No compression on #1 Cyl,

1998 JEEP GRAND CHEROKEE
130 MILES
Avatar
BRDSMITH15
  • MEMBER
  • 14 POSTS
No compression on Cyl #1, oil in the sparkplug hole, is this a piston replacement or possibly a problem in the head?
May 7, 2012 at 4:29 AM
Advertisement
Avatar
RASMATAZ
  • ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Could be the valves, rings and cylinder wear-I recommend you get a cylinder leakage test to confirm where its leaking at
May 7, 2012 at 4:31 AM
Avatar
BRDSMITH15
  • MEMBER
  • 14 POSTS
leakdown test?
May 7, 2012 at 4:58 AM
Avatar
MHPAUTOS
  • ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
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.
May 7, 2012 at 6:30 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.