compression lost

1997 MAZDA 626
85 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
TIRAS
  • MEMBER
  • 2 POSTS
I had replace head gasket at 1997 Mazda 626 LX 2.0 L. and lost comression for all four cylinders. Timing belt instaled correct. Cylinder head was check for leak and surfased. Coolant pressure test do not show any leak therefore looks lake head gasket seat right. Had good comression before this job. What problem can be?
Mar 25, 2011 at 7:03 AM
Advertisement
Avatar
MMPRINCE4000
  • ✓ASE Certified Mechanic
  • 8,548 POSTS
  • ASE Certified Mechanic
Other than timing, it is gasket installation.
Mar 25, 2011 at 11:20 AM
Avatar
WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
I would question just how hot the engine got from the initial failure. It is possible to have cylinder/piston damage from the heat if it was that extreme. Someone could have installed the head incorrectly and caused valve damage in the process too. I would do a leakdown test to help isolate where that compression is leaking to.
Mar 25, 2011 at 1:33 PM
Avatar
KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Pump some oil into the cylinders to wet the pitons and retry. Overheating cand dry out the rings and the job took some time so the rings could be dry resulting in compression losses.
Mar 25, 2011 at 3:07 PM
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.