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No compression

Tiny
CHNAPPI52
  • MEMBER
  • 1987 CHRYSLER FIFTH AVENUE
  • 5.2L
  • V8
  • 2WD
  • AUTOMATIC
  • 143,000 MILES
Have minimum compression in most cylinders (110 to 130psi). So why are cylinders six and eight showing no compression? I have good idle and steady vacuum.
Monday, October 8th, 2018 AT 9:07 AM

3 Replies

Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
If six and eight are right next to each other a blown head gasket between the two cylinders could be why there is no compression in each cylinder.
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Monday, October 8th, 2018 AT 10:40 AM
Tiny
CHNAPPI52
  • MEMBER
  • 2 POSTS
I tried the leak down test 0 psi. I used pressure on each cylinder. Is it possible the right bank is weak? I have 0 pressure on 2, 4, 6, 8!
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Monday, October 8th, 2018 AT 2:59 PM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
You have zero compression on 2468?
I think you are doing something wrong with these tests. Impossible that you have a good idle or even a running engine with no compression on 2468.
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Monday, October 8th, 2018 AT 3:44 PM

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