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1986 GMC S15 no compression in all cylinders

Tiny
SISSYPOO1
  • MEMBER
  • 1986 GMC S15
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 265,482 MILES
Nocompression in any cylinders after changing lifters and intake manifold gasket cant find any leaks did run before but made lots of noise from lifters so I changed then now no compression no pressure in crank case or cooling system what did I do
Friday, March 12th, 2010 AT 6:46 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi sissypoo1, Welcome to 2carpros and TY for the donation

id you mike the camshaft lobes before you replace the lifters and also adjust the valve lash? If all okay-check the valve timing could be off.

Also I recommend you do a cylinder leakage test-if the readings indicates minimum leakage and shows all low compression -recheck your valve timing could a notch or two off-
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Friday, March 12th, 2010 AT 7:09 PM

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