1994 Pontiac Grand Prix Compression test failed after adjus

Tiny
DUANE D. DIXON
  • MEMBER
  • 1994 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 11,800 MILES
The adjustment of the push rods and timing cycles are questionable. Which of the two methods is correct. 1st- 18 ft pounds torque or
2nd 18 ft pounds torque & then 90 degrees rotating the crankshaft compression cycly.
Wednesday, February 20th, 2008 AT 12:41 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Bring #1 to firing TDC and line up the marks on the balancer and timing cover. Adjust exhaust valves on 1, 2, 3 by loosening until pushrod is loose, then tighten until there is no lash (you will feel pushrod drag) Then tighten 1 - 1 1/2 turns (I prefer a little looser -1turn) then adjust intake valves on 1, 5, 6.
Turn engine 1 turn, realign marks, adjust the remaining valves. I wouldleave all of tehm real loose so you can see what has and hasnt been adjusted so you dont accidentally forget one. Be advised. The pushrods on this engine are 2 different lengths, exhaust are long and intake are short
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Wednesday, February 20th, 2008 AT 12:49 PM

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