Mechanics

LIFTERS CHARTERING

1996 Buick Regal • 191,000 miles

3500-4000 Miles on rebuilt engine, oil light works but don't come on when running. I had the engine apart foe 9 months and forgot what way the lifters came out so I put them in with the oil hole to the front of the engine or to the oil pump. The engine ran fine after I got some sensor issues fixed. Is it possible that the lifters need to go the other way and they just didn't get sufficient oil flow and finally collapsed?
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Firemnted
July 8, 2012.



There's a large groove all the way around the middle for oil to come in. If there was no oil getting to them, they never would have pumped up and it would sound like a typewriter ready to fly apart.

Also, the lobes on the camshaft are tapered to one side to make the lifters rotate while in operation. That prevents a wear spot from forming on the rubbing surface. What IS important is you must reinstall the lifters back on the lobes they were on before because they will have matched wear patterns. Switching lifter locations can lead to excessive wear of the bottom of the lifter and the cam lobe.

Caradiodoc
Jul 8, 2012.
This is a 3.8L and they are roller lifters and the didn't have a grove around them just a notch at the oil hole!

Tiny
Firemnted
Jul 8, 2012.
Low oil? Timing to advanced?

Cadieman
Jul 8, 2012.
Oil is full and the timing is computer controlled! I did change the oil filter about 300 Miles ago! Could the check valve be stuck?

Tiny
Firemnted
Jul 8, 2012.
What should the oil pressure be? I have 70-75

Tiny
Firemnted
Jul 9, 2012.