Noisy Lifters
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New User
Joined: Apr 2004
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Noisy Lifters
I recently remanufactered my F150 302. I just finished the insall and started it to find a noisy lifter condition. I am using the original lifters and cam as they were still in good condition. I ran the engine for about 5 mins. and heard noise coming from what seemed like the lifter area.
I realize that hydraulic lifters need a bit to build pressure, but it seemed a bit long for this to happen.
The oil pressure is good and the engine gets oil all around, but I am afraid to run the engine for fear of damaging anything internally.
Is there a particular position the lifters need to be in (can they be 180 degress off and not pumping up) Any thoughts.
I realize that hydraulic lifters need a bit to build pressure, but it seemed a bit long for this to happen.
The oil pressure is good and the engine gets oil all around, but I am afraid to run the engine for fear of damaging anything internally.
Is there a particular position the lifters need to be in (can they be 180 degress off and not pumping up) Any thoughts.
Elder User
Joined: Jan 2004
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From: Bobcaygeon Ont.
The lifters actually rotate as they run on the cam so having them out 180 degrees is not possible. Did you put the lifters back in the same holes as they came out of. It is impotant to do this because the lifters and the cam will have a wear pattern. You should also check to make sure your pushrods are snug. If they are loose you may need to replace your cam and lifters or get longer push rods. Good luck.
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These lifters are roller cam lifters so they can only go in two directions. There is a notch that I noticed in the side of each lifter. I'm wondering if those need to go in a particular direction as they are placed in the block.
Any other ideas? I think I might try pulling off the valve covers and the rocker arms and see if I can pump the lifters to see if maybe they are clogged. I thought I cleaned them out pretty good, but you never know. Other than that, I may just try some new lifters if that doesn't work.
Any other ideas? I think I might try pulling off the valve covers and the rocker arms and see if I can pump the lifters to see if maybe they are clogged. I thought I cleaned them out pretty good, but you never know. Other than that, I may just try some new lifters if that doesn't work.
Elder User
Joined: Jan 2004
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From: Bobcaygeon Ont.
Sorry i didn't realize they were rollers. I still don't think it matters which way you install them. Did you pre-prime the engine by turning the oil pump with a drill. Other than that the only thing i can think of is new lifters as you said. I've bled flat tappet lifters in a container full of oil. I put a pushrod in a drill press and worked the plunger up and down until the air stopped coming out. Good luck and sorry i couldn't help more Lance
Logistics Pro
Joined: Jan 2002
Posts: 4,907
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From: suburban atlanta
Pull the rocker covers, and check the adjustment on the lifters. You should see all kinds of oil captured in the low points of the rockers. If they are dry, you have a problem, Houston... You can compress the lifters and measure the clearance if you have non-adjustable studs in the head, i.e. 'rotate to xx ft-lbs' versus 'rotate until you have valve noise, and then tighten X/4 of a turn ...' If you did the valves, you more than likely would have made the valve train 'smaller' in that the valve stem would be raised a little in relation to the tip of the rocker arm. That would point towards less clearance in the train, and thus less chance for lifter noise.
tom
tom
