'89 roller-cam LA 360 w/Magnum heads - new roller lifters not pumping up

Marcohotrod said
I hear u Kurt, roller lifters with oil holes for THRU PUSHROD OILING TO MAGNUM HEADS. No need to rotate crank or cam whatsoever. passenger side lifter galley gets tons of oil at all times, and the drivers side gets a good amount of oil full time by going down to the #1 main bearing in a passage at the front of the block then up to the driver side galley. If there was a problem up front-such as blockage in the passages feeding the driver side, but U do not have this cuz when U put the "good" lifters in the driver side the flow plenty. I would put the 8 hi flow lifters on the driver side just for the heck of it, and preheat the oil, and spin the pump for more time while pumping the plungers of the 2 weak lifters with pushrods

Do you think the two weak lifters will just stay weak? That's the whole reason I had to tear everything apart in the first place.

Seems as if I could move both of them to Cylinder 8 where flow is (theoretically) greatest, but if they're going to be weak and chatter forever, then I see no point in using them (honestly, if it wasn't for the cost, a nice solid-lifter valvetrain would certainly be the easy way out of this - and I'd rather adjust my valves every 3 months than pull the intake ever again).

thesiren74 said
Any differance between 89'lifters and magnum's?

All parts stores cross reference the same lifter for both engines.

Now, the lifters from the engine had their oil hole pointing at a 90 degree angle to the dogbone, while almost all Magnum lifters point straight up (or down, depending how you look at it).

The orientation of 90 degrees vs. straight up seems to be a non-issue, as oil can still pool around the lifter recess and work its way into the hole regardless of position, and I can get the same exact results if I prime either type of lifter while spinning it 90 degrees to replicate the other (with the dogbone removed, not that you'd ever run them like that!). Should be a video earlier in the thread where I demonstrate just that.

I assume the bleed hole change was done to prevent excessive lifter leak down and clattery starts - can't really see any other advantage to the hole's location change.

-Kurt