Engine builder probably ordered lifters, that what showed up, threw them in there. Why didn't engine builder run oil pump with drill and verify oiling before intake bolted on is beyond me. All kinds of problems can be caught fixed corrected by checking verifying. But no, its hey lets be dumb and lazy slap it together send it out the door. Engine builder never heard there was a problem so apparently it all worked out for them.
Yeah but what application would they even be used for, restricting little to no oil to the top end?
Yeah doesn't make any sense lifters are not sending or restricting oil flow. On a mopar where they have shaft rockers oiled up through heads makes sense but most other engine oil up through push rods.
The lifters that were in the engine in thier current state cannot allow oil through them and get through the pushrods, there is no possible way they could. I measured how far down in the bore that restrictor disk sits inside the liftet and then, I measured the the pushrod cup. The pushrod cup is actually .003" taller. This means the pushrod is always pushing down on that restrictor disk. I have so many unanswered questions about this like, how did this thing live for 10,000ish miles and, not destroy a single thing? What would be the application of this style lifter? At this point I don't know as if any of the answers to these questions will ever be found. I will be happy to have hopefully figured out the issue and have this thing back on the road.
Got some things to tidy up and a brake to adjust but, that video is coming...lol...STAY TUNED!!!
I primed it up with a drill before I set the valves and then, ran it at about 2500 rpm for 20 minutes to get the lifters spinning and broke in to the cam.
They are different. The new ones have holes in the disk to allow oil to flow out of the inner chamber of the lifter. As far as what exactly happened or, the story of the old lifters, I think there are things in life I'm not supposed to know like, how many licks it takes to get to the center of a Tootsie Pop. I was able to diagnose the lifters as being the issue and get it back to being happy and help an 80 year old family member enjoy his car again and that's ok by me. I have my thoughts on how this happened but, I may never really know for sure. Thanks for following along and, your input.
I like the 68 to 70 GTO. If I was going to buy a GM product it would be a 70 Buick GSX.
Very classy hot rod. I would have to choose between a GSX and a W30 Oldsmobile, and probably a Chevelle SS454, all of which I think are really cool.
Getting ready to drop it off
