Well as some my know im trying to get my '71 455 GS back on the road after a very long nap. Turns out i have a lazy lifter between cyc# 1-3. Tried using Mystery oil like some had advice but i thick i'll just replace it. Question is, can i just get 2 lifter or do i need to buy all of them? And if so what brand to get? Not looking to spend to much on this '70 455 as i'm going to send my OG '71 block out to get done and rather spend my money there. Just looking to get the car back on the road so the wife and i can enjoy it again. Thanks.
Lol that's what i have in the cart along with the Intake valley pan and cork valve cover gasket on sale. I'll have this car on the road just in time for the Florida Heat....
Just make sure you break-in the new replacement lifters just as you would if you were breaking in a new cam/lifters.
Why not take the old lifters out, inspect them, take 'em apart ONE AT A TIME and clean 'em up? Shove each one right back onto the same cam lobe it lived on previously. For all practical purposes, hydraulic lifters are tiny oil filters. The inlet hole on the side of the lifter, and the check-valve passage at the bottom are relatively huge compared to the bleed-down clearance. Crud gets in, can't get out again. There's likely to be a bunch of sludge in the bottom of each lifter. As long as the lifter bottom isn't excessively worn, you've saved the cost of new lifters, the ordering process, and--just maybe--you've got better lifters than the new ones. If the lifters you inspect ARE excessively worn, you know to replace the cam and all the lifters.
Use a good break-in oil, start the motor, bring it up to about 2000 rpms for about 15-20 mins, and vary the rpms during that break-in period, but don't let it idle. Keep an eye on temps and check for leaks. There is a thread somewhere on the forum for breaking in a new cam. And what Schurkey said, too. Just make sure the lifters you clean to reuse go back in the same hole they came out of. Whoops. He said that.
Well I had no idea you can take them apart.... I'll take a good look at them since im in there and for less then $10 for two lifter its cheap insurance than going back in a second time. I did pour in some of that Mystery Oil and have been running the engine while doing other things (Power timing) and the tapping noise hasn't gotten any better. Thank for you advise just the same.
The Link above. (rock auto). melling jb 969 Clearly look like Delphi lifters. cant call RA. called both melling and summit. neither can confirm if they are are Delphi lifters. Does anybody got a Idea to confirm if they are Delphi lifters?
Well i removed the valve cover today and check. don't see anything out of the ordinary. Have the new lifter in a can of oil till the weekend. Had the engine running to see if i can pin point which lifter it is, but can't narrow it down. Im sure when i pull them out i should see some wear on one of them. And while im here. some ID# Thanks for all your input.
I'd pull the rocker shaft and look at each pushrod end. Then make sure none are bent. All you need to reinstall the shaft is a torque wrench. 25 ft. lbs. Tighten the 4 shaft to pedestal bolts evenly.
Check the rods, rolled each one on a flat surface. All are straight. Found this on all of the rods. Think i replaced the rods when i had the Heads redone.
