Roller Lifters
 

Looking for some input here from engine gurus on replacement roller lifters. When replacing roller lifters in a Gen VI motor, what are your preferences? A lot of pretty parts out there, but a lot are imports and do not hold up and contribute to trashed motors. Pulling top end off in the next week or 2 and inspecting lifter, springs etc for wear. I've even heard of bushing rollers, instead of needle bearing and wonder what is preferred or what you are using that holds up.

If your going shopping for lifters, this would be a good Boxing Day read:

https://www.offshoreonly.com/forums/...-update-3.html

Been following that post. It is long and drifted off to fuel ratio and away from the failing lifter, which is where it started. Lifters were part of the chain of events, but I caught that the fuel ratio started the meltdown and then everything else followed suit.

His spring pressures are also way too high for a hydraulic roller.
Imop that had a lot more to do with his lifter failure than other factors.

Are you looking for a tie-bar lifter or dog bone style

I don't know yet. I have not opened up the engines past the valve covers. They are GenVI HP500's.

Johnson has a dog bone replacement lifter. Just by design, I find them more reliable when they fit the application.

if stock those will be dog bone style

Assuming my day does not go to (TIHS) tomorrow like the past several days. I will get the intakes off and take a look. Also working on rear brakes on my 32 Ford Street Rod. Which has also become a major pita.

In all my research if I were to go .842 I`d lower my spring pressures below 200# and go with Johnson lifters , or the isky which uses johnson body.
FYI, I`ve been running 225-235# spring pressures for 9 years. The Morel lifters didn`t care .. ran those for 7 years without an issue, same lifters and still working great when I took em out. Only reason I switched to the XD is because I thought the Morels were tired. The XD`s do not like nor are rated for the spring pressures I put to them.
Current Morel quality is not the same as those from 9 years ago thou.

Well, brake rotors did not fit the axel wheel studs, and I needed a 39/64 bit to enlarge them. So, I opened up the valve cover on one side of each engine. All I see are lifters with a retainer plate in there.

Yeh, i don’t know why gm lifters with dog bone lifters wouldn’t work with hp500 cam. With dog bones/the dogbones retainer , and such of course

msny haves used them with the lsrger crane 731 and 741.

Just throwing this out there.

Thanks for all input. Once I get the intake off and pull the lifters, I will give an update. I have looked at the GM lifters too. I am slow on this because of all the other end of the year stuff going on. Just need to spend the day and night out in the shop to get a couple projects done.

I would put the Chevrolet performance dogbone lifters back in it. I have used them to over .630 lift and 450# with no issues.

Thats what I've been using on my builds with 525 efi cams zero lifter issues.

Dog bone lifters. All looked good with some scuffing wear on the sides of the lifter body, Rollers are clean with no pitting, scratches or wobble. There are no numbers or other id's in the parts. I am assuming they are the original GM lifters. Some, 3-4 had some slight side to side movement on the roller axle, which has prompted me to look at replacing them. Johnson's are my first choice then I see they are about 800/set (16).

I put these in the 2 500 EFI's I built.......OE replacement,

https://www.rockauto.com/en/parts/ac...ve+lifter,5548

I looked at those yesterday. Pretty sure that's what is in there. A word of caution from an engine guy I respect. Lifters are not the same as they were a couple years ago. A lot are junk and who knows where they are made"

https://www.summitracing.com/parts/n...SABEgIkF_D_BwE

This is what I have always used on gen6 engines. There is no reason to deviate from them.

Yup, that’s a kit (

Chevrolet Performance 12371056)

which includes:
This kit includes 16 of P/N 17120061 roller tappet, 8 of P/N 12551397 tappet guides, one of P/N 12551399 tappet guide retainer, and four of P/N 9440224 retainer bolts

Gm#17120961 are delco #HL122

Same lifters Speedy, Sonics, and some others have mentioned.

:) thumbs

What is recommended for a GEN V block? Planning on an inspection of my valve train this winter.

you can say the same thing on some of the tie-bar lifters, rivets snapping off, body failure go that route and it changes all the valve train geometry, different push rods and so on

FWIW
Speedy linked a GM #17120060 Delco H121.
That kit contains GM #17120061 Delco H122.

This note accompanies that kit.
• For single-service replacement lifter, use P/N 17120061
NOTE: These lifters allow more oil to the rocker arms than
the late-model truck roller lifters.

Johnson tie bar lifters