[steve25]

No problem intermixing the two brands other then what might change with the needed push rod lenght,

[Formulajones]

I mix match brands all the time. Flat tappet Comp or Melling with Johnson flat tappet lifters, and different brand hydraulic rollers with other brand hydraulic roller lifters. There are no real issues with doing that. It's more about buying the quality parts that work.

Like Steve mentioned, other than possibly pushrod length changing for the different brand hydraulic rollers used.

[Schurkey]

Originally Posted by whittp

Car is in the shop for an engine rebuild and transmission swap. Thought the issue was a worn thrust bearing (which it was) but then they found this!

Originally Posted by whittp

BTW, this is the same car that the 200r4 torque converter ballooned and trashed the thrust bearing. It's getting a TKX swap now.

Originally Posted by whittp

Hoping the TKX will solve the issue on the crank getting pushed around (and be a lot more fun to drive).

Why are you changing the transmission?

I ask because you've never mentioned the failure of the trans pump.

If the trans pump isn't trashed, the converter didn't balloon. It might have pushed forward due to excessive fluid pressure in the cooler circuit, though. That could wipe the thrust bearing on the crank, but not damage the trans pump.

Any chance this build had a crappy Eagle thrust face on the crank when it was assembled? They were known for that problem years ago. I'm told that's been taken-care-of since then.

[lust4speed]

Link bar failure is rather rare. Could you post a photo of the other side of the lifter showing the rivet?

[PontiacJim1959]

Originally Posted by Dragncar

Roller bearings are one of the reasons Germany lost WWII. Tanks do not need roller crank bearings, but they had them. Cost,time=lose.

OP, first thing you need to do is cut your oil filter apart and see what you have going on.

Ball bearings - we bombed their ball bearing plants and this was a part of what ended the war, shortage of ball bearings.

[PontiacJim1959]

Originally Posted by lust4speed

Link bar failure is rather rare. Could you post a photo of the other side of the lifter showing the rivet?

What does the pushrod look like? Never used a roller cam/lifters, but would it be possible that the rocker arm had it's polylock loosen up, or was not adjusted correctly, and the pushrod became jammed and bent near bottom - enough to blow out the side of the lifter having the link bat attachment?

[whittp]

I'm not sure about the transmission but the shop said there was a noticeable amount of metal in the pan when it was removed. I'd really like to go with a similar set up since I was happy with the performance of the engine. I'm pretty scared of the bad stories on the Comp 857 lifters though. What are your thoughts on going with this combination?

https://www.crower.com/lifters/lifte...traight-1.html

https://www.compcams.com/xtreme-ener...5-455-cpg.html

They are really expensive compared to the Comp lifters but cheap in comparison to another engine pull.

[MarkS57]

Originally Posted by PontiacJim1959

Ball bearings - we bombed their ball bearing plants and this was a part of what ended the war, shortage of ball bearings.

Yep, Bremen for one. We lost a lot of guys in those daylight bombing raids of that damn city.

The M4 vs the Pershing- lot of differing opinions on that one. One being why in the world did we keep trying to prop up the M4 instead of going all out on getting the Pershing into the war earlier.

Crower still making good stuff. I was able to get my set of Pontiac Sportsman rods at "close out" special in July but it took some time to get them. They are sweet looking for certain and well balanced.

[Lee]

Rough year for HR lifters!

Here is a picture of a friend from Germany's 455 lifter/bore failure.

The engine had JUST been re-re-rebuilt.

After the car was imported, the owner realized the engine was bad. So had it pulled and took it to a shop.

1st build, the builder installed the wrong sized bearings. Motor was toast within a few hundred miles.

2nd build, with a different builder, the valve springs were installed without checking the pressure. Turned out to have just 60-65 pounds at the seat! The lifters were bouncing on the lobes, and pulverized the cam and lifter rollers within ~100 miles.

3rd build, same builder as #2. I suspect the lifter bore was cracked during the 2nd failure, and they just did not catch it. Mild HR from Butler, as were virtually all the parts.

[Scarebird]

Originally Posted by MarkS57

...One being why in the world did we keep trying to prop up the M4 instead of going all out on getting the Pershing into the war earlier...

This may help on that subject:

https://www.youtube.com/watch?v=hQggt4Co54A

[RUDOLFSSON]

Hmmmm

[ponjohn]

Originally Posted by Formulas

I see the STREET roller in a Pontiac as the delicate balarena that may or may not break a toe the next dance while flat tappet is out there break dancing crushing it for years

The thing that drove people from STREET flat tappet was a change in motor oil that's been resolved, And lifter / cam quality
Choose wisely

I have never lost a flat cam prematurely

.

What brand of oil(s) present no issues with HFT?

[Formulas]

There is alot of current oils that do the job Brad Penn, VR-1, Zrod and iam sure there is more along with additives

Iam not doing the research to compile a all inclusive list.

[4dblnkldude]

Threads like this make me nervous. I used Morel lifters with a comp cam, I'll have no one to blame but myself though.

[tom s]

I just used a set of Morels on a comp cam with a 301 block as I was told their oil band worked with the 301.Goes on the pump on the 25,Hope it works out!Tom

[4dblnkldude]

Me too!! No pump for me but will be running in couple weeks!!

[JLMounce]

4dblnkdude. I have Lunati branded Morels on a comp cam. They are noisy as hell, but I have not had any actual reliability issues.

They've been in the car since early 2016 and have between 15,000-20,000 miles on them.

[MarkS57]

Originally Posted by ponjohn

What brand of oil(s) present no issues with HFT?

This is what I've been using lately...

https://www.amazon.com/Driven-Racing.../dp/B01M24GGLQ

[ponjohn]

Originally Posted by Formulas

There is alot of current oils that do the job Brad Penn, VR-1, Zrod and iam sure there is more along with additives

Iam not doing the research to compile a all inclusive list.

Didn't want you to.



I just thought you knew from what you used.

[whittp]

Originally Posted by chuckies76ta

Dam that's a Piss off. Not sure I can say that. but. Sorry for your issues. I've used the 847 lifters in the pass with no issues. I run the Crower solid lifter with the hydraulic cam. No issues to date. All street driven. We have the Johnson hydraulic lifters in another engine and no issues with them either.

Charles

I may end up running the Comp 51-433-11 HR cam with the Crower 66294E lifters. This sounds like the set up you have in one of yours can you give me advise on push rods and valve spring pressure? The shop sounds like they want to go with this set up but I want to double check their work.