My Christmas present came early

Kahuna

Kahuna

Well-known member
This is for all of you that have never seen the result of BAD (off shore) adjustable lifters:

Evidently this one missed the "Hardening Process", destroying my
camshaft

Merry Christmas

Jim
 

Attachments

  • Cam Shaft 004.jpg
    Cam Shaft 004.jpg
    60.5 KB · Views: 376
Judging by the cross hatch still on the cyl walls it did not last long. Definitely not good. Can I ask who the supplier of the lifters was?? Bill
 
Yes, inquiring minds want to know. Please give supplier info.
Sorry for your early present. Coal would have been better.
 
It's a disgrace selling such utter garbage.....please inform us who supplied the parts to save others from this sort of thing.I hope you get recompense and are soon running down the road.

Whatever happened to quality control?
 
The lifters were the most expensive offered by Mac's. No idea who the Mfg was. These were supposed to be the best available.
The engine had 2200 miles on it.
After I find a new cam core to have ground, I'm going to use the stock Ford lifters.
There were no indications of this problem, other than the performance declining rather quickly. That lifter still turns nicely in the bore, no spring coil bind, nothing stopping the valve.
Very disappointing
Jim
 
My Christmas present is on back order some where in Oregon. But no problem, I ordered well in advance of needing it.
 
I had similar results in a SBC recently and was told the thick cam lube that i used for start-up procedure is not enough; you have to add a quart of Zinc-enhanced additive to the oil also. Plus it is necessary to get the engine running 'first try' and up to higher RPM and operating temperature reel quick....Today's oils are flat-tappet cam killers.
 
It appears to me if the cam lube and oil was the problem , all the lobes and tappets would be in bad shape not just the one.
 
If I was you I would try to locate some one locally that has a rockwell hardness tester and confirm if it was hardned or was a lack of Zinc-enhanced additive as stated by denson1932
 
Is this the same cam situation that was written up in the Ev8, if so there was a discussion of an actual hardness test that showed the lifters to be inferior.
 
With the spring pressures flatheads run, the oil used/not used just can't be the issue. As TDO rightfully pointed, they'd all be worn to a nub if that was the problem. That's a lack of hardness, pure and simple.

I wouldn't run that engine without complete disassembly and thorough vatting. I'd stick it to MAC's for the cost involved.
 
The cause of the problem is unknown until I get it to the Machinist who will test the lifter for hardness. The engine was run in using assembly lube and hi zinc content oil. I'm sure it's a faulty lifter

Yes, I loved the cam and am going to have another ground the same It is/was a Potvin 425 Eliminator grind

Jim
 
Ross F-1 said:
With the spring pressures flatheads run, the oil used/not used just can't be the issue. As TDO rightfully pointed, they'd all be worn to a nub if that was the problem. That's a lack of hardness, pure and simple.

I wouldn't run that engine without complete disassembly and thorough vatting. I'd stick it to MAC's for the cost involved.
Click to expand...

This simply isn't true. When camshaft s start to go flat they don't all simultaneously go out .I have been a certified auto tech for 28 years and we used to see this happen all the time in the 80s before roller valve trains were common. The hardening is already gone from both the lifter and the camshaft .a test will not give you any idea why it happened. Either a valve is tight in the guide or there was a lack of lubrication to the failed lobe/lifter or improper break in. There is a low probability the cam was at fault ,although there was a string of this in the 90s .is this a regrind or new core?
 
ross f-1 said:
with the spring pressures flatheads run, the oil used/not used just can't be the issue. As tdo rightfully pointed, they'd all be worn to a nub if that was the problem. That's a lack of hardness, pure and simple.

I wouldn't run that engine without complete disassembly and thorough vatting. I'd stick it to mac's for the cost involved.
Click to expand...
bingo!
 
You must log in or register to reply here.
Back
Top