[butch_n]

Hey all

I've seen a fair number of reports lately concerning new lifters failing almost instantly. The folks reporting this news are professional shop owners/builders and it appears to be widespread.
You can easily find more information, if you feel the need.
Now might not be a good time to plan an engine rebuild, unless you've got some NOS lifters.

 

[vegeta]

Hard to find non china lifters, and also the oil additives could be part of the issue. When they removed a lot of the zinc, flat tappet cams were having problems on breakin.

 

[butch_n]

I've often wondered if I should be adding zinc additive to the oil. Some people say it is a must for longevity, while others say it is snake oil. Well, I really don't think it is snake oil, but not sure if it is something that really should be used. What is your opinion on this?

 

[rhythmrider]

Are these after market lifters made the slightest bit conical on top so that they spin? I remember the resurfacing shops always doing this for me back in the day.

 

[butch_n]

Here is one of the videos I saw on that problem. It covers the defect very well. They were flat as the earth.
Uncle Tony's Garage.