Re: Bendix Treadle Vac Study- Serioius Business!!

Posted by Mike On 2011/6/7 16:24:11

"Using the cam manufacturer's break-in lube does NOT solve this problem. As I understand the situation, the problem is the lack of zinc in today's oils."

Well yes and no.

Wiping a lobe during the first 20 min 2500 rpm break in period (or very shortly after) after a rebuild, that's usually due to not using the correct or any cam assembly lube. Motor oil isn't good enough, you need to use the right stuff. Fred's right there, that stops returning cams 30 days after they were bought. Many manufacturers want you to remove the inner valve spring during the 20 min break in now too. I didn't, i admit it, but my springs were almost stock and the cam was pretty mild.



However, for long term protection, you should continue to use the zinc based oils or an additive so you don't wipe a lobe down the line.

So both are wiped lobes, but you need to do both steps as cheap insurance against failure eventually.

Brad Penn makes excellent oil, and i run comp cams 10-30 motor break in oil in my 71/428 as a regular use oil. It's 4.95 a quart at summit (about an hour from me). I found a guy 3 miles away that carries brad penn so i might migrate to that. I think valvoline VR1 has the zinc in it also? The race oil variant of valvoline maybe? whatever it is.

There are also 100 additives that do the same, but if you can buy it already in there, why pay $12 more for the additive.