First cam cam was regrinded and lifters were used stock, no wonder why two lobes went bad especially when car didnt start for ages.
Second was schneider cam with comp cams lifters and after proper brake in, fifth cylinder started to pop.
I opened valve cover and lash cap was dropped and so was pushrod.
Exhaust lobe were 2mm down.

Like my garage neighbour said: Maybe there are reason why Y-Block enthusiasts are so rare.


Hyvinkää, FI

About 12 years ago I got 20 one gallon bottles of Delo400 15-40 from a neighbor and I have been running it in my 223 six in my F100 truck ever since, engine had about 40,000 miles on it and now  has about 70,000 miles using it. So my question is, if it causes problems with the cam what is the difference in a diesel cam? Old diesels would run 200-300,000 miles with no problems..

5/30pennzoil ultra 115612psi before break down
rotela t    (10w30 valvoline nsl 105000 break down
71214 psi at breakdown new retell t 15w40 72022 at break down.
dello 400 5w40 69631 at breakdown
info from speed talk re test info diesel oil and gas engine oil tests

I've read several tests on the break down, I don't recall if the Delo 400 that was tested was the new synthetic or the old conventional. I'm using the old conventional 15-40. I'm not concerned about the lower break down on a stock 223 six, If I had some wild cam and high valve spring pressures I would. I just used the last of the old conventional on my last oil change, so I'll be looking at using something different in the future..

other things that may contribute to cam failure
oil with low breakdown#S
no presure in rocker shafts(90% of rockershafts i have dismant for re use had gauled rocker arms as well as worn shafts. reason is bleed off tubes. ) my take is no bleed off, block them . the oil leakage will work down to dist gear and time chain.
the gaulimg of rocker assembly must be hard on cam and lifters

just read this post man 56roger your a guy after my own heart.could not have said it better.my whole live has been thats not the way everyone else is doing it.get lost.