half moon eaten out of lifters???

[cranknut67]

I pulled the lifters out of my truck, because it was acting funny and now they are worn out, chewed out and some of the lobes on the cam are rounded... - I just installed a new cam like 4 months ago what the hell happened?

the latest items I have installed were roller rockers, new heads, guide plates, screw in studs, new pushrods, and the smaller 144 B&M blower.

any ideas guys?

[68cajun]

I had the same thing happen once and the manufacturer told me it was due to improper breakin. Said i ran the engine to hard to quickly.

[cranknut67]

could it have anything to do with the blower I just installed???

[Stocker]

Hate to ask, but did you install new lifters with the new cam? And which lifters got worn? 4 mo. is an awfully fast time to wear like that, but at least in the late sixties, there was an oiling problem to the front of the cam. I had one flat-spot the front lobes on a 68 327 Camaro.

[68cajun]

what brand name cam was it? I have had problems with crane. I now use erson.

[Cat Fuzz]

If you pulled the lifters and didn't put them back exactly where they came from, they will destroy themselves and take the cam with 'em.

[67Fleetsidedream]

Improper break and using the old lifters are the main causes for lifter failure. Rule of thumb: new lifters with new cam. Did you use cam lube when you put it together? I have seen guys use regular motor oil for break in lube and there cams fail.
I hope you get it fixed.

[cranknut67]

I used a crane 272 kit with brand new lifters and used the lube included. I think it was because the rockers might have been out of adjustment.. I have had a bad time with crane lifters seizing before so now I used a comp cam extreme energy 268h and the blower seems to like this one alot better.

[jef5150]

, and the smaller 144 B&M blower.

,,,,was your cam ground for blower application,,,,,,,,,they make them for just that reason,,,,,,,,,,jeff

[Primed67]

Originally posted by cranknut67
I used a crane 272 kit with brand new lifters and used the lube included. I think it was because the rockers might have been out of adjustment.. I have had a bad time with crane lifters seizing before so now I used a comp cam extreme energy 268h and the blower seems to like this one alot better.

I have used two of the crane 272 kits and never had luck with them. I had the motors professionally built and the cams went falt within a month. Luckily Crane warrantied the cam after threatening a law suit. The second cam lasted a little longer. I think they said they had a problem with the mold at that time. I'm running a comp xtreme energy 294 in a different motor and love it. It has been the best cam I have ever ran.

Your cam might have gone flat because the valves were not set correctly.

[Randy70C-10]

Originally posted by cranknut67
I used a comp cam extreme energy 268h and the blower seems to like this one alot better.

That's the same cam that I run with my 6:71 blower. I wore a couple of lobes on mine once, don't know why. I adjust all rockers and break in all cams the same way. I also soak lifters in a can of oil before installing.