Cupped / Dished Lifter Question

JB47 · Apr 22, 2019

wasillashack said: ↑

There is a reason cam grinders have break in procedures, to prevent start up wear in new engines, not following these procedures usually leads premature cam/lifter failure. As Tarry says, all that worn metal circulating through an engine doesn't sit well with me. At the least I would go ahead and get a cam/lifter/timing set with gaskets and hope the "perfect" oil filter system works. Failing that be prepared for a major overhaul, depending on sources for parts and machine work if needed can be any where from $1000 to $3000. We all have other priorities in life and can only answer those questions for ourselves, Good luck!
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I didn't follow cam break in procedure.... because I didn't know better, now after only less than 1000 miles on a complete rebuild they look like this. I know there isn't any guarantees, but what's the thought's on cam, lifter kit replacement, and many frequent oil and filter changes?

70cj5134f · Apr 23, 2019

70cj5134f said: ↑

I'll agree, the right way isn't always possible though.
Seen many a bad sbc from 60s,70s, run years after lobe started letting go.
U gotta remember by the time the lobe let's go, the valve springs are probably weak also.
Once a lobe wears, theirs no way except teardown and vat and flush to get all that crap out.
Change oil and filter, set lash, give it some stp, and drive it. Damage is done, needs complete build anyway, drive it, have fun with it, until complete build is in reach.
I'm sort of in the middle of similar problem, (experiment) with a 455 Pontiac engine, in my 70 amc rebel.
Did a ring,and bearing,and gasket job on it before I fabed it into the rebel.
All stock except for the cam,lifters, and valve springs.
Lunati got some bad offshore lifters, and I got them with my cam kit.
Lifter,and lobe went out bout 10,000 miles? I added atf, 50-50 with oil change,drove round under 3k, couple hours, drained oil, changed filter, when I installed a cheap summit cam kit.
That's benn 2 years ago, bout 15k miles, still running strong. Now during this time I've benn collecting parts for a complete rebuild, but stuff keeps putting it on hold.
It does use a tiny bit of oil, but that's ok, I get to drive it and enjoy it while waiting on build.
I don't think he will hurt anything, that doesn't already need replaced. I would watch oil pressure, if it ever falls below 15psi, I'd park it until build.
Just my 2cents worth?
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As above post it's a gamble, I've had good luck, with my cam and lifter change. I added atf, ran a while, changed oil and filter. Then just change filter add at oil, then filter and oil. I also placed a magnet on outside of filter. Benn driving 2+ years now?

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Cupped / Dished Lifter Question

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Cupped / Dished Lifter Question

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