The Stovebolt Site Forums The Shop Area Engine Shop 366 big block camshaft

I have '72 C60 with a very tired 366. Oil pressure is good and it doesn't seem to use much oil.
Once I get it warmed up it seems to idle fairly smooth.

Do the cams ever go flat on these engines?

I'm wondering about pulling the heads and re-ringing it in frame. I've never attempted an in frame overhaul before, rebuilt several small blocks on stands.
Any tips, advice?

While the only dealling I've had with the 366 is in a single axle dump truck that I use to drive for a local construction company back in the 80's, yes the camshafts do wear out. Sometimes they don't always get serviced like they should and the loabs do wear out and get flat.Larry

That is what this one is Larry, a single axle dump I use around the farm. It's getting hard to start and is really down on power coming up the hill.
I was hoping to hear the cams never wear out. Not sure if I want to get that deep into it. I have a nice 350 I can replace it with if it has to come out.
As soon as it warms up a bit I hope to do a compression test. I'll look at the valve lift at the rocker arms at the same time.

I've always heard the old 366 had pretty good torque at low rpm.

Coyote,,, Everything wares out, the stroke on a 366 is 3.760 and a small bore, the bore on your 350 is 4. and the stroke is 3.500 so it will have less torque than your 366., just take it out and go though it, if its not cracked anywhere then, re-ring it, new bearings, cam/lifters, gear and chain, oil pump. fix it and put it back in, everything will fit, manifolds and exhaust and all the other stuff. you can still do this in the frame if you don't want to pull it, your going to have the heads off and pistons out you might as well look at the cam from the bottom and see what it looks like. you'll be a happy man that way. Just my dollars worth . Dan

Coyote---- Pull the valve covers and check to see that all rockers are moving fully. If you have a round lobe there will be little or no movement. Been there. A good 366 is a real stump puller when running well.