Pulley Problems

Can anyone give me an idea of what is causing this to happen??? This is the second pulley that the 283 has eaten. The first appeared to be the stock one, which I could understand since it was probably 40 years old. However this one was a new J C Whitney with less than 500 miles on it.

Have I got anything missing?
Should I replace the aluminum spacer between the pulley and fan?
Would an aluminum pulley be more forgiving?

Are there any deformities on the crank pulley that might make a tight spot on the belt?

as long as the crank pulley is ok and the water pump shaft is good i would get a stock pulley, ditch that fan cause it may be bent and get another spacer. basicly start over but run a metal deep pitch fan.

Water pump bearing done? In pic of pump without pulley, looks like wet spot underneath...

What about proper spacing of alt (or any other pulleys)... Notice wear pattern on one side of belt would indicate that pulleys aren't in straight line. Wish the belt would have popped off first rather than chew up pulleys on you.

Also seems like mating surfaces between water pump, pulley and fan are a little chewed up. Might need to smooth those surfaces out for fitment and balance before you try a new pulley. Or replace fan... if it's out of balance, it will wreck any water pump with new bearings.

Sounds like I need to go with all new from the block out. Everything in the pic's except for the trashed pulley came on the motor when I got the van. There doesn't appear to be anything wrong with the water pump but it wouldn't hurt to change it and not that expensive. Didn't have a spacer between the pump flange and the pulley(the piece leaning against the pulley in the pic is the center of the pulley) and the pulley was brand new for a small block chevy. I'll get a new fan and spacer like I'm running on my 67, haven't had any problems with that setup.

Anyone have a suggestion on a brand of pulley? The one from Whitney wasn't very heavy.

2nd on the stock one

Its a shame our aftermarket parts have all gone overseas.We don't know what we're gettin nowdays.I agree with replacing the water pump now,while your this far,instead of 2nd guessing 'when' it might go.The plain Jane stock pulley and fan is my preference,but to each his own.But like you said,that's the way it was when ya got it.Be glad you found your troubles when you did,instead of drivin.Might be in the market for a radiator too,or possibly a trip to the E R.I'll look in the 'spare box' if ya want me to.

Thanks Moe! I'm going to check with my parts guy next week and see what he can get in the way of a pulley. Would rather put on a new one if I can get a stock replacement. Definitely going with a new fan and spacer. I checked the pump flange today and it is running true. No movement up or down, in or out. No leaks so I'm going to go ahead and run it. No unusual wear on the belt so I think the problem was like Don said, the cheap pulley.

Im going to chime in here one more time. Seeing as it has already eaten the first pulley I would take a closer look at the crank pulley. It wouldn't take much of a distortion in groove width to create a "high" spot causing for no better term a micro vibration that wouldnt be seen but could cause those kind of stress fractures over a period of time. The lower pulley is also tin ?? somebody may have used it as a place to jack up the engine or smacked it with a hammer to remove it .

Thanks Digz ! I'll make sure and check the crank pulley before I put anything back together.

Bill thanks for posting the link to the pulley on e-bay!

Checked the crank pulley and there doesn't appear to be any problems there, couldn't see any wobble or abnormal rotation.

The pulley on e-bay is for an I6.

Finally got the parts and put it back together today. New waterpump , new pulley (Mr.Gasket double grove), and new fan spacer. We'll see how long this one last. Everything looks in line and can't see any wobble when it's running.

For some reason though the temp gauge will not register now. Was working the last time it was running and I didn't touch the gauge or the sending unit. Just changed the waterpump and bolted everything else back on and put the antifreeze back in. I'm getting flow through the radiator but the gauge never moved. Ran it for about 30 minutes, even drove down the road and back.

ONE STEP FORWARD TWO STEPS BACK !!!!!!!!

Anyone have any ideas or know of a way to check the temp gauge? It's a Sunpro with thermocouple type sending unit.

just ground out the wire to the sending unit and see if it peggs the guage. that is if it is a 1 wire sender anyway. I know what ya mean by 1 step > 2 steps < think I cooked my alternator already , got it way early in the build , its only a 37 amp already cooked a diode,,lol, hope the pulley is cured for ya!

Thanks Don , I'll try that tomorrow. I thought I had heard of that before but wasn't sure and didn't know what to do about it.

Digz sorry about you alt ! Have you got any idea of the cause? With all the wiring you've done that could be hard to find.

Did learn one useful thing during this time around. First new pulley I got was a single groove for a SB chevy with the short pump. It rubbed the crank pulley when I tried to install it(the crank pulley is a 2 groove). Took that one back and got the 2 groove for the same type engine and it's about 5/8" smaller diameter. Was checking the pulley sizes on Jeg's web site last night and noticed that the single groove crank pulleys are a smaller diameter than the 2 groove pulleys. Still haven't figured out why all the different diameters.

took the 8 blade deep pitch the po put on, sounded like the space shuttle taking off, made a big noise diff and bonus torque and power.
jeff

Got everything working with exception of a leak on the lower rad. hose. Going to pick a new one up today.Thanks for the help guys.