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View Full Version : 454 belt diagram for 1973, no smog pump, no AC


redgrizz
03-12-2012, 06:31 PM
I'm looking for a 1973 454 belt diagram. No smog pump and no AC. Only 2 belts, one i know 1 goes around the crank, water pump and alt. The other, local shop says it just goes from the crank to the PS. But i think it should be longer and run from the crank, water pump and PS. Wonder who is right? A single belt on the water pump seems like it would slip. But I'm just a back yard mechanic.
dave89iroc
03-12-2012, 07:53 PM
Most likely just the crank and p/s
ryan_thompson87
03-12-2012, 09:37 PM
Yep more than likely just around the crank and p/s pump. Mine was originally like that, but I swapped a double pulley on to the water pump so I could run a longer belt that went around the Crank,water pump and P/S, that way if I lost the Crank/Alt/Water pump belt for whatever reason (It's happened) I would still have a belt to run the water pump.
redgrizz
03-13-2012, 05:57 PM
Yep more than likely just around the crank and p/s pump. Mine was originally like that, but I swapped a double pulley on to the water pump so I could run a longer belt that went around the Crank,water pump and P/S, that way if I lost the Crank/Alt/Water pump belt for whatever reason (It's happened) I would still have a belt to run the water pump.

Exactly my thinking, my water pump is already a double pulley. But the path from the water pump pulley to the crank seams pretty tight - the water pump housing might be restricting. We'll see. Do you by chance remember how long that belt is? Dayco part number?
XLR8N
03-13-2012, 06:32 PM
How would you tighten the belt if it was only going to the crank and ps? Just thinking out loud.
LeoP
03-13-2012, 06:46 PM
OK, here is what I have in my 80 GMC. The truck has a 72 402 in it, but I have been buying parts and belts for a 454, my engine has a two groove w/p pulley and the PS belt goes around the w/p as well as the crank and p/s pump. Hope this helps.
Jmac72
03-13-2012, 09:28 PM
How would you tighten the belt if it was only going to the crank and ps? Just thinking out loud.

The ps pump bracket is sloted. just tighten it up.
ryan_thompson87
03-14-2012, 06:43 AM
I believe it was a 45" belt.
XLR8N
03-14-2012, 09:06 AM
The ps pump bracket is sloted. just tighten it up.

Oh alright. I remember the alternator but not the ps. Thanks