Small Block Fan Belts

bwhitejr · Oct 8, 2007

I am installing the engine front end of my sb 360 in my Duster. The engine has a 3 groove crank pulley, which will drive the alternator, water pump amd power steering pump. Which groove drives which device/devices?

Thanks in advance,

bwhitejr

abodyjoe · Oct 8, 2007

the alt,water pump and crank is one belt. and the ps to crank is another belt.

ted_sweet · Oct 8, 2007

3 grove crank pulley came from an a/c car.

bobscuda67 · Oct 8, 2007

The inside groove drives the water pump and the alternator. The middle groove drives the power steering pump. The outside groove drives the AC compressor. My car has a three groove crank pulley too. It has the single belt compressor setup. Hope that helps you out.

abodyjoe · Oct 8, 2007

bobscuda67 said:
The inside groove drives the water pump and the alternator. The middle groove drives the power steering pump. The outside groove drives the AC compressor. My car has a three groove crank pulley too. It has the single belt compressor setup. Hope that helps you out.

what year car is that on? 70 and up with air had two belt going to the crank, a/c and the alt.. and one belt going to the ps, water pump and the crank.

abodyjoe · Oct 8, 2007

on a ps car i believe that the belt closest to the motor is the alt,water pump and crank belt. then the next one forward should be the ps to crank belt.

340mopar · Oct 8, 2007

Joe nice pic, did you notice a 318 with a thermoquad and a-body manifold?

Chuck

bobscuda67 · Oct 8, 2007

abodyjoe said:
what year car is that on? 70 and up with air had two belt going to the crank, a/c and the alt.. and one belt going to the ps, water pump and the crank.

That was on my 67 barracuda. As you stated, 70 up cars had 4 groove crank pulleys with air. Nice graphic!

abodyjoe · Oct 8, 2007

That was on my 67 barracuda. As you stated, 70 up cars had 4 groove crank pulleys with air. Nice graphic!

yea i figured it was something older.. think jamies 69 dart is like you said.

that pic came out of a service manual i have here.

340mopar · Oct 8, 2007

I guessing it is really a 340 and the 318 was just and example.

Chuck

mullinax95 · Oct 8, 2007

The carbs middle section (black part) was made out of plastic back then wasn't it?

340mopar · Oct 8, 2007

Yes, thermoquads middle section was a type of plastic.

Chuck

bwhitejr · Oct 9, 2007

Here is a picture of my 360 setup. The water pump doesn't line up with the alternator and crank pulleys. Is this the right water pump pulley for a 1978 360 truck engine?

http://www.hal-pc.org/~bwhitejr/Nikon111.jpg

Thanks for your help!
bwhitejr

djwhog · Oct 9, 2007

340mopar said:
Yes, thermoquads middle section was a type of plastic.

Chuck

Phelonic plastic, overhauled 100s when i worked at the dealer back i nthe day! Good carbs

abodyjoe · Oct 9, 2007

Here is a picture of my 360 setup. The water pump doesn't line up with the alternator and crank pulleys. Is this the right water pump pulley for a 1978 360 truck engine?

http://www.hal-pc.org/~bwhitejr/Nikon111.jpg

Thanks for your help!
bwhitejr

it looks to be the wrong water pump pully. a non a/c water pump pully is deeper then that.

abodyjoe · Oct 9, 2007

you know you have to watch some of those treuck set ups.. i know when i had my non a/c lil red express it used an idler pulley where the a/c would be. so i guess if thats what you have then there is where the problem is.

here is the set up on my dart. it is the correct non a/c set up. without a/c you should never need to use the front pulley on a 2 groove alt. if it only lines up with the front groove then there is a problem somewhere. will it work? yes but it isn't correct.

abodyjoe · Oct 9, 2007

see how the alt and water pump uses the rear most pully? the front pulley would be for the power steering.

abodyjoe · Oct 9, 2007

here is where i think your problem is...

the black pulley is an A/C pulley.

the chrome pulley is a NON A/C pulley.

see the difference ? i know it isn't much deeper but its enough deeper. i think it is where your problem is.