Vette79C3

I'd love to know where you got the belt and what the part number is. Actually, just sell me yours.........lol. Do you remember the sizing?

wcsinx

I'll get you the brand and part # tonight and from that you can decode the sizing. Then any decent parts house (which is to say not Autozone) can cross reference belts based on the dimensions.

Vette79C3

And maybe even a more complicated question, does it matter if you have the water pump to crank belt? I ask because once you remove the AC and that AC belt, it also removes the belt contact area which aided in turning the pulley's, right? That is what prevented belt or pulley slippage, right?

Vette79C3

Perfect! I'll got to NAPA and see if we can't come up with a belt with the data you provide.

wcsinx

Like I said, some people have problems and some don't. It takes a certain amount of torque to spin the WP, and it's hit or miss as to whether or not that little section of the alternator belt can apply that torque without slipping. I ran for years without the crank/WP belt, and I never had problems with slippage. But I always kept my pulleys very clean and the alternator belt very tight. I was never comfortable with driving the water pump like that though, so I tracked down a belt when I redid my cooling system.

Vette79C3

Yep, I see what you mean. I have noticed my water temp a tad hotter then usual after removing the AC. A shorter alt belt and the WP to crank belt I think is needed. I will be looking forward to your message with info.

Thanks to all who assisted with this issue. BK can you send me that pic via email?

vette79c3@verizon.net

BKbroiler

Email sent, hopefully.

wcsinx

I have a Gates belt part number 7340.

http://www.autopartstomorrow.com/par...rs/234808-belt

Here's a pic of the fitment.

billcarson

wcsinx that looks like a nice fit and you can't go wrong with gates belts and hoses.does your car feel any different with the addition of the extra belt?do you think it robs some power?aside from the squeal did you feel more secure because you have a backup pump belt?sorry for all the questions but i'm curious if guy's are doing this for different reasons.

wcsinx

Nope and nope, parasitic loss due to the WP is theoretically unchanged because I had no slippage before. I suppose there's a tiny bit more drag simply from rolling another belt around, but I doubt it would even be measureable.

Yes

It just didn't feel & look right to have the WP driven by such a small footprint of the alt. belt. The stock non-AC configuration does indeed have that crank/WP belt.

billcarson

thanks for the response.

Vette79C3

Looking at my shop manual it shows a 79 without AC just has the ALT belt and not a Crank to WP belt. Either way, I agree with you that it is an aweful small footprint now with removing the AC and a belt from the Crank to WP is needed. Thanks for the info. I will keep you posted

jerome1979

I use "metric" belt (A/C removed)
Alt: 13x1400
PS: 10x925
I want a WP/cranck blet so i will try to find one !!!
As soon as i have one i give you the ref

Vette79C3

jerome, wcsinx provided a belt part# and link from Crank to WP a few comments above. If that works for him and our configuration is similar then I'm going to purchase it and try to install.

jerome1979

I know but in France such belt are not easy to find !!!
So i must order it in USA: 5$ part and 35$ for shipping
So i search a cheapest way

KapsSA

Same mistake I made the other day

Look closer....."2ND TRACK". You can't see the back side but it's there.

G-Sting

I have a '79 L82 4 speed without AC (original). When I bought the car 2 years ago, it had less than 10k miles and all original belts. I still have the crank to WP belt and the GM part number on it is: 3935420.

This Zip belt is the one that matches the current belt (so they say).

Here is a pic of the layout: The center belt is the old crank to WP belt discussed. Hope it helps.

Vette79C3

Thanks G-Sting. Love the pic. Apparently the ones without AC have smaller width pulley grooves. So I have to locate a belt that would be the same width as the factory AC belt. It's good to know for sure though that there definitely was a crank to water pump pulley belt. I suppose the more costly option would be to get that belt and purchase a new water pump pulley if all else fails.

bpassmore

I have a June-'82 parts cat. listing 1979 1-L-48 water pump fan belt as part number 9433718. 33.00",7/16 (.440).

Vette79C3

OK, but is that with or without AC? It matters as the pulley's are different sizes.