Alt./waterpump/PS belts

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Rt.146
Posts: 654
Joined: Wed Dec 20, 2017 7:40 pm

Alt./waterpump/PS belts

Post by Rt.146 »

Does it matter what side of the belts ride on the pulleys of a 390 no A/C, smooth side or cog side?
jtschug
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Joined: Fri Sep 11, 2015 1:33 pm

Re: Alt./waterpump/PS belts

Post by jtschug »

This is a confusing question.

The cog side is the inside of the belt. The pulleys go on the inside. I don't know how it could be any other way. Sometimes a tensioner rides on the outside of the belt, but there are none on these cars.
1966 Thunderbird Convertible (Emberglo / White-Emberglo)
Modified 428 - stroked, rollercam, aluminum top end, headers
Livermore, CA
Rt.146
Posts: 654
Joined: Wed Dec 20, 2017 7:40 pm

Re: Alt./waterpump/PS belts

Post by Rt.146 »

I took this pic. before I put in the new water pump and timing chain, I was looking at the picture and saw the cogs on the belt facing up in the pic. I was wondering if it was the right set up.
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jtschug
Posts: 1472
Joined: Fri Sep 11, 2015 1:33 pm

Re: Alt./waterpump/PS belts

Post by jtschug »

That is just a peculiarity to that particular brand of belt. Those belts in that picture are installed correctly.

The cross section of the belt is a "V", thus the name V-belt. The point of the "V" goes into the groove of the pulley. It would be very difficult to do it wrong.
1966 Thunderbird Convertible (Emberglo / White-Emberglo)
Modified 428 - stroked, rollercam, aluminum top end, headers
Livermore, CA
Rt.146
Posts: 654
Joined: Wed Dec 20, 2017 7:40 pm

Re: Alt./waterpump/PS belts

Post by Rt.146 »

OK, thanks for the replies, I understand now, just some of the confusions I get myself into.
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