V-belt fitment?

[Boomyal]

How low in the pulley should a V-belt sit? Today I went to NAPA to replace my water pump/alternator belt. Somehow between the time I took it off the motor and the time I went to reinstall it, it became way too long???????<br /><br />The original belt was a Goodyear and the back of it fit flush with the top edge of the pulleys. The new, shorter NAPA equivalent was noticably wider and when I set it in the pulley it only sits about 1/2 to 3/5ths of it's thickness down into the pulley, in other words, almost half of it is sticking up out of the groove. The angle looks okay, best I can tell.<br /><br />The NAPA people said the belt was equivalent and just a difference in design theory.<br /><br />Any opinions here???

 

[Don S]

Re: V-belt fitment?

Should sit about flush with the top of the pulleys. They obviously gave you the wrong width belt. They do come in different widths also.

 

[Dunaruna]

Re: V-belt fitment?

Auto/marine belts are made in 5 different widths - 10.7mm(11A), 13.3mm(13A), 17.3mm(15A) 18.8mm(17A) and 22.8mm(20A). Most common is 11A & 13A.<br /><br />My 302 has 11. A 13 (sound like that's what they gave you) will not sit snugly into an 11mm pulley. It will cut and split because it's riding on the edge of the pulley.<br /><br />About 2/3rd of the belt needs to be inside the pulley groove, not touching the bottom.<br /><br />Cut your old belt, run it along a tape measure for length, measure the width - go back to napa and TELL that idiot saleman (I use that word loosely) what you want - IMhumbleO

 

[Boomyal]

Re: V-belt fitment?

I brought them the old belt. Can't be sure it was the original profile but it seem to fit in the pulley a lot better than their replacement. I will take it back with a pulley in hand as well. I'll have them look it up in their marine catalogue as well. If they have an antique one, that is. <br /><br />Thanks all.

 

[Boomyal]

Re: V-belt fitment?

I brought them the old belt. Can't be sure it was the original profile but it seem to fit in the pulley a lot better than their replacement. I will take it back with a pulley in hand as well. I'll have them look it up in their marine catalogue as well. If they have an antique one, that is. <br /><br />Thanks all.

 

[Dunaruna]

Re: V-belt fitment?

They may have a wall mounted belt identifier, it's a devise that measures width and length.

 

[Boomyal]

Re: V-belt fitment?

Originally posted by Dunaruna:<br /> They may have a wall mounted belt identifier, it's a devise that measures width and length.

Danke schoen!

 

[Dunaruna]

Re: V-belt fitment?

Keine probleme.