|
use whatever fits best... In the end the objective of belt sizes is fairly simple: to get a belt that's correctly tensioned in about the middle to upper half of the adjustment range.
For the AC, it'll be obvious whether or not you can slide your old 13*925 belt over the pulley and tension it correctly. If you really need that 975 I'ld expect you would be unable to pull the 925 belt onto the pulley.
For the PS, the same goes for length - if the new pump has a different bracket or pulley that requires a longer belt, the old one won't fit. As to width, if the new pump has a pulley for a 10 mm belt I wouldn't expect it to support a 13 mm belt. Your only problem might be that the crank pulley is too wide to support a 10mm belt - at least clean that groove thoroughly, a 13mm belt will have run much higher in the groove so the lower part where a 10mm would ride will probably be caked with crud and rust. If it won't support a 10mm belt, you'll also need to get an '86 crank pulley that has the correct grooves.
If you're combining new units with the old brackets, it's a bit of a gamble what size you'll end up with. Always remember, the important thing is for the belt to be correctly tensioned, use whatever size belt will let you accomplish that objective.
Bram
|
