These belt part #'s are listed elsewhere on SS but I would discourage using them. Both alternator belts will be on the far/long side of adjustment. The 15455 P/S pump belt is too long IMO and cannot be properly tightened if it's stretched or worn even the slightest bit. These are the sizes that were installed (now removed) on my 1031.
Not reccomended P/N's:
· Driver side alt- Gates# 7575; Dayco# 15580
· Passenger side alt- Gates# 7483; Dayco# 15490
· Power Steering- Gates# 7448; Dayco#15455
EDIT on 3/11: Gates/Napa 7575 for driver's side alt is a good p/n and fits well, only 15580 is not recommended
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The following part numbers are from Autozone's computer for an '86 K30 with 6.2
Alternator (pass side) Dayco 15480
P/S pump Dayco 15445
Notice a pattern? Autozone's P/N's are for shorter belts
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Tested and Recommended P/N's
Pass side alt: 15480 (same AZ's P/N for a civvy 6.2)
Driver's side alt: 15573 (It fits)
P/S pump 15445 (Same as AZ's P/N for a civvy 6.2)
The belts that I listed as preferred are pretty much the bare minimum length. All three will all have to be "rolled on" by turning the crank with a long handled 1/2" ratchet or breaker bar even with the brackets fully loosened. You will also *need* a Lisle 12400 belt tensioning tool because with the shorter belts there's no room for the field-expedient prybar method of tightening. The shorter belts are more involved and difficult to install, but on the positive side - you'll never run out of adjustment and run much quieter than the longer p/n belts.
Auto Belt Cross Reference. Gates Napa Dayco Auto Belt Cross Reference
Note: Autozone's "Valucraft" line use Dayco P/N's
Not reccomended P/N's:
· Driver side alt- Gates# 7575; Dayco# 15580
· Passenger side alt- Gates# 7483; Dayco# 15490
· Power Steering- Gates# 7448; Dayco#15455
EDIT on 3/11: Gates/Napa 7575 for driver's side alt is a good p/n and fits well, only 15580 is not recommended
--------------------------------------------------------------------------------------------------
The following part numbers are from Autozone's computer for an '86 K30 with 6.2
Alternator (pass side) Dayco 15480
P/S pump Dayco 15445
Notice a pattern? Autozone's P/N's are for shorter belts
---------------------------------------------------------------------------------------------------
Tested and Recommended P/N's
Pass side alt: 15480 (same AZ's P/N for a civvy 6.2)
Driver's side alt: 15573 (It fits)
P/S pump 15445 (Same as AZ's P/N for a civvy 6.2)
The belts that I listed as preferred are pretty much the bare minimum length. All three will all have to be "rolled on" by turning the crank with a long handled 1/2" ratchet or breaker bar even with the brackets fully loosened. You will also *need* a Lisle 12400 belt tensioning tool because with the shorter belts there's no room for the field-expedient prybar method of tightening. The shorter belts are more involved and difficult to install, but on the positive side - you'll never run out of adjustment and run much quieter than the longer p/n belts.
Auto Belt Cross Reference. Gates Napa Dayco Auto Belt Cross Reference
Note: Autozone's "Valucraft" line use Dayco P/N's
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