Does anybody know the original GM parts numbers or the correct lengths for the 4 belts on 86 442 with a 307 (a/c).
So the 83 HO is different? I know the 9 has a real balancer. Does it have the 3 groove crank pulley? I know the Y does not.383_StealthRam posted for LV2, or NON-442. Which is great, but they used a little different setup for belt routing, thus different part numbers. Granted, they used LV2 for 84 H/O engine, but in 85, they gave it a new designator of LG8. Kinda confusing.
For 85-87 442 (and from what I understand, starting mid-year production of 84 H/O)-
85-87 VIN 9 POWER STEERING BELT
Factory and initial Service number 9433640 Belt-(3/8 X 45.00)
Later the service number superseded to 9433743 Belt-(7/16 x 45.50)
85-87 A/C BELT
Factory/Service 9433756 Belt - (7/16 X 52.00)
85-87 ALTERNATOR BELT
Factory/Service 9433764 Belt - (7/16 X 56.00)
85-87 A.I.R. PUMP BELT
Factory/Service 9433847 Belt- (5/16 x 46.50)
View attachment 116359
Yep. 83 H/O and 1st part year (not sure of the VIN break) 84 H/O used the separate alternator belt which did not partially wrap around the PS pump. In fact, I believe it is the same part number as the 85-87 VIN 9 PS belt for the 83/84 H/O alternator. It goes from water pump to alternator only.So the 83 HO is different? I know the 9 has a real balancer. Does it have the 3 groove crank pulley? I know the Y does not.
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