What is the application for this belt GM3861950

[Ralph S.]

Moulded into the belt is GM3861950 XP 54.00 X 380 5- 1990

[Joe L.]

Re: What is the application for this belt GM3861950

Moulded into the belt is GM3861950 XP 54.00 X 380 5- 1990

Ralph------


I can't find any Chevrolet passenger car or light truck application for the GM #3861950. So, even though it's a Chevrolet part number, I expect it was used for some other GM car line(s).

[Dick W.]

Re: What is the application for this belt GM3861950

I have one back on the rack in the parts room. I cannot remember what it fits, Dayco catalog says it was used in pairs on '69-69

[Paul O.]

Re: What is the application for this belt GM3861950

From what I came up with is 1968 427 Alternator without A/C and P/S.

[Dick W.]

Re: What is the application for this belt GM3861950

From what I came up with is 1968 427 Alternator without A/C and P/S.

Sounds about right

[Henry J.]

Re: What is the application for this belt GM3861950

It is depicted as Item 8, Option page L36, Sheet A7 in the 68 AIM. It is an alternator belt, positioned on the second belt track.

[Joe L.]

Re: What is the application for this belt GM3861950

It is depicted as Item 8, Option page L36, Sheet A7 in the 68 AIM. It is an alternator belt, positioned on the second belt track.

Henry------


Yes, I see now that it is listed in the 1968 AIM for the L-36 application. However, strangely, it was never cataloged by GM as the SERVICE belt for that application. In addition, it was never even classified by GM as a part used for the Chevrolet car line (although other belts of the 38619xx series were). So, a Chevrolet dealer could only have ordered it if the customer specified the part number.

[Edward J.]

Re: What is the application for this belt GM3861950

Ralph, I Googled that part no. it comes up as a 427/390 alt. belt. what year?

[Ralph S.]

Re: What is the application for this belt GM3861950

I think i had it on my 69 435hp car at one time.

[Edward J.]

Re: What is the application for this belt GM3861950

I would imgane that the alt.and brackets may have been the same on the 69 435 car.

[Henry J.]

Re: What is the application for this belt GM3861950

In 68 and 69, the crankshaft pulley called out in the respective AIM's for L36 is the same: #3921923. Similarly, in 68 and 69, the water pump pulley is the same: #3889372. However, the 68 alternator pulley is #3829387 and the 69 alternator pulley is 3846180.

For both model years, there appears to be no different pullies called-out specifically in the respective AIM's for the L71.

[Joe L.]

Re: What is the application for this belt GM3861950

In 68 and 69, the crankshaft pulley called out in the respective AIM's for L36 is the same: #3921923. Similarly, in 68 and 69, the water pump pulley is the same: #3889372. However, the 68 alternator pulley is #3829387 and the 69 alternator pulley is 3846180.

For both model years, there appears to be no different pullies called-out specifically in the respective AIM's for the L71.

Henry-----

I believe L-71 used crank pulley GM #3863108. This is a cast iron pulley. The GM #3921923 used for L-36 is a stamped steel pulley.

[Joe L.]

Re: What is the application for this belt GM3861950

Ralph, I Googled that part no. it comes up as a 427/390 alt. belt. what year?

Edward-----


The only PRODUCTION Corvette application as evidenced by the AIM that I can find for the GM #3861950 belt is 1968 with L-36.

[Henry J.]

Re: What is the application for this belt GM3861950

Yes, Joe. I agree. There is ample evidence in the literature that I've reviewed to suggest that you are absolutely right.

Although I can't find #3863108 in the 68 and 69 AIMs, it may be included in the "parts list or bill of materials" for the L71 option that is referred to therein.