1970 Corvette LT1 Choke Thermostat

[David S.]

Looking to buy an NOS choke thermostat for my 70 LT1. Does anyone know the GM part number?

The two I keep seeing are 3992082 and 39977103. Any help is appreciated.

Thanks,
Dave

[Joe L.]

Re: 1970 Corvette LT1 Choke Thermostat

Looking to buy an NOS choke thermostat for my 70 LT1. Does anyone know the GM part number?

The two I keep seeing are 3992082 and 39977103. Any help is appreciated.
Thanks,
Dave

Dave-----


The 1970 LT-1 choke thermostat was GM #3887148. It was discontinued quite a few years ago.

GM #3992082 was the 1971 LS-6 choke stove. It's a completely different design than the 1970 and earlier choke stoves inasmuch as the 3992082 as well as other 1971 choke thermostats include an integral stove. The 3887148 uses a choke stove which is integral with the manifold casting.

I don't know what a 39977103 is. That's too many digits to be a GM part number of the period.

A few more tidbits:

The choke thermostat used in PRODUCTION was never available in SERVICE. That's because the PRODUCTION piece was an ASSEMBLY consisting of the choke rod, thermostat, and choke cover. However, I'm VERY confident that 3887148 thermostat was part of that assembly.

The 3887148 thermostat used as part of the assembly as well as that sold in SERVICE "way back when" had a frame/bracket that was natural steel. That sold in later SERVICE had a frame/bracket that was bright zinc plated.

[David S.]

Re: 1970 Corvette LT1 Choke Thermostat

As always, thank you Joe.

[Edward J.]

Re: 1970 Corvette LT1 Choke Thermostat

David, if you send Ralph Spears a PM he may have a NOS one . just give him the part no., He has many C3 parts and had a 70 LT1.

[Joe L.]

Re: 1970 Corvette LT1 Choke Thermostat

The GM #3887148 is not uniquely applicable to 1970 LT-1. It was also originally used for all 1966-67 Corvettes as well as 68-69 with Holley carbs.