1989 A.I.R. (Smog) Pump identification help needed

[David L.]

I have a nice unmodified smog pump (which might be a "take off") with casting number "7832904", "METRIC", "13" and "DF" (inside a football), and date code "087 9" (the 87th day of 1989) on the cast iron part of the pump. There is a large "JT" ink stamping on the housing as well as the number "11971". According to my research A.I.R. Pump # 7849167 is stamped with either "KA" or "JT" as shown in a 1988 Chevrolet truck catalog. GM pump # 7849167 is also listed for the 1987 "F" (Camaro or Firebird) A.I.R. model with 5.0L V8 (Lg4/305H) engine in a 1988 parts catalog that I found on the web.
I have a 1984 Corvette Parts Catalog (December 1983) that lists 2 A.I.R. different A.I.R. pumps, GM # 7842613 and GM # 7845380 in Gr. 3.660 for the 1984 Corvette. My 1982-1990 GM Parts History manual shows that GM # 7842613 was replaced by GM # 7845380 for over the counter service parts.
3 questions:
1. What is the A.I.R. Pump part number for the 1989 Corvette?
2. What is the 2-letter ink stamping on a 1989 Corvette A.I.R. pump?
3. How does one decode "11971" on my A.I.R. pump?
Dave

[Joe L.]

Re: 1989 A.I.R. (Smog) Pump identification help needed

I have a nice unmodified smog pump (which might be a "take off") with casting number "7832904", "METRIC", "13" and "DF" (inside a football), and date code "087 9" (the 87th day of 1989) on the cast iron part of the pump. There is a large "JT" ink stamping on the housing as well as the number "11971". According to my research A.I.R. Pump # 7849167 is stamped with either "KA" or "JT" as shown in a 1988 Chevrolet truck catalog. GM pump # 7849167 is also listed for the 1987 "F" (Camaro or Firebird) A.I.R. model with 5.0L V8 (Lg4/305H) engine in a 1988 parts catalog that I found on the web.
I have a 1984 Corvette Parts Catalog (December 1983) that lists 2 A.I.R. different A.I.R. pumps, GM # 7842613 and GM # 7845380 in Gr. 3.660 for the 1984 Corvette. My 1982-1990 GM Parts History manual shows that GM # 7842613 was replaced by GM # 7845380 for over the counter service parts.
3 questions:
1. What is the A.I.R. Pump part number for the 1989 Corvette?
2. What is the 2-letter ink stamping on a 1989 Corvette A.I.R. pump?
3. How does one decode "11971" on my A.I.R. pump?
Dave

David------

The part number for the AIR pump for 1987-91 Corvettes was GM #7849157 and was stamped "NP". As far as the numerical coding goes, I do not know, for sure. It MIGHT refer to the 119th day of 1987, 1st shift.

[David L.]

Re: 1989 A.I.R. (Smog) Pump identification help needed

Joe,
After doing research on the web I think that you are correct about the date code "11971" decoding as 119th day of 1987. What I thought was a "9" is probably wrong as shown in the 3rd photo.
The pulley that came with the pump is stamped "14101170 NZ" which is listed for 1987 Camaro models with 5.0L V8 (LG4/305H).
The ink stamping "JT" is listed for the A.I.R. Pump , GM # 7849167 in Gr. 3.660, which is also listed in the 1988 Camaro parts catalog for the 1987 Camaro 5.0L.
The A.I. Cont. valve is GM # 14045849 which is used on 1982-1987 models.
The black plastic fam has the number "7838710".
Here are some photos.
Thanks again,
Dave