1966 A.I.R. pump date code

[Craig C.]

My option K19 smog A.I.R. pump is julian dated 23?61P where the ? is not the number "1" but rather is a verticle "slash" like the small letter L "l". The "l" and the "1" are clearly not the same font. Could this be the 23rd day of 1966? Although I would expect 023, could there be a variation? My '66 coupe was built in March '66, so I think the 231st day is too late. Thanks, Craig

[mike mccagh]

Re: 1966 A.I.R. pump date code

i believe the 26th day of 1966 would read 0226.the 231st day of 66 is way too late for a march 66 car build date. mike

[mike mccagh]

Re: 1966 A.I.R. pump date code

PS: is there a triangular notch cut off the pump where it would normally rub the upper radiator hose as they did for the 67 pumps? mike

[Craig C.]

Re: 1966 A.I.R. pump date code

Mike, I will check that tonight. Craig

[Gary J.]

Re: 1966 A.I.R. pump date code

Is your car a small or big block? I have a big block with A.I.R.

Gary Jaynes
#3503

[Craig C.]

Re: 1966 A.I.R. pump date code

Gary, the car is: 1966 coupe, base engine, A01, A31, A82, C60, J50, K19, M35, N36, N40, U69. Thanks, Craig

[larry linkous]

Re: 1966 A.I.R. pump date code

Craig, I believe there clearly is a wide variation on pump use in 1966 and 1967 Corvette's. I have been studying this quite a bit lately and have found and logged pictures of many different pumps , on many different Corvette's that everybody is calling correct. In fact on E-Bay there is a 327 Corvette motor that clearly shows the large outlet port on the back of the casting coming out at a angle, the only one I have ever seen like that. What I really think happened at GM was they were not ready to supply all the pumps as needed and they borrowed pumps from other lines and modified them as needed. If you like I can send over pictures of 66 and 67 pumps and just about every one has some difference's. Thanks Larry

[Dale S.]

Re: 1966 A.I.R. pump date code

Larry, I would love to see those pictures as I have a 67 C-2 327/300 W/ K19 and A/C. It is a March 30 built car. I thur away my K19 stuff in 1972 or so as it was impossible to change the passenger side rear spark plug with A/C and the tubes. i have been looking for replacement parts but none have looked like my pump. Email me Dale

[Craig C.]

Re: 1966 A.I.R. pump date code

Thanks Larry, yes please send me the pictures, they would be very helpful for me, I can also send you a picture of mine. Craig

[Joe L.]

Re: 1966 A.I.R. pump date code

larry-----

There were several relatively minor variations for these 66-67 style pumps. However, the Corvette pumps were unique in that they had the "T" off of the aluminum body for the outlet tubes. All other pumps have the outlets coming off the backing plate. If you find a pump with a "T" fitting off the aluminum case and plugged or unmachined fittings on the rear of the pump, it is a Corvette pump. If it has rear fittings for the outlet and no "T" on the main body, then it's NOT a Corvette pump. It's as simple as that.

[Kevin M.]

Re: 1966 A.I.R. pump date code

Joe,

I think in the past you posted that the 66-67 pumps were never made for service. This might explain why Larry has seen different pumps, they must of just adapted a service pump to work on Corvettes for warranty service. Or did they rebuild them? Just a guess mine is the correct one but I have seen plenty of the other versions on GM cars in the junk yard.

Kevin

[larry linkous]

Joe

Joe I agree 100%. The thing I see is where the pump is cut on one of the bosses at a small 45 degree angle and no rear bolt hole on the rear casting (which is suppose to be 67 only) shows up on some 66 Corvette's and the pump with no cut (which is supposed to 66) shows up on 67 Corvette's. A example is on E-bay right now on a 67 350 HP motor. It looks to be very original and the pump DOES NOT have the 45 degree angle on the aluminum body bolt boss Bill Hodel say's it needs. Also note the tube on the low side coming out at a angle. I have never seen that before. I also have noted that not all 'T' tubes look the same and I can not quite figure that out. Some seem to be straight, some angled and some look entirely different. However I do respect you and your opinion and you have helped me out many times lately, inculding looking at a smog pump I sent pictures over. Just seems to be a lot of confusion on my part and please correct me if I am wrong on any of the above!! Again, Joe, thank you for all the help!!

[Joe L.]

Re: 1966 A.I.R. pump date code

Kevin-----

If I said that 66-67 pumps were not available in SERVICE, then that was a mistatement; they were once available in SERVICE.

[Joe L.]

Re: Joe

Larry-----

Yes, the several variations that you mentioned are among the "minor variations" that I was refering to in the previous post. However, I don't think that any of these represent any attempt by GM to use a pump designed for another application in a Corvette application. They are just variations that existed in the Corvette pumps over the 66-67 period. Some may have represented an actual change in part number and others may have been the result of a revision within the same part number. It's even possible that some were the result of modifications made at the vehicle assembly plant to deal with an assembly problem. The AIR system was in its infancy at this time; a lot of problems had to be sorted out at various levels.

[Kevin M.]

Re: 1966 A.I.R. pump date code

Now that I think about it we might have been talking about the diverter valve.

Kevin