My 1971 AIR pump has the correct number on the back #7801149 but does not have a date code on the small flat spot on the bottom where the bolt holds the back on. I did not remove it. It was purchased on ebay with a bunch of parts--some of which where correct and many that were incorrect--all numbers were on every part and no attempt to hide anything. I don't think they would have wasted their time to remove this number and it doesn't looked like there was ever a number. Is this number judged and even if it isn't would it be considered correct since the number on the back is correct? Thanks for your help.
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Re: 1971 AIR (Smog) Pump Question--No Numbers
Paul,
Yes it is. That number has several digits some letters and some numerals. Both of my '71's have it. -
Re: 1971 AIR (Smog) Pump Question--No Numbers
The question is asked the number is judged. Next is what do I do since it has no number? An AIR pump expert said he has seen pumps without a number stamped on it.Comment
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Re: 1971 AIR (Smog) Pump Question--No Numbers
The number on the back is a casting number and is on most castings from the period. The diverter valve has a part number that can be judged without a mirror and if correct may lead a judge to belive the pump is also if he is in a hurry that day.
The date on the pump is very small and can be judged with a mirror but it is hard to read backwards but if found incorrect or missing with the information spelled out in the TIM&JG some judges may take a deduction unless they think blank is ok.
I doubt their is an answer for your question because judges may have different views of a questionable item such as no number on your pump.Lyle
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Re: 1971 AIR (Smog) Pump Question--No Numbers
I was told there was a number on the diverter valve but I couldn't find it--keep looking on the flat area and didn't see anything. Finally I used a 10x magnifier and then I was able to see the number and read it. Are they usually easy to read?Comment
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Re: 1971 AIR (Smog) Pump Question--No Numbers
With a high powered flashlight they are easy to read on most valves.Lyle
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Re: 1971 AIR (Smog) Pump Question--No Numbers
What number are they looking for: the 7034481---easy to see and read--- on the top of the connecting tube OR the 29199 on the flat spot below the muffler---very difficult to see and/or read? ThanksComment
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Re: 1971 AIR (Smog) Pump Question--No Numbers
The 7034481 is the cast number for the elbow -which is common for many different diverter applications. The 29199 is the one they look for.
Not always important to actually read it, as this valve has a particular configuration.
I have also seen quite a few pumps where the date was omitted...
depends on the judge- Personally - I would not deduct.Comment
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Re: 1971 AIR (Smog) Pump Question--No Numbers
Just a guess - don't have them in front of me.
But I would imagine it wears a different hood angle, and/or 481 valve is pointed in a different way.
Broadcast code would be different too.Comment
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Re: 1971 AIR (Smog) Pump Question--No Numbers
Lyle----
The GM #7029199 and 7029190 are configured the same. There must be some sort of internal calibration difference between the two valves. I have several NOS examples of the 7029199 and an NOS example of the 7029190 [none for sale] and I tried to "dig them out" to confirm this but I ran out of patience. I found the 7029199's and about a dozen other NOS valves of various part numbers, but I couldn't find the 7029190. I know it's there, though. My distinct recollection, however, is that the 7029199 and 7029190 are configured the same.In Appreciation of John HinckleyComment
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Re: 1971 AIR (Smog) Pump Question--No Numbers
I agree Joe as I never seen any difference in configeration so I thought if I ask I might learn something.Lyle
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Re: 1971 AIR (Smog) Pump Question--No Numbers
I have some of both 29190 and 29199 and believe the appearance to also be the same.
top one is 29199 and bottom dirty one is 29190Comment
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Re: 1971 AIR (Smog) Pump Question--No Numbers
The date code (on the bottom of the rectangular boss, lower center, engine side) is always judged as well as the finishes for all the different components ie; gold dicromate, grey phosphate, natural alum., white plastic fan, etc. 20% off if you can't see the date code. The bracket,hoses, clamps(with date),trees, are also judged. Lots of stuff!Comment
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