93 secondary air inj pump

[John G.]

Hi folks, I'm getting the '93 back together. Have rebuilt the engine and replaced most of the sensors,switches and connectors on this 207K mi. original car. Anyone know where to have smog pump rebuilt or buy a new unit.
Thanks
John G

[Jim T.]

Re: 93 secondary air inj pump

John I bought a air injection pump from Auto Zone for my 68 327/350 L79 a few years ago. It was exactly what I needed. Check with Auto Zone, they had to order the pump and it took a couple days.

[John G.]

Re: 93 secondary air inj pump

All the parts houses list the part but they're no longer available. Rebuilds come back as " no rebuilders participate in program". Thanks

[Terry M.]

Re: 93 secondary air inj pump

John,

Is this an electric pump or a belt driven pump?

[John G.]

Re: 93 secondary air inj pump

Terry, it's electric. It has its own 25A fuse The Delco part 215-90/GM10090521

[Joe L.]

Re: 93 secondary air inj pump

Terry, it's electric. It has its own 25A fuse The Delco part 215-90/GM10090521

John------


The pump is GM-discontinued. However, A-1 Cardone rebuilds these pumps. You can get an exchange from an A-1 Cardone dealer or A-1 Cardone has a rebuild program in which they can rebuild your pump.

https://www.cardone.com

[Terry M.]

Re: 93 secondary air inj pump

Terry, it's electric. It has its own 25A fuse The Delco part 215-90/GM10090521

If this is the same pump for the LT1 in the Caprice -- and I think it is -- there was a recall for it, and there may be some of the recall kits laying around at various dealers. Allow me to check for the kit part number so you can have your local GM dealer run a locator on it.

The problem is failure of the check valves -- then the tubing, especially the long one under the front of the engine, becomes a still and acidic water vapor fills up the tubes. Since the pump is lower than some of the tubes the acidic water eventually fills the pump as well and corrodes the internals.

I took two pumps off of my Caprices and I have one of the recall kits. There was a subsequent TSB that allowed for disconnecting, but not removing (go figure ) the air pump on the Caprices/Impala because the AIR pump works only during the first moments of engine start. It is expected to help heat up the converters on cold start. They basically admitted that the AIR pump does nothing; without saying that in so many words. I believe that TSB applies to Y and F body vehicles as well, but it has been a long time since I looked at it.

Is your concern with the AIR pump emissions inspection, judging, or function?

[Joe L.]

Re: 93 secondary air inj pump

If this is the same pump for the LT1 in the Caprice -- and I think it is -- there was a recall for it, and there may be some of the recall kits laying around at various dealers. Allow me to check for the kit part number so you can have your local GM dealer run a locator on it.

The problem is failure of the check valves -- then the tubing, especially the long one under the front of the engine, becomes a still and acidic water vapor fills up the tubes. Since the pump is lower than some of the tubes the acidic water eventually fills the pump as well and corrodes the internals.

I took two pumps off of my Caprices and I have one of the recall kits. There was a subsequent TSB that allowed for disconnecting, but not removing (go figure ) the air pump on the Caprices/Impala because the AIR pump works only during the first moments of engine start. It is expected to help heat up the converters on cold start. They basically admitted that the AIR pump does nothing; without saying that in so many words. I believe that TSB applies to Y and F body vehicles as well, but it has been a long time since I looked at it.

Is your concern with the AIR pump emissions inspection, judging, or function?

Terry----

As far as I know, there was never a recall for the electric AIR pump on Corvettes. I have owned my 1992 since new and I never received a recall notice for the pump or anything related to it. In fact, the only recall notice I ever recall having received for the car was for the distributor. However, mine failed just before the recall notice was released, so my car was taken to the dealer for replacement on the back of a flat bed tow truck.

[Terry M.]

Re: 93 secondary air inj pump

Then maybe they are not the same AIR pump. Give me some time to check in the garage. At the minimum I should be able to get the kit part number and it may have the campaign number in the included paperwork. It will be well into the weekend before I have time to get to it.

[Joe L.]

Re: 93 secondary air inj pump

Then maybe they are not the same AIR pump. Give me some time to check in the garage. At the minimum I should be able to get the kit part number and it may have the campaign number in the included paperwork. It will be well into the weekend before I have time to get to it.

Terry------

The Impala SS (also same as police package, I believe) used a different electric AIR pump than Corvette. It is GM #12554580 and remains available in SERVICE.

[Don G.]

Re: 93 secondary air inj pump

Joe

I think the AIR pump used on 92-93 LT-1 and 90-95 LT-5 were unique in that they were the only application that used the foam filter. Is that correct?

[Terry M.]

Re: 93 secondary air inj pump

Terry------

The Impala SS (also same as police package, I believe) used a different electric AIR pump than Corvette. It is GM #12554580 and remains available in SERVICE.

Well that would explain the lack of notification to you. Yes I believe all the B-bodies (probably D-body [Fleetwood] also) are the same AIR pump. I will still do some digging and maybe I can post a picture. Would you think Y and F cars would be the same AIR pump, or did they really screw the pooch on the C4?

[John G.]

Re: 93 secondary air inj pump

Terry, I'm most interested in function. Everything on this little unit is working (mostly). I noticed the on-unit fuse blown so I disassembled and found corrosion in motor. Cleaned and lubed, it does function; but the brush and springs are pretty bad.
Thanks
John G

[David H.]

Re: 93 secondary air inj pump

Joe

I think the AIR pump used on 92-93 LT-1 and 90-95 LT-5 were unique in that they were the only application that used the foam filter. Is that correct?

I believe you are correct.

While the 1992-93 Tech Manual has NO verbage specific to the LT-1 Air Pump, the Tech Manual text for the LT-5 notes the foam filter. The Tech Manual parts lists for the LT-1 and LT-5 Air Pumps are different (10090521/10092521), however, the part list shows the same part number (14104698) for the Secondary Air Injection Pump Duct (with foam filter).

The 1994-96 LT-1 and 1996 LT-4 Air Pump intake is routed to the air filter housing. The 1994-96 Tech Manual for the LT-5 continues to describe the foam filter on the intake duct.

[Terry M.]

Re: 93 secondary air inj pump

Let me see what I can find over the weekend. A lot of things are crowding in now, so no promises -- but I will get to it.

I note John H and Don G talking about the foam filter on the inlet. I know the pumps for the B-body (which are the ones I have) use an inlet duct to the vehicle air filter. However, that duct is separate from the pump. Whether that offers you a clue at to whether what I have would be useful to you or not, I don't know.