dumb question of the day...air pump

[cwiert]

I was looking at the air pump filter on the top of my radiator and quickly realized that there's no hose connecting the filter to anything (like the air pump, i'm assuming). So i just want to know, where is my missing hose supposed to go? where is the air pump? is this hose necessary...like something i need to address ASAP? can anything bad happen by not having this hose there?
thanks.

[MPDano]

Originally Posted by cwiert

I was looking at the air pump filter on the top of my radiator and quickly realized that there's no hose connecting the filter to anything (like the air pump, i'm assuming). So i just want to know, where is my missing hose supposed to go? where is the air pump? is this hose necessary...like something i need to address ASAP? can anything bad happen by not having this hose there?
thanks.

Does your state require smog? If so, the smog guy will inspect this and the pump better be there and the hoses hooked up, or it will fail visual.

You can pretty much follow a trail of smog stuff going from the pump and to other stuff along the passenger side, then kinda behind the passenger side of the rear area of engine. Some hook into the passenger side cylinder hear and some directly to the Cat.

Post up a pic of what is there now and we can tell you what is missing.

[cwiert]

Originally Posted by MPDano

Does your state require smog? If so, the smog guy will inspect this and the pump better be there and the hoses hooked up, or it will fail visual.

Post up a pic of what is there now and we can tell you what is missing.

We have emissions testing which i need to go have tested in the next 2 weeks. But there's no visual test. they just stick a sensor thing up the exhaust pipe and run the car to test emissions. Oh and they also do a gas cap check. But that's it.

I'll take some pics later on. I just saw that there was no hose coming off the filter, so thought that was strange. Then I searched and learned that apparently a lot of people remove the Air Pump all together (still not sure why). So I wonder if mine is still there or not. Maybe a PO removed it.

[MPDano]

Pic Pic Pic! Did you car pass smog recently? If it did, then you probably just need to look upstream and make sure you have no leaks.

Guess what? A pic would tell a thousand words.

[cwiert]

Originally Posted by MPDano

Pic Pic Pic! Did you car pass smog recently? If it did, then you probably just need to look upstream and make sure you have no leaks.

Guess what? A pic would tell a thousand words.

Conn doesn't have "smog" per say, we just have emissions tests. I just registered my car last week and they told me that that last time my car was tested was back in 2005. So it's due. I have a 30-day window to go get it tested. Like I said, no visual tests, just the tail pipe sniffer.

Yup... pics are coming... gimmie a sec.

[cwiert]

ok, i'm not sure what i was supposed to be taking pictures of, but i snapped a few around the engine bay. let me know if you want me to focus in on something more specific.

here's the air pump filter with no hose attached:


here's a pic from the other side looking down at my AC compressor that has no belt on it:


Here's something that i don't know what it is (red on it) that seems to be floating...not really attached sturdily to anything:


and here's 3 more random pics:

[stepson]

It doesn't appear that you have an accessory belt on either the air pump or AC compressor. The air pump, if functional on your car, would have a hose coming off the back side and running down along the passenger side cam cover to an "EGR" valve. From there would be a hose and piping going down to the catalytic convertor. The idea was to pump air directly into the cat for emissions purposes. If you have the original catalytic convertor, you probably will need that air pump to pass emissions. Air pumps are removed when new-style aftermarket cats are put on the cars due to the inherent horsepower drain. Check to see if you have an original cat.

[cwiert]

Originally Posted by stepson

It doesn't appear that you have an accessory belt on either the air pump or AC compressor. The air pump, if functional on your car, would have a hose coming off the back side and running down along the passenger side cam cover to an "EGR" valve. From there would be a hose and piping going down to the catalytic convertor. The idea was to pump air directly into the cat for emissions purposes. If you have the original catalytic convertor, you probably will need that air pump to pass emissions. Air pumps are removed when new-style aftermarket cats are put on the cars due to the inherent horsepower drain. Check to see if you have an original cat.

here's some more pics. do you see the air pump in the pics? how do i know if i have one installed? i do see a pipe going into the cat, and it's not connected to anything. so that's bad i guess. i took pics of that too.
so all in all, you don't like my chances of passing emissions, huh?

[MPDano]

Yup, that unconnected pipe is probably leaking exhaust through it unless it has a one-way valve of sorts. Can you hear anything coming out of it when the car is running.

I see yours is an S4, I was referencing an early car, but it's probably similar.

I do see the ac compressor not having a belt, so is ther another pump along the belt route that is also disconnected? If so, that would be your Air Pump.

[Normy]

The air pump is located just above your AC compressor. There should be about a 4 inch diameter V-belt pulley attached for its belt. It is probably frozen up, A PO simply removed the belt. You can see part of the bracket that supports it in your second picture; This bracket is angled, then curves, and the wiring harness passes [the heavy electrical cable] passes beneath it.

N

[76FJ55]

the smog pump can be seen in the lower left of this picture (picture from Dwayne's TB WP thread on RL).

[cwiert]

Ohhhh... I see now. I definitely don't have one of those pumps installed. Here's a pic. I guess that explains why I have no hose from the air pump filter...cause there's no air pump.
OK, so the million dollar question is this...This only effects emissions, right? Since I need to get my car tested for emissions in the next 2 weeks, is there anything I can do to improve my chances of passing? Gas additives? Oil additives? Anything?

[76FJ55]

The best thing you can do is make sure you get the cats good and hot before testing. take it out for a good run on the highway to get everything up to temp, then try to minimize cool down time before the test. Best of luck.

When I installed my X the original cats where removed so there was no longer a connection from the pump to the exhaust so my pump system is in the attic of the garage. Newer style aftermarket cats have no provision for the air pump attachment. I also live in Oklahoma. If you end up needing to reinstall the pump system let me know if I can help in any way. Mine is off my 85, but the pump and diverter is the same. The intake filter setup is different, and the lines to the cat are most likely different too, so those may or may not be adaptable.

[Opelotus]

Does anyone know what size belt I will need if I delete my air pump but keep the factory cooling fan? I know I have seen it done somewhere, but I do not recall where.

[stepson]

[QUOTE=Opelotus;5386536]Does anyone know what size belt I will need if I delete my air pump but keep the factory cooling fan? I know I have seen it done somewhere, but I do not recall where.[/QUOTE

Go the 928 web forum on RL and do a search for "belt for air pump delete" The second thread has the info you need.

[dcrasta]

Looking to drop the air pump (I did because I went with the Porkentensioner air pump delete bracket).

If your car has the Rear AC (mine did) the proper belt is a 20 inch belt (AL-200)

If you have no Rear AC proper belt is 21 inch belt

Granger has them for around 7 bucks.

U remove the Fan Bracket (3 bolts to the front of the WP), place the belt on the pulleys, and bolt the belt down, as you tighten the bracket the belt will tension.

My car 86.5 YMMV

[Opelotus]

Cool! Thanks for the info.

dcrasta, you have the 32 valve engine, am I correct? Either way, I think 20" or 21" sounds about right.

I can't wait to get an electric fan and forget about belts!

[cwiert]

Originally Posted by dcrasta

Looking to drop the air pump (I did because I went with the Porkentensioner air pump delete bracket).

If your car has the Rear AC (mine did) the proper belt is a 20 inch belt (AL-200)

If you have no Rear AC proper belt is 21 inch belt

Granger has them for around 7 bucks.

U remove the Fan Bracket (3 bolts to the front of the WP), place the belt on the pulleys, and bolt the belt down, as you tighten the bracket the belt will tension.

My car 86.5 YMMV

cool... i'm glad someone asked about the belt, because that was my next question. my car has the rear AC, so I guess I'm looking at the 20" belt. My car is a S4. Does that matter? Still 20" belt?

[stepson]

You don't have a viscous fan to replace on your '88, so you have no need to know this information.

[cwiert]

Originally Posted by stepson

You don't have a viscous fan to replace on your '88, so you have no need to know this information.

i mis-read the question. I need to know what size belt to get for my AC compressor. from what i understand, the original belt went around the ac compressor and the air pump. since i don't have an air pump anymore, i need a belt just to go around the AC compressor. Does anyone know what size belt I need?