Piece of cake, although wil L56 you will have to do something about the vacuum needs of the EGR, or perhaps you already have a new prom, L65 Prom or whatever.

At any rate, the whole procedure is done from the top of the engine, front of the truck.

Take of the belt tension, I think an 18 mm wrench to rotate the idler pulley, then I remove the AC compressor, just remove the 3 inner bolts in the front face of the compressor, it's directly above the vacuum pump, and makes it easier to see. Dont remove any lines from the AC compressor, just the 3 bolts and set it off to the side toward the air box.

I also took off my upper fan shroud, probably not necessary, but is held on with a few 10 mm bolts all easily accessible, simple to remove and just gives a bit more room to get your elbows down there, also a good time to check for crap in between the rad and AC condensor.

There are 3 bolts that hold the vac pump bracket to the block, 15 mm I think, 2 are easy to see and remove, and the third is too, there are holes in the pulley that allow a socket to pass through to get that one.

That's pretty much it, disconnect the vacuum line that runs up between the AC compressor and the block.

Then let me know if you want to sell the pump, if it works that is, and if it's cheap, I'm not in need of one, except for a spare.

 

I have a vacuum pump that is off my truck and works perfectly. PM me if you want it.

 

Chickenhunterbob,

Thanks so much for the response. That'll help a bunch.

BTW, are we related?

 

Just FYI, My '94 may have been the bast@rd from the factory, when I removed mine, one of those three 15 mm bolts was put in from the backside.

 

Yacht, same as mine. I had to remove the AC compressor and then remove the bracket to get the vacuum pump off.

Of course, it's still not put back together....3 weeks later. *Tear*

 

Yep that sounds like the process. I had mine off when I replaced my water pump with the HO one. It just about killed me to bolt it back up. Only now I don't think I will have to take the AC off since I've been there and know where the bolts are. Can't wait for that chip so I can get rid of that pump.

 

I finished the vacuum pump removal and managed to turn a 15 minute job into a 5 hour pain in the butt. Anyone searching threads for advise, I used Chickenhunterbob's advise and built on it a bit. Some of the bolts were amazingly tight...not rusted, just over-driven at the factory. God, I hope we never piss you Canadians off enough to make you cross the border. My luck, Goliath the Bolt Tightener would be assigned my neighborhood. Anyway:


Remove the upper fan shroud, held on with seven 10 mm bolts – three on top and two each side on the back corners. A very long extension for your sockets will be helpful.

Use an 18 mm socket and a breaker bar to rotate the idler clockwise and remove the pulley.

Detach the AC compressor by removing the 15 mm three bolts on the front face of the compressor. There’s one bolt with a thick steel washer at the 1 o’clock position and two others going through the stamped steel bracket – one at the 8 o’clock position and another at the 5 o’clock position. Don’t remove any lines from the AC compressor - just the 3 bolts and set it off to the side toward the air box or tape it to the battery with some strapping tape.

At this point, you should be able to see clearly the three 10 mm bolts that hold the vacuum pump to the bracket. If you’re one of the unlucky that has the lower right bolt coming in from the back, start removing the two 15 mm nuts on the studs attached to the block that hold on the bracket as well as the one that goes through the attached sleeve spacer butted to the bracket between the AC compressor and the block. If all three bolts are accessible from the front (with the lower right bolt accessible through a hole in the pulley), snatch that thing off and feel blessed.

Check for crap in between the radiator and AC condenser.

Disconnect the vacuum line that runs up between the AC compressor and the block and reattach the AC compressor and shroud.

By the way, a 100” belt wouldn’t fit but a 101” worked fine.

 

I just got around to taking mine off last week. I took the one that goes in from the back first from underneath. Then the other two.

 

Chickenhunterbob,

If you really want that pump, PM me. It was working fine when removed.
All I want for it is cost of shipping. You can mail me a check upon receipt.

 

Nice crewcab in yer avatar, Radrick................

 

That's what I was thinking. Hey, I've got an outhouse that matches that you can use as a camper.

 

 

ok here goes

1. take off belt take out the four bolts that hold the ac compressor and put in out the way think these are the 15 mm bolts
2. then remove the 10 mm bolts from the front of the vac pump the third is on the back side towards the bottom
3. fish out the vac pump and do step one back wards

 

Ok, so I'm pedantic. Or at least that's what I'd like you to think but the truth is that I'm not to bright. I cut myself on the vacuum pump bracket on two fingers over a dozen times. How do you explain that with any dignity? I have no learning curve. Maybe is CHB had added, "Don't keep cutting yourself on the vacuum pump bracket...." I wouldn't have these bandaids on.

 

Now I don't feel so bad after my experience pulling the fender-well out.

However, I'm surprised the stores have bandaids back in stock so soon!

 

Hey to expand on this my 95 is on the list to remove the VP. Already got the TM and Heath Eprom plus EGR manifold went bye bye but my question is I know I read somewhere here about once removing the vac pump the shorter belt chirps ? Anyone confirm or deny this ? I'll leave mine in place if that's the case or make an idler.

 

my question is I know I read somewhere here about once removing the vac pump the shorter belt chirps ? Anyone confirm or deny this ? I'll leave mine in place if that's the case or make an idler.

As I recall, mine chirped. But I made a 600 mile round trip the following day, and it didnt chirp after that. FWIW, Perhaps the new belt just needs to be "run in" a bit to quiet down.

 

when i done mine i got the 2 easy bolts out first then took a chisel and busted the pot-metal boss and it fell to the ground...10 min's tops...mine was dead so i did care about..

 

...then took a chisel and busted the pot-metal boss and it fell to the ground....

My, I bet that was satisfying. I've done some fine self-therapy with a 4.5" grinder and I also prefer my bolt cutters over blood pressure medicine.