Power Steering Pump Differences

[CalSgt]

From under showing the loops, I plan to tie both lines together once everything is finalized

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Underside showing how my lines hook up

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Top side showing the lines

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[CalSgt]

Talking with Dad he said some of the GMT400 trucks had variable steering of some sort. Those ones used a different fitting in the pump, he said if that’s part of your issue that the fittings in the pump are all interchangeable so you can swap it out for one with the other style fitting

 

[Doppleganger]

MAN is that close to the pulley - lol

I still have the end - going to see if there is someway to make it go. THX!

 

[CalSgt]

MAN is that close to the pulley - lol

I still have the end - going to see if there is someway to make it go. THX!

It’s not too bad, the belt is hanging loose right now

 

[CalSgt]

I’m assuming you have this pump, this is the pump from my BIL’s ‘97 I bought him when he turned 16. The extra electronics are for the variable steering pressure option which we deleted.

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Here is one like mine from one of our spare vortecs, the only difference is the fitting highlighted in orange which can be swapped out with just about any other GM pump.

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And here is a better shot of the pulley clearance, almost two fingers worth. I have big hands BTW. It’s a long ways away on the back side.

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[Doppleganger]

Thanks for the pics @CalSgt - cant take a pic of mine because I completely removed the left side accessory bracket (to get a better look at it). The return line tube hits the pressure hose but I think can be tweaked a bit out of the way. Thats the plan ATM anyways.

Does that bracket on the back have any purpose?

 

[mtbadbob]

I can’t remember what I did but it wasn’t very complicated IIRC.

I’ll get some pictures in a bit.

Also, the GMT400 has the gear box inside the frame because the frame is about a foot wider than the squares. Square has narrow frame & saddle bag gas tanks, late 90’s had a great big tank inside the frame rail, and 4x4 IFS needed the wider frame so the control arms would not be too long.

I also believe that the class action lawsuit against GM in regards to the exploding fuel tank upon a massive side impact contributed to that frame change & fuel tank re-location.

 

[CalSgt]

Does that bracket on the back have any purpose?

IDK I think it is kinda like the rear bracket on the alternator, takes some of the stress off of the aluminum and keeps it from twisting.

 

[bucket]

IDK I think it is kinda like the rear bracket on the alternator, takes some of the stress off of the aluminum and keeps it from twisting.

Yep.

In order to do intake gaskets on a vortec engine, you have to remove the bolts from the accessory bracket and slide it away from the engine, which involves loosening that support bracket. Many times I've done intake gaskets, that support bracket was already loose from someone messing with it in the past. I've never seen any damage from that bracket being loose, so it must be fine to run without it.

 

[Doppleganger]

Yep.

In order to do intake gaskets on a vortec engine, you have to remove the bolts from the accessory bracket and slide it away from the engine, which involves loosening that support bracket. Many times I've done intake gaskets, that support bracket was already loose from someone messing with it in the past. I've never seen any damage from that bracket being loose, so it must be fine to run without it.

Its got that goofy U shaped piece that looks like it needs a hose to hold on to (sounds kinky). Just looks in the way to me. I wont use it but wont toss it either.

THX

 

[bucket]

Its got that goofy U shaped piece that looks like it needs a hose to hold on to (sounds kinky). Just looks in the way to me. I wont use it but wont toss it either.

THX

Oh, that one down at the bottom? I actually don't recall what that one does. But the one up higher, it's just a slotted mount so it can be removed by just loosening the bolt. It's not easy to access in an Express or Astro.

 

[CalSgt]

Its got that goofy U shaped piece that looks like it needs a hose to hold on to (sounds kinky). Just looks in the way to me. I wont use it but wont toss it either.

THX

Not sure I’m tracking on the U shaped part, are you talking about one of these?

The top one bolts to the block just below the head, the lower one bolts to the front of the block just above the pan rail.

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The orange circle is where the U bracket bolts and the green one is where the aluminum bracket bolts

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[Doppleganger]

Not sure I’m tracking on the U shaped part, are you talking about one of these?

The top one bolts to the block just below the head, the lower one bolts to the front of the block just above the pan rail.

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The orange circle is where the U bracket bolts and the green one is where the aluminum bracket bolts

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Yep.

 

[bucket]

Not sure I’m tracking on the U shaped part, are you talking about one of these?

The top one bolts to the block just below the head, the lower one bolts to the front of the block just above the pan rail.

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The orange circle is where the U bracket bolts and the green one is where the aluminum bracket bolts

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Yeah, I don't remember that lower part of the mount. Been out of the game for nearly 10 years now, guess I'm starting to forget some things I used to know.

 

[CalSgt]

Yeah, I don't remember that lower part of the mount. Been out of the game for nearly 10 years now, guess I'm starting to forget some things I used to know.

LOL... It's like riding a bike Sir, I'm sure you would go straight to work and not even think about every detail because it would be automatic.