anyone got a twin groove pully for A/C

[RallyBob]

Originally Posted by tekenaar Had to rethink the whole thing a bit, as I said, but if the offer is still good, here's a drawing of the driver side compressor bracket. Not drawn to scale (couldn't find a "grid" in Paint!), but all the dimensions listed are accurate. The 2.675" dimension between the back sides of the pivot arms is the most critical as pump arms will mount to it from the rear. Mocked pump up to run off front pulley on driver's side and will have to fab passenger side alternator bracket as well. Up for that one too?

Looks simple enough, and I happen to have some 3/8" thick 6061 aluminum laying around too. Let me know what the second bracket will be, it's easier to make 'em both at the same time.

Bob

[Sportwagon75]

Otto - You might want to check out the following thread.
http://opelgt.com/forums/showthread....ht=Manta+A%2FC
It has some good food for thought. GTJIM in New Zealand sent me one of his home made multi-V pulleys that he fabricated for Opel engines. There are pix of it in the thread. I think he may have more. You may also get some ideas for using the very small Sanden compressor I referenced in the thread. There's even a photo of it with mounting hardware for a SB Chevy. It's also available in twin groove format. It works very well in my little 3-cylinder Geo Metro and all the parts are very small. Just some food for thought.

[Paul]

So that's what this funny looking pulley is for...

[nobody]

Yes Paul, I had an idea from the beginning to move it closer to who needed it.

[tekenaar]

Originally Posted by Sportwagon75 Otto - You might want to check out the following thread. http://opelgt.com/forums/showthread....ht=Manta+A%2FC It has some good food for thought. GTJIM in New Zealand sent me one of his home made multi-V pulleys that he fabricated for Opel engines. There are pix of it in the thread. I think he may have more. You may also get some ideas for using the very small Sanden compressor I referenced in the thread. There's even a photo of it with mounting hardware for a SB Chevy. It's also available in twin groove format. It works very well in my little 3-cylinder Geo Metro and all the parts are very small. Just some food for thought.

Checked it out many moons ago and had already copied pics and specs for future reference.

My little Nippodenso unit is very similar to that Sanden unit, size-wise . . . ~1/2" larger diameter is all and with a single V-belt pulley. Bet he didn't get his for $15 though . . .

[tekenaar]

Originally Posted by oldopelguy One other issue of concern in the Kadett with AC was the fan. The 1.9 motor is so close to the radiator that you can't space it forward to clear the pulley like the Manta and GT, instead they cut away the rear 1/2" of the fan instead to clear the pully. Doing it and keeping it balanced is a real chore if you have to do it to one yourself. Do yourself a favor and start out with a 7-blade one, though, to keep as much fan as you can. To top it all off, the condenser sits right up against the support brace in the front, so no room for a "normal-sized" electric fan on the front either.

Currently my 1.9 uses a 5-bladed fan which has a measured ~1" frontal blade clearance to radiator's bottom tank lip, most rearward frontal fan obstruction. The 5-bladed WP fan mounts ~3/8" further forward (toward radiator, more crank pulley clearance) than the 7-blade fan, in case you're curious.

My WP fan clearance mockup is based on a 7-blade fan and an 11/16" spacer I had, mounted between the stock WP pulley and 7-blade fan. This results in ~3/16" clearance on both sides of the fan blade's closest obstructions . . . tight, but enough running clearance and I can use the full 360mm diameter of the fan without any blade modifications!

Rear V-belt will drive the WP and relocated alternator, front V-belt will only drive the A/C compressor on the driver side. WP radiator hose will be routed around the back of and under the alternator to the radiator. GT ARA A/C systems used a cast aluminum piece for lower radiator coolant routing with their twin piston compressor, which I will use to route coolant around passenger side mounted alternator. There's a bit more room to do this in a Kadett than in a GT . . .

[tekenaar]

Originally Posted by Paul So that's what this funny looking pulley is for...

Paul,
Could you box the pulley up and parcel post it to me? My snail mail address is:

Otto Bartsch
P.O. Box 860608
Plano, TX 75086-0608

I'll send you something for your daughter's car's ignition switch, per Dave's earlier suggestion. Send me your snail mail address so I can get it underway.

[Paul]

Otto,

Sure thing. My address

Paul Crane
4814 Mount Zion Rd
Greenwood, AR 72936

However, I fly to St Louis at 630am Monday and dont get back until Thursday night. So I might not get in the mail until Friday. Hope that's not a problem.

[tekenaar]

Originally Posted by Paul Otto, Sure thing. My address Paul Crane 4814 Mount Zion Rd Greenwood, AR 72936 However, I fly to St Louis at 630am Monday and dont get back until Thursday night. So I might not get in the mail until Friday. Hope that's not a problem.

Not a problem, Paul. Yours is on the way today and should be there by Thursday.

Would you, or anyone else reading this, have an extra 1.9 aluminum alternator bracket and an unmodified stock 7-blade WP fan? I have two fans, but both were pretty severely butchered by POs, so really no good for anything but measuring clearances.

Another thing I'll need (I thought I had another but can't find it) is the cast aluminum coolant duct that was used with ARA A/C systems and mounts between the WP and lower radiator coolant outlet with two hose pieces, see pic. I'll need this to reroute the lower radiator coolant hose around the repositioned alternator on the passenger side.

[jordan]

I have an unmodified alt. bracket and a 7 blade fan

[GTJIM]

Originally Posted by tekenaar Checked it out many moons ago and had already copied pics and specs for future reference. My little Nippodenso unit is very similar to that Sanden unit, size-wise . . . ~1/2" larger diameter is all and with a single V-belt pulley. Bet he didn't get his for $15 though . . .

The new Sanden a/c compressor cost me $109 and I am still fluffing about with a low mount above the oil filter. BTW: the micro groove pulley that I made up turned out to be a different pitch to the Sanden compressor pulley so I have to go back to the drawing board ...... There is a single vee groove clutch pulley available for the Sanden compressors.
Here is a pic of the base plate I have made up that bolts to the three 10mm holes on the side of the block above the oil filter. The "notch" is to clear the oil pressure relief valve in the front cover.

[RallyBob]

Originally Posted by tekenaar Would you, or anyone else reading this, have an extra 1.9 aluminum alternator bracket and an unmodified stock 7-blade WP fan?

Otto, don't forget there are at least three different types of aluminum alternator brackets (plus the older cast iron brackets) There's the 'thin' style that is very prone to cracking, then there are the thicker-section pieces, and of those there are two offsets (away from the side of the block, not fore-aft). This fact used to really mess me up swapping stuff out when I'd try a fan belt and it wouldn't fit because of a longer bracket!

Bob

[Paul]

Otto,

I didn't realize it but I actually had a later flight, so I did get your pulley in the mail. I have that lower radiator hose of which you speak. I have a spare alt bracket too. But I'm in St Loius until Thursday late.

[tekenaar]

Originally Posted by RallyBob Otto, don't forget there are at least three different types of aluminum alternator brackets (plus the older cast iron brackets) There's the 'thin' style that is very prone to cracking, then there are the thicker-section pieces, and of those there are two offsets (away from the side of the block, not fore-aft). This fact used to really mess me up swapping stuff out when I'd try a fan belt and it wouldn't fit because of a longer bracket! Bob

Hmmmm, didn't realize that . . . guess I've been lucky. Got any offset measurements, Bob? Been doing some more trial fitting and may be able to get by with modifying 2 stock aluminum alternator brackets if I mount the alternator upside down on the passenger side. Have to do some more detailed measurements, but I'll let everyone know how mock-ups turned out. Back to work . . .

[tekenaar]

Received Dave's dual crank pulley in the mail from Paul . . . thanks to both.

Had assumed that dual crank pulley was just a second pulley in front of the standard single crank pulley . . . WRONG! The WP/alternator drive pulley is moved forward by 5mm and the compressor drive pulley is mounted to the rear of it. Thought it was a bit odd that they changed the standard belt path of the single pulley, requiring spacers for both alternator and WP. So, just to save everyone else looking at this some time, let me recap what I've found, at least what's used for "stock" A/C mounting.

When I checked my pictorial parts manual, sure enough, WP and alternator drive spacers were used on both the Kadett and 1900/Manta. They don't show any ARA stuff, BTW, so that was strictly a "dealer select" option. Kadett mounts the GM compressor up high on driver side, much like the GT, while the 1900/Manta mounts it low on the passenger side right next to the oil filter, but they both use the same pulley and WP/alternator spacers according to the parts manual.

This changes all my previously measured mounting locations, so it's back to the drawing board for me. Soon as I have some new measurements, I'll post here. Thanks to all who are providing bits and pieces for this. Hope to arrive at a general installation guide with critical measurements for using a Sanden/Nippodenso 10-piston type compressor, the most commonly used one, for A/C conversion.

[tekenaar]

Some background. Saved a complete dealer's A/C installation instruction for 1900/Manta for '72-'75. This has templates for cutouts and everything. Also has detailed list of parts needed complete with pics of those parts. Don't know why I didn't go there first!

Here's my quandry . . . the dual crank pulley shown has the WP/alternator driven off the rear pulley and the WP spacer is used between the pulley and the fan blade to clear the front crank pulley (stock belt path is unchanged)! Looks like my original assumptions (added pulley at front of crank pulley, same belt path for WP/alt) were correct after all!

Figured out where the dual pulley Dave sent was used . . . to drive the 1969 1.9 AIR pump. Thought it was odd that the stock belt path was moved forward and that the pulleys were different size. Anyway, looks like I'm STILL looking for an A/C dual crank pulley . . . P/N 3032075 according to parts book and dealer A/C installation instructions. HELP!!

Bob, Gene, could you verify your dual crank pulleys have both drive pulleys the same size?

[nobody]

I was curious where it came from when I first saw it. I asked who I got it from and he said it was on his green 73 wagon with AC he parted out. He also had the condensors for both GT and Wagon so I figured he was right. Sorry if it's wrong.

[greensmurf20]

a local has a 72GT thats an automatic with air conditioning. the crank pully has the same sized pullys on it. it uses the air conditioning system where the compressor is on the drivers side of the engine if its of any signifficant value of information.