Hello all.

A long time ago one of the first things I did was eliminate all or as much of the associated rails and tubing coming from the aux air pump - while leaving the pump and pully for the AC... Recently, as a part of doing a whole bunch of other stuff (installing an alternator being one), I removed the pump completely on the IDEA that I would simply come back to the forum and get the part number provided by a great JForum contributor about a shorter belt that could be used in place of the longer 3 pully belt. For the LIFE of me I cannot find that thread or that part number, of course, lol

Does anyone know the part number, correct length or brand (I thought it was a Napa part) for the shorter belt one might use that give a straight shot to drive the AC compressor off the crank pully? Is there a size belt I could chase down? I really thought remembered someone offering that info here while back.

As always, any leads or direction is super duper appreciated...

PS... Building a back deck, with hinged lid, for the old girl now. No small thing AND, I learned, I am NOOO Carpenter, lol


Got a nice set O new carpets and seat upholstery going in now... yup,,, is much much worse than it looks! lol

 

Is it even doable that way?

Foggy memory disclosure here, but I don't think there's a clear path to simply install a shorter belt. I'm thinking that anyone who has removed the Air Pump has used the idler/jockey pulley set-up, as used by Jaguar.

Cheers
DD

 

Here's an illustration of the idle pulley set-up as used on cars with the air injection pump

https://www.jaguarclassicparts.com/u...ment-5-3-litre

Cheers
DD

 

Hi Doug.

I've heard folks talking about gutting the pump and using the pully, then, the whole replacement pulley as sold by Jaguar. It costs a buck or two, I know that. Checked.

In that, a member chimed in and said that he had replaced the pulley set up with an up and down belt that went straight from the crank pully to the AC.

If I look down over the AC pulley, down in the direction of the crank and balancer pulley. It's a clear and straight shot, on both sides, down and around. Just have to remove all belts in the change as the AC belt is the last runner in on the crank pulley...

Then again,,, I could have gotten the signals crossed and am confused. To me, it looks doable as long as the right length belt is used.

 

I'm at work now,,, but will take a closer and second look later and report back. If in fact it does seem like a clear run down both sides - I came across this. Thing is, on pulley side, in this video, I wonder if the depth of the the "V" was considered?

It should get me in the right ball park, no matter.

The video is long,,, but worth it I think...

 

So, I am pleased... This is what I am looking at. Still could be disproven but I remain optimistic... Looks good.

These first 3

These first 3

These first 3 are from the side in question. I wrapped a wire to gauge whether or not I can do it... Still don't KNOW... The last is from the side (DS - LHD) that I know will fit.

LHD - DS

 

I guess what I'll need to find (or need help with) is the diameter of the A6 and crank pulleys, both...

Anyone have numbers. It's situations like this that I don't trust the Google-Verse... Nothing like the experience of the folks here.

 

I think most A6 compressors had a 5.75" pulley. No idea on crank pulley.

Not much help, sorry.

Use a string to get a rough measurement. Buy 3-4 belts close to that size, some longer, some shorter. See which gives the best fit, A hassle, yes, since the compressor will need to be loosened each time to install the belt. Allow for inevitable belt stretch by going a with a belt that's initially a bit too tight.

Cheers
DD

 

It is do-able, JJJ. It is just a question of getting the right length! Of course, to fit it you must loosen off the compressor and tilt it forward and downward to install the belt. And when/if the belt expands a bit, there is no way of adjusting it.

 

Hey Doug! Hey Greg!

Smallest belt I can get on the thing without tooooo much tension (forget that formula - even though I think it's awesome) and I am willing and happy to struggle a few hours with the off and on and belts,,, so long as it can mean I will have the option of AC... Had this one working for a little while, could see my breath in the air stream.

Thank you both so much.
Hopefully,,, a little down the road I'll come back with some good news!

 

https://www.jaguarforums.com/forum/x...he-v12-164829/

 

Tension depends on temperature, too. BTW, kevlar belts shrink when temperature rises. I prefer to have some sort of roller there for adjusting.

 

Hey xjsv12... What's up.

Thanks for the link. I will write to it with hopes of getting Grant to notice the old thread and chime in.

I am very interested in the Sanden Compressor... I would also be very interested in changing the hoses from the pressure fit design on the A6 I have to a threaded set up for the hi and low pressure hoses... What needs to happen to have threaded hose fittings on the compressor end of those hoses? Is there a fitting or a whole other hose? Either way. Do you have part numbers?

I tried to rebuild my A6... When replaced, I filled and ran it (long story) it pumped out very VERY cold air. I was surprised. Sadly, it was short lived... I *think* it's the source of my leaking AC. I will need to replace the compressor unit and if i CAN buy a Sanden Compressor (or some other smaller and more modern) I would love to do that now. Will just need a bit of direction...?

Anyone have a simple, clear and relatively inexpensive play by play on going from the A6 tank to a slimmer smaller Sanden? I am willing to buy new hoses,,, but don't know how to find hoses with 2 threaded ends that will work on the car.

 

For the Sanden sd7b10 unit,,, to get it hooked up,,, is it really as simple as finding a set like this or similar and bringing it to a hydrolic shop? Purchase a set of Jag hoses, have the shop cut and use them as a replacement?

https://www.ebay.com/i/223588231480?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=223588231480&targetid=53917454295 5&device=m&mktype=pla&googleloc=9004148&poi=&campa ignid=1881303832&mkgroupid=65519987730&rlsatarget= aud-762207186714la-539174542955&abcId=1139336&merchantid=6296724&gcli d=CjwKCAjwm4rqBRBUEiwAwaWjjDX5uyfyl3rtXqTBamgaeKUA NcnzxbtR_V9UMs2csn6aQamPbaHIhhoCyg8QAvD_BwE

 

There is a writing about this in Kirby Palm's book.

 

Umm... That's great to know, Seg. Thanks!

 

Yes and no. The aircon does not know or mind which make of compressor. The only difficulty is plumbing the Sanden into the hoses without fouling either the bonnet or the cruise control stuff. I would go to a decent aircon place and ask if they can make up hoses, most can. Then see what they recommend is done to enable the Sanden to be fitted.