04 2.0 Air Con can it be bypassed ? - konrose
2.0 D4D model.

Does anyone know, if the air con can be bypassed ?

My aircon compressor is "rattling" on idle, but if I turn on the aircon the "rattling" stops.
My mechanic tells me that its something to do with the pulley/ flanges on the aircon unit and the clutch mechanism then cuts out the rattling when it has "engaged".

I have tried locally and found that this is a sealed unit and the pulley/flange that I require cannot be bought seperately.
Toyota Dealer are quoting £800 + VAT for it, then theres the re-charging of the system and the mechanics time for fitting it.
I have found it practically impossible to locate a secondhand unit.

What I am trying to find out is ; Can the belt be replaced with a belt for a non-aircon engine ? (obviously the pulley of the aircon unit may have to be removed) and is it as straightforward as it sounds ?

Does anyone have any diagrams showing the differences in the belt layout ?
04 2.0 Air Con can it be bypassed ? - big davey
HI,
If your model comes without air con, you should be able to take off the compressor and find out what size belt was fitted to the non air con model and fit it. You may even get away with leaving on the compressor on if its not in the way of the new belt.
04 2.0 Air Con can it be bypassed ? - konrose
OK Thanks Big Davey.

If the compressor is taken off will it affect engine management system do you know?
04 2.0 Air Con can it be bypassed ? - jimbano
Hi,

If you just want to run the car without air con, why not just leave the air con compressor on the car without disconnecting anything.

I would imagine if you just remove the ribbed belt and replace with a new ribbed belt that would normally be used for cars without air con. You should be able to purchase one of these for a few quid at your local motor factor and i don't envisage any problems that could happen.. all you are doing is leaving the air con pulley out of the equation.

This way your not paying anyone to De-gas the system and if it doe'snt work, just put the old belt back on.

Hope this helps
04 2.0 Air Con can it be bypassed ? - Dynamic Dave
My aircon compressor is "rattling" on idle but if I turn on the aircon the "rattling" stops.


Simplest solution then would be to leave the AC on all the time. If you had climate control it would be on all the time unless you switched to 'eco' mode.
04 2.0 Air Con can it be bypassed ? - cheddar
I agree with DD, options in order of preference:

1/ Leave the aircon on auto or on all of the time if manual.

2/ Put up with the rattle.

3/ Get it fixed.

After all it is useful in summer and winter (demist) and being u/s will devalue the car.
04 2.0 Air Con can it be bypassed ? - kithmo
Simplest solution then would be to leave the AC on all the time. If you
had climate control it would be on all the time unless you switched to 'eco'
mode.

But it would still rattle when the compressor cuts out.
04 2.0 Air Con can it be bypassed ? - konrose
Just an update - It can be bypassed.

the air con compressor was left in place and a different size belt was fitted. The car still runs perfect and I dont notice any difference without aircon - apart from having to wait a few minutes longer for demisting - but hey thats somethng I can live with !

In your post above you mentioned devaluing the car - I had thought about that - but when I went enquiring I found I had lost £5k in 2 years anyway so I dont think I can loss much more - anyway the car is worth more to me operating it that trading it in - so another MOT has just been passed - £145 for 2 tyres and a checkover - another happy year of Toyota motoring !!

Edited by konrose on 04/02/2009 at 00:32

04 2.0 Air Con can it be bypassed ? - Woodspeed
Worth checking an indy air con specialist. Friend had a compressor for a Lexus overhauled and was only £200. Toyota wanted over £800 !
04 2.0 Air Con can it be bypassed ? - avensis54
Hi
I have been reading you posts and seem quite interesting as I currently have the same problem with a 2004/54 D4D T2, think i should do the same thing. The question that I have is that how do u know what size belt to use as I dnt think these cars come without aircon and also does it effect the engine in anyway/how r u finding?
Many thanks
04 2.0 Air Con can it be bypassed ? - gleno74
Hi Konrose
Can you tell me what size belt you got to bypass the a/c on the avensis?
Any info would be greatly appreciated..

Snipquote - last time I checked, the pop up request asking NOT to repeat everything, but to snip and summarise was still working. I'm surprised you didn't see it?

Edited by Dynamic Dave on 16/07/2009 at 01:17

04 2.0 Air Con can it be bypassed ? - datostar
You're lucky. When the compressor seized on my Megane RXE 2.0 it cost me an arm and a leg for a new compressor, belts etc. There was no equivalent model without aircon and we couldn't find a shorter belt to bypass the compressor. There's companies in the US that sell aircon bypass pulleys to solve this problem. It's an idler pulley with a mount that replaces the faulty compressor enabling use of the existing belt. Surprised it hasn't caught on here yet with the growing number of cars with aircon. They are available for some European cars commonly exported to the US and for anyone with this problem who can't find a suitable belt it might be worth googling for the US suppliers. I certainly would have paid for the shipping etc. if there'd been a pulley available for mine.
04 2.0 Air Con can it be bypassed ? - nuunaa
I have just read your thread and thought id written it myself - I have exactly the same problem on the same model as you - have been quoted £700 plus to have the air con compressor replaced - reading your thread does the air con still work even after disconnecting? The rattle is beginning to get really annoying!
04 2.0 Air Con can it be bypassed ? - Dynamic Dave
reading your thread does the air con still work even after disconnecting?


No it wouldn't, as a shorter belt has been fitted which no longer turns the compressor - the item which was making the noise.
04 2.0 Air Con can it be bypassed ? - piston power
Seen quite a few companies on the net offering parts second hand parts direct from japan, can't you get a compressor from one of these places?

There is plenty of these used as taxi's around here have you looked at a jap specialist in the uk?

I wouldn't pay dealer price either and as for you value loss im in the same boat! lol....
04 2.0 Air Con can it be bypassed ? - kithmo
Is it not possible to repair/overhaul the clutch/pulley on these, surely it can be taken off and shimmed up or something (unless it's broken of course).
04 2.0 Air Con can it be bypassed ? - 2wheelsarebest
Hi there,

I can report good news to all those like myself - short of money! - I was quoted £814+VAT for a new air con compressor, for a car worth around £3,500 at best. Fortunately the same chap in the parts dept at Toyota also quoted me £25 for a belt that bypasses the air con, going round the crank and power steering pulleys. All cars in the UK have air con, but apparently somewhere else in europe they dont - thank goodness! The best £25 I have ever spent. I will now buy another Toyota.
04 2.0 Air Con can it be bypassed ? - izziefin
2.0 D4D model. Does anyone know, if the air con can be bypassed ? My aircon compressor is "rattling" on idle, but if I turn on the aircon the "rattling" stops. My mechanic tells me that its something to do with the pulley/ flanges on the aircon unit and the clutch mechanism then cuts out the rattling when it has "engaged". I have tried locally and found that this is a sealed unit and the pulley/flange that I require cannot be bought seperately. Toyota Dealer are quoting £800 + VAT for it, then theres the re-charging of the system and the mechanics time for fitting it. I have found it practically impossible to locate a secondhand unit. What I am trying to find out is ; Can the belt be replaced with a belt for a non-aircon engine ? (obviously the pulley of the aircon unit may have to be removed) and is it as straightforward as it sounds ? Does anyone have any diagrams showing the differences in the belt layout ?

 

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