R32 Aircon Compressor

[Bl4cK32]

Motor is a rb30det in a r32 gtst. Car runs pfc, 550cc inj. Q45 afm.....etc

Ok symptoms:

-Aircon just blows hot air, no matter what setting.

-Aircon Compressor makes bad whirring /rotating niose when aircon switched on

-Pulley looks to be vibrating slightly as it spins

-idle drops as it struggles to keep car idling

Does this sound like a bearing or something on the pulley thats probably shat it?

Or would it be something else on the front of the aircon, like the windings? Car hasnt blown any fuses though....

Looks easy to get at the windings here: http://translate.google.com/translate?u=ht...Flanguage_tools

Anyone know what parts stuffed? The compressor, the clutch, windings, or the pulley?

Aircon wasnt touched when the 3lt went in, it was left connected, so i assume its got gas in it still...

I cant run the aircon diagnostics on the Pfc as well...i guess it wont run with the std ecu either as it has the 550cc inj, and q45 afm on it atm as well...

Any ideas?

Edited November 18, 2005 by Bl4cK32

[blind_elk]

Air Con has its own diagnostics.

Make sure the system has gas, never assume.

Are you running the standard engine cooling fan? The A/C radiator needs air flow to help cool the gas.

[AntonRx7]

looks at the air con diagnostics under the gtr service manual. you hold the off button for a few seconds after turning the ignition on. Not that doing this is going to find your problem though

[foznice]

with it only ever blowing hot air, is this something that only started recently, or every since you've owned the car? My 32gtst was imported a few months back and came over with this problem, as have have many other 32 owners I have spoken to.

There was a thread in the vic section a while back, where someone said that there is a plug behind the stereo/climate control, that isn't plugged into another plug.. which supposedly causes the hot air...

My situation: I bought the car knowing that 'AC compressor not good'.. when the car came over and I got to see it in the flesh, I noticed that for starters there was no belt running around the compressor and idler, and that where it connected to the crank pulley, there was a shitload of cooked rubber.... Upon further inspection, I noticed that the compressor span very freely (and looks like it has been replaced not too long ago after looking underneath the car).. but the idler had seized up... So I took the new idler off, popped out the old, seized bearing and got a new one for six dollars.. now the idlers back in and I've bought a belt but haven't put it on yet.. as I need to clean all that cooked rubber off the crank pulley with paint stripper... Upon taking the center console surround off, I noticed that there where several plugs that were unplugged and I couldn't find anything else (except for a few days later when I found it under the dash...grr).. I also noticed that an actuator seemed to be disconnected... SO this may well be the reason for the hot air...

Not this week, but the next, I'll have the belt back on and the system regassed, and I'll check plugs and stuff behind the dash.. I'll post back here if I remember..

In my case also, even when the climate control unit is turned off, freakin hot air still blows in.. To prevent this I leave the climate control off, but turn the recircultion thingy on and then wind the windows down.. So all air from outside is closed off at least...

[The Dan]

I got a tenna on a siezed or about to seize compressor or buggered clutch. A/C diagnostics on the climate control aren't gonna tell you what's wrong. Take it to a mechanic or auto leccy who can look at it and then you'll know for sure.

No seriously, I haven't got a tenna.

[Bl4cK32]

Its only started to blow hot recently...

I did the aircon diagnostics mode (first time in the shade...duh )

I got everything ok. the sensors measured 30.4 / 34.5 / 26 / 24.5 the last two temps were going up, after i did the test again in the full sun...

I have to agree with 3lit3 3. Its got to be something to do with the actual compressor or clutch....

How do i tell which one?

[The Dan]

When it is making the noise I assume it is coming from the compressor area. Get someone to switch the aircon on and off and watch the clutch on the front engage and disengage. The clutch will make a jingly rattle like bells when it is buggered. The compressor bearing or compressor itself will make a more grinding noise when it is buggered. I hope you can appreciate that it is a difficult thing to explain diagnose it. You kinda have to know what you are looking at. If the clutch itself looks to be vibrating like you say then that will be your problem and it can be replaced. If the pulley is what is vibrating then it is possible that the compressor has the fault.

Hope this helps.

[B0oStEr]

The front of the pulley appears to wobble because there is a triangular plate on the front of it.

If the idle drops when it's on then the clutch windings aren't burnt out.

Depending on how bad the compressor noises are I'd say it's the most likely problem although mine rattles and whirs a bit and it still works well.

If you've had the centre console off lately make sure the cabin temp sensor hose was reconnected to the vent and the wiring plug was reconnected.

Mine was accidently left disconnected and the a/c only blew hot air until it was fixed.

[Bl4cK32]

Yes the idle drops when i put the air con on.

The noises are pretty bad...bad enought to say sheit that dont sound good...even from inside the car.

All hoses are connected (i always make sure to reconnnect stuff as i put it back toegether )

So i guess that means its the compressor? Do i have to remove the whole thing?

What would be better - getting this one rebuilt, or putting a second hand one on?

[The Dan]

No, it means you take it to someone to have it diagnosed properly, then once you know for sure, you remove it and put a good second hand one on. You can get them rebuilt but it is mui expensive.

[cowie165]

Black32 did you end up sorting this aircon issue?

[Bl4cK32]

Nope. Its still doing the same thing. Im going to pull the compressor off and have it rebuilt. Other stuff has come up, so ive had to live with no a/c

I'll report back when its done and on the car

[cowie165]

Other stuff has come up, so ive had to live with no a/c

<{POST_SNAPBACK}>

Me too. All summer and it's a 40min drive to and from work. Yuk.

I'm keen to hear how you go, cheers!

[predator]

sooks I haven't aircon in any of my cars for the last 3 years..

The compressor unit isn't too hard to remove.. 4 bolts, and two connections to the hoses..

[cowie165]

:lol: Gordo you must be one sweaty individual

Thanks for the info, I'm still deciding if I can be bothered to attempt fault finding or just pay the auto elec to do it. Might be the solenoid, might be the clutch, and simpler yet it could just be a gas leak. Meh. And to think the car is lugging all that weight around needlessly! I don't use ABS and the aircon is stuffed - my traffic light drag times are suffering

[lwells]

For those interested -- and for the sake of propagating the guide in a few related threads so its easy to find with the search facility -- here is a guide for removing the windings in-situ on an R32 GT-R (I imagine its much the same across the R32 series and probably for 33s and 34s).

http://www.skylinesaustralia.com/forums/in...howtopic=112597

[Bl4cK32]

thanks fer that, but unfortunatly my bearings are gooone as well. So it means a all out job for me.

I'll be getting the clutch done too anyway, as i dont fancy doing it down the track