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Author Topic: Broken Delphi aircon compressor? Possible fix.  (Read 8958 times)

Offline skard

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Broken Delphi aircon compressor? Possible fix.
« on: August 10, 2014, 10:21:53 am »
If you have a Delphi aircon compressor with the 'loose centre bolt' where it won't engage, then here is how I managed to fix mine as a DIY for about £40.
If your AC system looks fine - topped up, no leaks, all seems ok via VCDS logs, then this is worth looking into.

I did this on my Tiguan last week, but it uses the same compressor as the mk5 and loads of other similar era VAGs so this might be helpful for someone.

What happened was the splines on the shearplate became rounded off, so it stopped engaging with the compressor shaft. The compressor itself was fine.

From underneath the car, remove four T27 torx screws from the shear plate (no need to slacken the aux. belt, remove tension or anything like that, it is all done in situ in 10 minutes), then pry the old plate off.

Once off you will see if the centre has rounded. If the stub has sheared off then your compressor will have seized.
It is worth doing this just to check before purchasing anyway.

I put the replacement plate on and immediately I had cold air.
I can only imagine how many compressors and other bits have been swapped out over this.

Here is a pic of the old plate


And here is a side by side with the new one


I got the new plate from ebay.de as it is an aftermarket part.
Used to have Edition 30 - number 009 and a GT TDI 140.
Now have an S4 B8 Avant (stage 2)

Offline biffobear

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Re: Broken Delphi aircon compressor? Possible fix.
« Reply #1 on: August 10, 2014, 12:02:52 pm »
There must be a lot of owners out there spent a fortune buying compressors, and it could have been this fault :sick:

Offline skard

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Re: Broken Delphi aircon compressor? Possible fix.
« Reply #2 on: August 10, 2014, 12:21:15 pm »
I would guess so.
I had actually made enquiries to get it booked in with an aircon expert to get the compressor swapped out, then thought I'd try this first.
Used to have Edition 30 - number 009 and a GT TDI 140.
Now have an S4 B8 Avant (stage 2)

Offline Andy

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Re: Broken Delphi aircon compressor? Possible fix.
« Reply #3 on: August 10, 2014, 12:24:33 pm »
Excellent fix Dave :happy2:

Offline skard

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Used to have Edition 30 - number 009 and a GT TDI 140.
Now have an S4 B8 Avant (stage 2)

MPS

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Re: Broken Delphi aircon compressor? Possible fix.
« Reply #5 on: August 10, 2014, 12:42:42 pm »
How can the splines just wear away like they're made of chocolate or something?

Offline skard

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Re: Broken Delphi aircon compressor? Possible fix.
« Reply #6 on: August 10, 2014, 01:00:42 pm »
The original must be a softer metal than the compressor shaft, as that had no rounding of the splines.
Used to have Edition 30 - number 009 and a GT TDI 140.
Now have an S4 B8 Avant (stage 2)

peterm5329

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Re: Broken Delphi aircon compressor? Possible fix.
« Reply #7 on: November 04, 2015, 10:52:43 pm »
I have the same issue on my b6 Passat. Does any one know how the centre screw is removed if the compressor shaft is still able to spin? How do you lock the compressor shaft to enable the screw to be removed. Hopefully this will fix my problems if the screws all come out. Does the new plate simply slide on to the shaft?


DonCowleone

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Re: Broken Delphi aircon compressor? Possible fix.
« Reply #8 on: December 02, 2015, 07:35:23 pm »
Don't know if you fixed it yet Peter but I just had the same issue a couple of weeks ago but the black outer piece had come off the rest of the clutch plate and so was jingling around. I also struggled with the centre screw and resorted in the end to hacksawing the head off, I was then able to get to the centre shaft with grips and remove the rest of the screw, piece of cake after that... VW wanted to charge me £818 to fix, and that was including their 20% off goodwill gesture... Jokers!
Hacksawing took a while though, and not much skin left on my fingers!