Source for AC Pump Seals?

[JC220]

Hi All,

Can anyone provide a link please for where to buy new Air Con pump seals? (That is the main shaft seal for example behind the clutch pulley) I presume this is not MB and has to come from another specialist.

Reason I ask is I believe I have a couple of M119 AC compressors losing freon at the front shaft seal area. Would like to know if they are junk or may be repairable.

Has anyone carried out such a repair?

 

[gsxr]

Can anyone provide a link please for where to buy new Air Con pump seals? (That is the main shaft seal for example behind the clutch pulley) I presume this is not MB and has to come from another specialist.

Reason I ask is I believe I have a couple of M119 AC compressors losing freon at the front shaft seal area. Would like to know if they are junk or may be repairable.

Has anyone carried out such a repair?

I've never done this, but I was just asking @LWB250 the same question! I have a couple of A/C compressors which are leaking oil from the front shaft seal area, but at least one doesn't appear to be leaking refrigerant... or it's such a small leak it isn't detectable yet. Charged in summer 2019 and has been ice cold through summer 2020 and 2021. Yet it's still losing a small amount of oil from the clutch air gap.

Anyway - there are seal kits on eBay, but I don't know what brand or vendor to recommend. It appears most may be selling the same radial shaft seal kit made by Sunair, plus the shaft protector/installation tool. Some vendors add other seals/O-rings in addition to the shaft seal kit:

denso compressor seal 10PA17 for sale | eBay

Get the best deals for denso compressor seal 10PA17 at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!

www.ebay.com

Might want to use Nylog Blue on some of the fittings as well, although I'm not sure if it should be used on O-rings or not, there seems to be conflicting info. Maybe @M104-AMG can chime in:

Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack): Nylog Blue: Amazon.com: Industrial & Scientific

Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack): Nylog Blue: Amazon.com: Industrial & Scientific

www.amazon.com

 

[JC220]

I've never done this, but I was just asking @LWB250 the same question! I have a couple of A/C compressors which are leaking oil from the front shaft seal area, but at least one doesn't appear to be leaking refrigerant... or it's such a small leak it isn't detectable yet. Charged in summer 2019 and has been ice cold through summer 2020 and 2021. Yet it's still losing a small amount of oil from the clutch air gap.

Anyway - there are seal kits on eBay, but I don't know what brand or vendor to recommend. It appears most may be selling the same radial shaft seal kit made by Sunair, plus the shaft protector/installation tool. Some vendors add other seals/O-rings in addition to the shaft seal kit:

denso compressor seal 10PA17 for sale | eBay

Get the best deals for denso compressor seal 10PA17 at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!

www.ebay.com

Might want to use Nylog Blue on some of the fittings as well, although I'm not sure if it should be used on O-rings or not, there seems to be conflicting info. Maybe @M104-AMG can chime in:

Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack): Nylog Blue: Amazon.com: Industrial & Scientific

Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack): Nylog Blue: Amazon.com: Industrial & Scientific

www.amazon.com

Thanks for that Dave, yes that's what I am looking for however I can not buy that listing on ebay UK

I guess the first thing to do will be take into on of my spare m119 pumps and see if I can remove the seal first.

Is the re-seal idea patented? I could maybe do a How- To

 

[JC220]

This is a pretty good video on the general subject:

It will be next weekend until I get to it but I'm going to have to check an m119 pump first to see if the compressor shaft seal can be renewed externally or are additonal seals required to complete the task.

The installer tool is something that may have to be figured out also!

Note that over here we do not have any AC pump rebuilders locally. And m119 compressors are around £500gbp from aftermarket suppliers for a new Denso item. Air conditioning parts are in general alot more expensive this side of the pond.

Actually if I understand the reference numbers these videos may be the same as our pumps(?)

 

[JC220]

Broke out my USB endoscope camera on my 1995 S500 coupe. (Who's system hasnt held a vacuum for me even though it has new condensor & drier etc) I determined on the green label it has Denso series: 10PA20C.

Ordered the following master reseal kit which includes the special tool and all seals:

Denso 10PA20 Series Master Reseal Kit KT-10PA20-SYS

Auto AC compressor reseal parts and kits, automotive AC service parts, compressor reseal kits,10PA,10P, HS18S20, FS10, R4, A6,HT6,Sanden, shaft seal tools...

www.shopcenturyautoair.com

Also ordered the mineral oil shringes they have for assembly per the videos above.

Great company too they answered a query I had and their online shop has international shipping options Should have the kit in 2 or 3 weeks then will rebuild the compressor in my S500 and see if she holds vacuum for more than 10 minutes!

 

[JC220]

Great thread with photos here also:

Nippondenso 10PA20C Compressor Rebuild pics - Rennlist - Porsche Discussion Forums

928 Forum - Nippondenso 10PA20C Compressor Rebuild pics - After re-doing all the o-rings in my A/C last summer, replacing the expansion valves, drier, and the relay in the head unit, the only things not up to snuff in my A/C were the two hoses that run to and from the compressor, the PITA...

rennlist.com

 

[JC220]

Might want to use Nylog Blue on some of the fittings as well, although I'm not sure if it should be used on O-rings or not, there seems to be conflicting info. Maybe @M104-AMG can chime in:

Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack): Nylog Blue: Amazon.com: Industrial & Scientific

Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack): Nylog Blue: Amazon.com: Industrial & Scientific

www.amazon.com

Couldn't source that sealant Dave but located a USA branded one here which appears suitable for refrigerant so hopefully same thing:



Intend to apply this sparingly alongside new O rings unless advised otherwise by members.

Will also order up new O rings from the dealer, whilst I have a generic Air Con O ring selection pack I'll only utilise it when at short notice without dealer parts.

 

[JC220]

Just picked up my seal kit at the local post office, slipped through without import duties



I will get ny S430back together and out first then get to this in a couple months