Model: XJR (X300)
Engine Size: 4.0
Refrigerant Type: R134a
Country of Origin: United Kingdom
Hi , my Denso 10PA17 compressor has a leak and so have removed it to put on my bench. The car has been standing in a garage for about 2 years but noticed the leak before it was parked up. The system still had a 250 g approx. of r134a in it and so recovered that before removing the compressor. The system had dye in it and the compressor had green dye all over the case and manifold so could not see where it had come from. The compressor had very little oil in it and all run down the lower casing and onto the ground. This must only leak when the system is running as it still has gas in the system. I have cleaned the dye off the compressor , replaced the top manifold gasket and the top manifold. I can only think for the whole compressor to have dye over it must have a leak around the top / manifold section. I have replaced the manifold but now think it must have leaked from around the top manifold / compressor large gasket that I have now replaced. The compressor was very low on oil but has not been run like that and looks like new inside the top plate and turns very smooth. Can any members confirm that the Denso 10PA17 top plate gaskets leak like this ?
I plan to refill with pag46 and refit and add dye and test for leaks in about two weeks time. I can only think a small leak under high pressure would spray a vapour of oil /dye etc and would account for the dye all over the compressor and not leak while standing ?
Thanks for your hep in advance .
I'm thinking that it leaked out of the front shaft seal.
Then air flow blew the oil all over it.
I am sure air must have blown it around but the section behind the front seal / clutch was quite clean so had not come from the shaft seal
I would sure consider replacing the shaft seal , while I had it out and on the bench .
I refitted the compressor and recharged and added dye. I run the system for about 40min and air very cold and has a small sign green dye from around the clutch plate. This can now only be as the last poster said which is the front seal. I have taken another denso compressor apart to see what is required in order to replace the seals and looks a very easy job. The compressor is also easy to remove and fit so will order the O rings , crush washers and front seal to complete the service. I expect I will order the parts from the supplier of this site as so far I have not found a supplier in the UK for the seals for the 10PA17 compressor but as we know many cars use this type. Thanks for all your help with this.
Replaced all 3 large O rings , front seal and crush washers , recharged and given long test and now ok. the three large O rings in the compressor body had expanded a lot when put up against the new seals .
Does this just happen with age as they are a type of rubber and are almost 19 years old now ?
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