ajm55

I have a modified 2005 E55. My original OEM aircon compressor bombed 4 years ago. The service provider engaged to do the repair replaced the dryer, condenser and compressor with new units. The replacement compressor was not OE but rather a Denzo unit. This unit has now failed (some 4 years later) and requires replacement. When I queried the quality of the Denzo unit and the likely cause of the failure, I was told that 4 years is the expected lifespan of an aircon compressor on an E55. I find this difficult to accept especially considering that the vehicle had only traversed 20,000 kms in the 4 year period. I am running a KC kit - not sure if, and to what extent, that would diminish the life expectancy of the compressor.

Any thoughts/experiences with regard to the advice I've been given.

takeiteasy

rubish never heard a compressor have a lifespan of 4.. it should push 10 years or more

tw2

I don't know how the killer chiller works but my guess is almost everyone here is running their original compressor with no issues. Denzo or Denso? Is a Japanese oem. My original denso compressor in my 1991 mr2 still works perfectly. After replacing the leaking evaporator I get 4 degree Celsius air from the vents.

ajm55

Thanks for the feedback. Yeah, sounds like nonsense to me. I’ll take it up with the local Denzo agent, for what that’s worth

Monster-GP

how many owners have had a/c issues on the various merc models

Monster-GP

have u replaced any compressors on your various vehicles

BoDog

I'm not sure about this compressor you bought but somewhere around 80k my original went out and I was able to fix it with a cheap kit like the guy in this video uses. Basically a seal goes out in the compressor you can replace for about $20 bucks and some time taking out and putting the new seal and some granules. So if you have the original you can probably fix it for next to nothing.

I followed instructions put it back in, started car and it raised and lowered like new. My mechanic wanted to replace all the shocks and air compressor for something like $1200. Some of these fixes are worth a search on youtube.

mAMG

I think they tend to fail around the 100k km. I had two E55s 03 and current 05 both failed near 100k kms.


Question is, is the DENSO replacement is as good as the OEM regarding the cooling capabilities ?

When I had installed the Denso on the 2003 E55, it was not as cool as the failed factory one.

hachiroku

Denso makes a replacement pump? thats news to me.

tw2

I can't see why it wouldn't be as good. All it does is compress the refrigerant. The installer should have verified that the high and low side pressures are correct. It also depends on how the system was prepared. It seems a lot of shops don't always do the job correctly as it is quite time consuming and expensive. The system should be completely leak tested, flushed, all relevant seals replaced, under vacuum for at least 30 minutes, drier always replaced and new compressor oil added. If all that was done is the compressor swapped and the system refilled then I would expect the performance to be worse.

ajm55

Thanks for all the feedback gents. tw2, do you know offhand what the high side and low side pressures should be? Is this dependant on ambient and is there a formula commonly used to calculate the required pressure at each end? I understand that the Killer Chiller may have an impact, at a minimum, on the desired high side pressure. If I recall correctly, Joe Kincaid recommends multiplying ambient by 2.9. Feedback from anyone running a KC would be helpful