Improve BMW z3 a/c - service / clean evaporator

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BonBon
Joined: Tue 08 Jan, 2008 21:10
Posts: 1201

  Z3 roadster 1.9

Improve BMW z3 a/c - service / clean evaporator

Post by BonBon » Sun 30 Jun, 2019 11:29

My A/C did not come close to my wife's 8 year old CIVIC. I tried everything from new compressor, drier and cleaning the condenser with mild caustic and water rinse.
The biggest difference was cleaning out the evaporator. Getting in there is the same procedure as to access the resistor pack. It takes about 30 mins with minimal skill level. Just a bit of a pain to access. I vacc'ed, sprayed with 50% water vinegar/mix and washed out with a nice dose of water with a garden hose. (using a jet can bend the aluminum fins)
This made the biggest difference to the a/c. Airflow up about 50% and also somewhat cooler. You can see that the evaporator was partially blocked after over 20 years in service.
Before and after:
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Gazza
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Joined: Tue 04 Oct, 2005 21:58
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  M roadster S54
Location: Romford Essex

Re: Improve BMW z3 a/c - service / clean evaporator

Post by Gazza » Sun 30 Jun, 2019 17:30

Thanks, I’ll add it to the Knowledge base :wink:
Gazza

"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"

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