PeachParts Mercedes-Benz Forum - View Single Post - W116 300SD Air Conditioning Upgrade (Parallel Flow Condenser, Sanden, Larger Fan)

w123fanman · #6 08-08-2015, 12:28 AM

I am currently working on a similar project for my brother's 1980 300SD but a bit more ambitious:

-7 cylinder Sanden compressor kit from Rollguy

-Dual parallel flow condensers (why not? Such a small condenser as it is)

-Volvo/Taurus electric fan to replace clutch fan. This is already installed, cools very well, and is a lot less expensive than a new clutch ($35 vs $250). The Volvo shroud required a small amount of cutting but fits the radiator and oil cooler very well. For this we still have to install a temp switch but currently for the summer we have it running constantly.

-Dual aux fan setup from 190E 2.6 (takes out the brackets for the old fan but fits in there very nicely, it's just two of the original fan, they pull gobs of air)

-150 amp alternator to handle the extra load of fans and eventual sound system upgrade (already installed)

-Unwired Tools ACC controller (pulled from his parts car, already installed)

-GM orifice tube system to replace the unreliable expansion valve, also act as filter, much easier to service than the expansion valve. Pressure/temp switches can be replaced without having to evacuate the system and cost far less

Also installing AN steel braided oil cooler lines, new engine mounts, engine shocks, oil filter housing seals, oil pan seal, Zerex G-05 coolant. Most of these are things that needed to be done and are easiest to do while the AC compressor is out.

The blower motor is currently working somewhat on and off so we have to diagnose that

These jobs should lead to a cool running engine and cold AC.