Quote:
Originally Posted by knapster
The fan clutch for M103 doesn't engage until 95 C and even then it's not doing much when car is standing still in traffic.
Although I've never tried it, the fan clutch for 400E/E420 engages at a lower temp (around 82 C). If it fits the M103 motor it may be worth a try.
The easiest fix is to solder a 1K ohm resistor onto the coolant temp sensor. This way the signal to the auxilliary fan(s) is sent at around 90 C and not at 105 C.
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AFIK the m103 m104 om603 and om606 (all the 6 cyls) have the thinnest viscous fans of any W124s. Even the 5 cyl om602 runs a beefier viscous fan than the 6. I don't think a V8 fan will fit any 6.