Om603 Solving temp swings - PeachParts Mercedes-Benz Forum

97 SL320 · #1 07-24-2019, 05:16 PM

Quote:

Originally Posted by dieseldiehard

My OM604 cooling has temp fluctuations that are hardly anything compared to the OM603 but oddly my M104 seems to have a lot of temp variations, the engines use almost the same block and I assume the cooling systems are similar but I haven't really examined them closely.

Have you pulled / inspected the M104 stat?

See my post 12 and 14 95 C280 Overheating

The M104 uses a stat that regulates water going to the rad rather than coming from the rad like the OM.

dieseldiehard · #2 07-26-2019, 07:10 PM

Quote:

Originally Posted by 97 SL320

Have you pulled / inspected the M104 stat?

See my post 12 and 14 95 C280 Overheating

The M104 uses a stat that regulates water going to the rad rather than coming from the rad like the OM.

well, yes I changed the thermostat already. I updated the T-housing too at that time.
I wasn't aware of the different cooling systems. Shows you what little I know.

I have some Motul coolant additive supposed to lower temps but haven't put it in yet, I'm sorta waiting to flush the system and replace antifreeze. I am skeptical of claims made by most additives but this might help a little. I used a similar Redine product in another car and didn't notice any difference.