PeachParts Mercedes-Benz Forum - View Single Post - How to keep a 14 head OM603 going as long as possible?

Diseasel300 · #2 12-22-2018, 01:06 PM

The cooling system is the most important part to keep up to snuff. Nothing else really matters, if the head is going to crack, it's going to crack. Whether or not those cracks lead to compression leaks or oil/coolant consumption is luck of the draw. I personally think the paranoia behind the 14 head is overblown.

The hunting temps are probably due to thermostat problems or fan clutch as you mentioned. Mine hunted would drift up to 100-105 in hot weather with A/C or slow traffic until I changed the fan clutch. Swap over to the 606 turbo clutch and 11 blade fan, it helps the A/C and helps airflow over the radiator.