So my rad cap was one piece of the puzzle in my coolant woes on my new to me truck.

Still getting coolant smell so next test is to pressure test it. I have clean oil and no issues running with the cap off. so its not a head gasket. I smell strongly around the passenger side near the end of the radiator.

I will get under the truck tomorrow evening. to see if I can see the leak.

if its the rad and or waterpump gasket I will be replacing the stock clutch fan with the 2005+ efans with a nelson racing harness and repin the ECU.

other than the waterpump gaskets are there any other problematic issues?

 

Water pump, lower rad hose or heater core hoses are always my first checks.

 

What year truck do ya have? And are you running thre green antifreeze? Reason I ask this is because on our Gen3 trucks the aluminum heads are pourus and therefore DexCool- the red stuff, is necesarry..........