Having overheating problems on my 12v cummins. when it's

Too lean? How are the injectors? Dirty as fuck probably. How old are yerrr spark plugz? faulty Diesel glow plugs can make them run hottttt

Injectors are new. They are much bigger than stock but egts are always below 900. No glow plugs in cummins. In hot weather such as today the engine gets warm fast. Within a 15min drive it got to 200. Fan clutch is good. Why is it climbing temp when I drive and cooling when I come to a stop?

idk, make the thermostat stay open? What tells the water pump to start pumping?

Clogged heater core and needs airflow?

>>17255020
Take a look at your hoses. I replaced a lower hose once that was a bit too long and i didnt bother trimming it. Well it ended up having a bit of a crimp in it so at highway speed/rpms i wasnt getting good flow. Took me a year and a lot of new unnecessary parts to figure it out.

Does your fan have a good shroud on it? Is it fixed mechanical or on a clutch (the fan)? What kind of charge cooling setup does it have, is it intercooled or aftercooled?

Has it had a valve adjustment lately too?

>>17257599
Stock 12v is not intercooled

Mechanical fan or electric? Do you have a fan shroud?

>>17255020
Fucking lmao should of got a Chevy

Heating up when moving and cooling back off when still is usually a sign of the radiator not being sufficient, yet you stated it was new.
Have you flushed the block? Confirmed your thermostat was opening (or closing)?

>>17255020

>>17255072


Maybe you should have used the right injectors.

Partially clogged heater core.