Originally Posted by jkypuros
What should I consider modifing on the truck to address coolant overheating? I have added a mini maxx and deleted the DPF & CAT. Will adding an S&B intake significantly lower temps particularly coolant temp?
Last week I towed my 12k lb fifth wheel through some small hills driving from Del Rio to Rocksprings, Texas. This was my first time towing after DPF/CAT delete. When going uphill at around 70 mph in 5th gear EGTs reached 1200 and coolant temp increased to 220 and tuner alarmed and defueled. When going uphill at around 60 the trans stayed in 4th gear, EGTs stayed around 1000 and coolant temp stayed in the 210 - 215 range. The trans temp stayed around 190 - 200. What improvements can be made to the truck to reduce coolant temperature when towing while maintaining speed at 70 mph?
What tune are you running? with 12K suggest No Power
Out side Air temp???? 100*?
Small hills? highway grade 3-5%? how long miles or mile or two?
Air Filter clean???
Trans filter clean oil changed?
EGR installed or deleted?
Good radiator cap ( No puking)?
8K behind mine running the hills in the badlands (10 mile climbs) EGT hit 1200 in OD at 65, dropped a gear and all was controlled at 1150 at 60mph. Coolant never got much above mid range. Imonitor EGTs not coolant driving. I use the OEM coolant gauge.