Engine does not make heat

DENNIS FREY

MEMBER
1998 DODGE RAM
5.9L
6 CYL
TURBO
4WD
AUTOMATIC
226,000 MILES

Engine wont make heat 70 degrees on scan tool at 45 below 0 190 thermostat not opening at all two different stock pumps. This is diesel 6 ramp 70hp over stock injectors 5in exhaust trying to find problem last three or four years modified one water pump cut impellers down restricted floe through transmission cooler no engine fan. Only comes up to about 130 degree thermostat still not opening top rad hose 80 degrees on temperature scanner tool. Seventy five years young still driving eighteen wheeler and quad dump raced and built motors in 1970's circle track also diesel mechanic gateway trans semis Chicago.

Friday, March 1st, 2019 AT 7:26 AM

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

I would try a higher temperature thermostat. Also you might try cutting down your percentage of coolant and decreasing the amount of water. Coolant raises the boiling point of the water to well above 212 degrees. Also, you might try blocking the grille of your vehicle. By not letting air through to the engine it allows engine to collect and trap heat. Another idea, though I am not a big fan of, is to restrict your vehicles exhaust, creating back pressure. I understand that engine is nothing more than an air pump and the key to making horsepower is air in/air out, but restricting the exhaust will bring your engines temperature up. You don't want to choke it out, but it's an idea. Anyway I hope these ideas help.

Thanks,
Alex
2CarPros

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Saturday, March 2nd, 2019 AT 2:10 AM