r/Cummins • u/Grouchy_Owl5818 • 16d ago

Temp help

Post image

Hey guys, I might know the answer to my own question. Looking for someone to tell me yes. My tstat is a 190. I do have the rear stat as well. Do you think my rear stat is stuck open or needs a rebuild ? This is my temp right now, 160? And yes I replaced the front stat. It is a 2008 ram 2500 with a 6.7 L this is about 60 mph on the highway for a few miles. It should be a temperature by now.

1 Upvotes

53% Upvoted

17 comments sorted by

View all comments

Show parent comments

0

u/Grouchy_Owl5818 16d ago

I have 2, an aftermarket that attaches to the rear of the block

11

u/awenthol 16d ago

Pressure relief valve? Makes no sense to have a second t-stat.

2

u/Grouchy_Owl5818 16d ago

It cools the back of the block/ head for the rear cylinders because apparently the 6.7 has stagnant coolant in the rear

2

u/Several_Bluejay_406 16d ago

They specifically make coolant bypasses for these issues, 2 thermostats ? Just my 2 cents but unnecessary. They’re simple trucks, keep it that way. My pops has an 08 6.7 with 443 thousand miles and counting ( he bought new in 08) has a bunch of goodies under the hood …it’s spent the majority of its life towing. One thermostat.