Bulge in my...rad hose coolant temp is low..

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Apr 21, 2022 | 10:30 PM

#11

krustacean

Thread Starter

Overlanding

Joined: Mar 2022

Posts: 19

Likes: 1

From: Toronto, Canada

Quote:

Originally Posted by ahab

At least in the later trucks, the ECU gets its temp info from the CTS in the intake manifold. I'm not sure what the one in the radiator does, some trucks don't have that. My '04 doesn't and my '03 is a complete '04 swap so neither does it. Not sure about the '02. It takes a while for the lower hose to get hot to the touch. If you just let it idle a few minutes and it didn't get hot then that's not a good test. If you drive it a round for a bit it should get hot. Could be a bad cluster/gauge too.

makes sense since my interior heating is nice and toasty. I didn’t get a chance to drive it around, i was idling for about 20 minutes and it hit the first mark on the cluster gauge and didn’t go up from there. Thanks for the useful tips!!

May 1, 2022 | 04:05 PM

#12

krustacean

Thread Starter

Overlanding

Joined: Mar 2022

Posts: 19

Likes: 1

From: Toronto, Canada

UPDATE!! replaced the coolant temp sensor up top and bingo. Getting the gauge to the middle feels great! Problem resolved.

May 2, 2022 | 01:02 PM

#13

tnrangerover

Rock Crawling

Joined: Oct 2020

Posts: 319

Likes: 151

From: Nashville, TN

Quote:

Originally Posted by krustacean

UPDATE!! replaced the coolant temp sensor up top and bingo. Getting the gauge to the middle feels great! Problem resolved.

you still need to replace all the plastic and hoses in your cooling system. also, would recommend getting a way to read actual temps. The needle will show middle of the gauge from about 150-230 degrees before it moves up, and 230-240 is already too hot IMO.