Do I have a clogged radiator?

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Dec 31, 2019 | 09:37 AM

#16

stonesg

Mountain Pass

Joined: Dec 2018

Posts: 152

Likes: 7

Excellent.

Nice to actually know what's going on by testing, right?

Dec 31, 2019 | 01:56 PM

#17

My4Fordtrucks

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Joined: Jun 2015

Posts: 12,867

Likes: 2,440

Quote:

Originally Posted by OBD_F350

The moral of this story.....I've got a clogged radiator.

Spot scanned the temperature of the radiator after running the truck to normal operating temp. The upper half of the radiator was upwards of 190 degrees; the bottom half was 125 tops.

According to the quote below I'm not convinced. Your coolant temp dropped 65 degrees flowing through the radiator. Seems like its working to me but I don't know how much it should decrease by the time it heads back to the engine. I'll check my truck next time, if I remember.

Quote:

Originally Posted by tjc transport

hot coolant comes out of the engine through the top hose. and is drawn into the engine through the bottom hose.
so the top should be hot, and the bottom should be cooler.

Dec 31, 2019 | 02:56 PM

#18

PRIMERED79 SHORT BED

Laughing Gas

Joined: Jan 2012

Posts: 1,106

Likes: 25

Did your coolant temp gauge fluctuate constantly while driving at all?

Jan 1, 2020 | 03:29 PM

#19

MFJ

Senior User

Joined: Sep 2008

Posts: 287

Likes: 1

From: SE WI

To check my clogged radiator, I took my garden hose and stuck it in the filler neck, no other hoses attached. The flow through the rad couldn't keep up with the hose, so it was time to get a new one.

These trucks are over 20 years old. Probably just time to replace it anyways. Enough casting sand and stop leak will plug anything up.