Fan issue
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Senior User
Joined: Jul 2016
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Heli-coil is an easy fix for your housing if you have the tools and know how. If your deltas go up with ECT you need to fix that first. Before I pulled the oil cooler I would back flush it and run 3 qts of restore through it. If your deltas stay below 15* leave it alone and just change the thermostat.
Fleet Mechanic
Joined: Nov 2012
Posts: 1,348
Likes: 110
From: Lakeland, Fl
Back flush and restore. I clogged mine just changing coolant brands, went from Cat ELC to Zerex ELC and gelled it. Easy fix with Restore. Your coolant to water mix will raise deltas too.
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maybe I'll give it a shot then. I did put new coolant in it because I had oil contamination. I flushed with cascade for an hour then 20 gallons of distilled water was Crystal clear when it came out. New elc at a perfect 50/50 mix. Could still be clogged which I hope isn't true but I just find it unlikely.
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yea I don't think I'm gonna. Looking at 15* yea it's not ideal but no egr cooler I think it will live for a bit longer. Plus I just did a bunch of work on it and the wife will kill me if I tear her open again.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
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From: Spanaway
When you do get around to doing be sure to take the radiator out
and turn upside down and flush out anything that has been hiding
in the top tank. A lot of crap can collect there.
and turn upside down and flush out anything that has been hiding
in the top tank. A lot of crap can collect there.
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Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
The t-stat housing bolt holes in the front cover aren't blind. Pull the bolt, clean up the treads and see if it was really cross threaded. If it was, step it up a size and tap it. Are you sure it was cross threaded, or does it just need to be chased?
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I'm pretty sure as I've taken it out several times and cleaned it but maybe I should blow out the hole.
New User
Joined: May 2016
Posts: 19
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From: Roy, Utah
I was having low fan speeds (300-400 rpm) in town, so I changed out the fan clutch for a snow plow one. Now I see from ( 500-700 rpm) and up to 1100 on the highway, cools much better and I can't hear the difference.
