Water Temp

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Jan 28, 2012 | 05:33 PM

#16

IDIDieselJohn

Post Fiend

Joined: Feb 2009

Posts: 8,005

Likes: 7

From: Ottawa, Ontario

We also can't forget, 6.9's will naturally run cooler than 7.3's as 7.3's have a pretty big coolant passage blocked off in the heads, while in 6.9's, it's open.

Jan 28, 2012 | 05:42 PM

#17

kenpobuck

Cargo Master

Joined: Mar 2006

Posts: 2,789

Likes: 5

From: Sand GAp, KY

That is very true John. Never figured that idea out lol!

Feb 22, 2012 | 04:24 PM

#18

srqlandy

New User

Joined: Jan 2012

Posts: 9

Likes: 0

From: Bradenton, Florida

I have a 6.9 IDI that I just inherited and i went through the entire cooling system about a week ago before I put it on the road. I installed a new Ford T-stat, hoses, belts, and fresh Prestone 50/50 blend. It is warming up hear in Florida a bit and today I ran the truck for about 40 miles on the Interstate at speed with other traffic (70mph i think, no speedo either) in 82 degree weather and my factory gauge never gets up to the "N" in Normal. I don't know if the temp sender unit or the factory gauge is bad. Any help would be great. Thanks

Last edited by srqlandy; Feb 22, 2012 at 05:38 PM. Reason: new information

Feb 22, 2012 | 09:03 PM

#19

IDIDieselJohn

Post Fiend

Joined: Feb 2009

Posts: 8,005

Likes: 7

From: Ottawa, Ontario

Get a real gauge, the stock dash gauges in these trucks, are useless. They're basically an idiot light with an arm.

Feb 22, 2012 | 09:54 PM

#20

dyoungen

Posting Guru

Joined: Aug 2006

Posts: 1,049

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From: Perry Georgia

Down here in Georgia my '87 6.9 runs 180 to 190 right now in the cool winter of 50 to 70 degrees. Last summer in the 90+ days it would run about 190 to 200. And I thought mine was running hot last summer.