Lower radiator hose does not get warm - PowerStrokeNation : Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 27 (permalink) Old 09-10-2018, 02:43 PM Thread Starter
PSN Newb
 
hoboo128's Avatar
 
Join Date: Jun 2018
Posts: 13
Lower radiator hose does not get warm

I recently rebuilt my 1995 7.3 and the lower radiator hose will not get above ambient.

I boiled the thermostat, it does open.

The top hose into the radiator is hot.

The heat blows hot.

The block was acid washed and the oil cooler is brand new.

The temp. gauge reads normal.

It has a new gates water pump installed. It is the right model for a 1995, as I tried a long neck thermostat and it does not fit.

Is the radiator really that efficient at cooling or could I have some sort of blockage? Is there anything that I could have installed wrong that would block flow?
hoboo128 is offline  
Sponsored Links
Advertisement
 
post #2 of 27 (permalink) Old 09-10-2018, 03:08 PM
PSN Veteran
 
79jasper's Avatar
 
Join Date: Mar 2012
Location: Skiatook Oklahoma
Posts: 3,675
Re: Lower radiator hose does not get warm

As a test, try a aftermarket temp gauge to verify operating temp. If it really is getting up to temp, don't worry about it.
Also, just because the thermostat opens when you boil it doesn't mean much. It could be opening way early.
I ran the 205 thermostat, my truck seemed to like it.
And hows the fan? It's not roaring all the time is it?
Sent from my SAMSUNG-SM-G930A using Tapatalk

1979 chevy c30 dually, sm465, 373's? Converted to 6.2 diesel, pump turned up and advanced a hair.(wrecked)
1994 ford F350 dually 4X4: 7.3 powerstroke, 5 speed. 6637, straight pipe into dual stacks. Cooper discoverer at/3's.
2010 Jetta TDI 40 or so mpg :flippa:
79jasper is offline  
post #3 of 27 (permalink) Old 09-10-2018, 03:33 PM
2000 F350 SuperDuty 4x4
 
Calico5's Avatar
 
Join Date: Oct 2007
Location: SoCal
Posts: 1,009
Re: Lower radiator hose does not get warm

When you say the upper hose gets hot, how hot is "hot"?
When the truck's up to temp, you shouldn't be able to keep your hand on the upper hose for more than a second or two...that's HOT.
If, in that condition, the lower hose is cool, then your radiator is doing it's job.
If you loosen/remove the lower hose (at the radiator), does the coolant drain? If so, then it should all be good...

Al in SoCal
AFE Intake; Garrett 38R; Turbine Jacket; Banks IC, BanksBrake
Melling LPOP, External Oil Cooler & Filter System
Stealth 4-line Twin HPOP,
Swamps 160/30's, HVHF IDM; DP-Tuner F5
Full R-R Fuel System, Pre-& Post-pump filtration
Mishimoto Rad & Tank; 4" Exhaust, Twin Aussie Stacks
SouthBend D-D Clutch; ZF 6-spd, GearVendors O/U Drive
Calico5 is offline  
 
post #4 of 27 (permalink) Old 09-10-2018, 04:00 PM Thread Starter
PSN Newb
 
hoboo128's Avatar
 
Join Date: Jun 2018
Posts: 13
Re: Lower radiator hose does not get warm

Quote:
Originally Posted by 79jasper View Post
As a test, try a aftermarket temp gauge to verify operating temp. If it really is getting up to temp, don't worry about it.
Also, just because the thermostat opens when you boil it doesn't mean much. It could be opening way early.
I ran the 205 thermostat, my truck seemed to like it.
And hows the fan? It's not roaring all the time is it?
Sent from my SAMSUNG-SM-G930A using Tapatalk
I haven't noticed the fan running excessively.
hoboo128 is offline  
post #5 of 27 (permalink) Old 09-10-2018, 04:03 PM Thread Starter
PSN Newb
 
hoboo128's Avatar
 
Join Date: Jun 2018
Posts: 13
Re: Lower radiator hose does not get warm

Quote:
Originally Posted by Calico5 View Post
When you say the upper hose gets hot, how hot is "hot"?
When the truck's up to temp, you shouldn't be able to keep your hand on the upper hose for more than a second or two...that's HOT.
If, in that condition, the lower hose is cool, then your radiator is doing it's job.
If you loosen/remove the lower hose (at the radiator), does the coolant drain? If so, then it should all be good...
If I took the bottom hose off it would definitely drain. It fills from the lower radiator hose.

The degas bottle also never gets warm. It does build pressure though when the truck is heated up.
hoboo128 is offline  
post #6 of 27 (permalink) Old 09-10-2018, 04:12 PM
2000 F350 SuperDuty 4x4
 
Calico5's Avatar
 
Join Date: Oct 2007
Location: SoCal
Posts: 1,009
Re: Lower radiator hose does not get warm

Again:

Quote:
Originally Posted by Calico5 View Post
When you say the upper hose gets hot, how hot is "hot"?
When the truck's up to temp, you shouldn't be able to keep your hand on the upper hose for more than a second or two...that's HOT.

Al in SoCal
AFE Intake; Garrett 38R; Turbine Jacket; Banks IC, BanksBrake
Melling LPOP, External Oil Cooler & Filter System
Stealth 4-line Twin HPOP,
Swamps 160/30's, HVHF IDM; DP-Tuner F5
Full R-R Fuel System, Pre-& Post-pump filtration
Mishimoto Rad & Tank; 4" Exhaust, Twin Aussie Stacks
SouthBend D-D Clutch; ZF 6-spd, GearVendors O/U Drive
Calico5 is offline  
post #7 of 27 (permalink) Old 09-10-2018, 04:15 PM Thread Starter
PSN Newb
 
hoboo128's Avatar
 
Join Date: Jun 2018
Posts: 13
Re: Lower radiator hose does not get warm

Quote:
Originally Posted by Calico5 View Post
Again:
Definitely not comfortable to keep my hand on it.
hoboo128 is offline  
post #8 of 27 (permalink) Old 09-10-2018, 04:25 PM
Master BS'er
 
jamiesaun's Avatar
 
Join Date: Nov 2016
Location: Boise Idaho
Posts: 5,780
Re: Lower radiator hose does not get warm

Something is not right. Either blockage, or air or t stat or something. Upper and lower hoses should be close to the same temperature when the engine is at operating temp.

Get a infrared gun and run it around the radiator, measure both sides of the t stat, measure the block and heads, etc.

Brother James

Ps...Im pretty frickin awesome!
jamiesaun is offline  
post #9 of 27 (permalink) Old 09-10-2018, 04:29 PM
Master BS'er
 
jamiesaun's Avatar
 
Join Date: Nov 2016
Location: Boise Idaho
Posts: 5,780
Re: Lower radiator hose does not get warm

If t stat is not opening, one hose will be hot and the other cold. If it's stuck open, neither hose will be hot.

You've proven it opens, so it's not the t stat. It's probably blockage or air or something.

Brother James

Ps...Im pretty frickin awesome!
jamiesaun is offline  
post #10 of 27 (permalink) Old 09-10-2018, 04:45 PM Thread Starter
PSN Newb
 
hoboo128's Avatar
 
Join Date: Jun 2018
Posts: 13
Re: Lower radiator hose does not get warm

Quote:
Originally Posted by jamiesaun View Post
Something is not right. Either blockage, or air or t stat or something. Upper and lower hoses should be close to the same temperature when the engine is at operating temp.

Get a infrared gun and run it around the radiator, measure both sides of the t stat, measure the block and heads, etc.
Any idea what the temperature difference between the in and the out of the radiator should be?


I did already try this with a harbor freight infrared gun. Nothing was showing an alarming temperature on the motor. However, the heat coming out of the vents were coming up over 260F. I'm assuming this is just an error from having the hot air blowing right on the gun.

Could the bottom radiator hose be collapsing while driving? I don't notice anything when it is idling. I'm not really sure how I would be able to tell.

I'm also afraid there could be blockage. I can't think of a way to test this though.
hoboo128 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PowerStrokeNation : Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome