Water Temp. Gauge Problems - DodgeForum.com

Go Back  DodgeForum.com > Dodge Trucks > Dodge Ram > 2nd Gen Ram Tech
Reload this Page > Water Temp. Gauge Problems
Notices
2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Water Temp. Gauge Problems

Reply

 
 
  #1  
Old 07-14-2010, 01:02 PM
frosty32_8
frosty32_8 is offline
Registered User
Thread Starter
Join Date: Jul 2010
Location: Colorado
Posts: 12
Default Water Temp. Gauge Problems

In my 2002 Dodge 2500 Cummins Diesel my water temperature gauge fluctuates to both ends of the gauge (from 140-240). When it first happened I stopped and popped the hood and could tell the truck wasn't at 240 like the gauge said. I limped home and let it sit all night. Went outside in the morning and turned the key on and the gauge immediately rose to read the temperature at 240. This showed me it was truly not overheating. In order to try to fix it, I have replaced the water temp. sending unit and the thermostat. When neither of these helped I installed a mechanical temp. gauge which reinforced that the truck was in fact not overheating (or dropping to 140) as the stock gauge would occasionally say.

Any ideas on what is wrong and how to fix it?
 
Reply With Quote
  #2  
Old 07-14-2010, 01:14 PM
HeyYou's Avatar
HeyYou
HeyYou is offline
Super Moderator
Join Date: Apr 2010
Location: Clayton MI
Posts: 43,410
Default

Bad ground at the gauge? Wiring problem?
 
Reply With Quote
  #3  
Old 07-14-2010, 01:41 PM
J415's Avatar
J415
J415 is offline
Champion
Join Date: Feb 2009
Location: Bay Area, CA
Posts: 3,416
Default

Did you recently do any type of work to it that required you to drain the coolant? If so, it could be an air pocket in there that's causing the problem.
 
Reply With Quote
  #4  
Old 07-14-2010, 04:02 PM
frosty32_8
frosty32_8 is offline
Registered User
Thread Starter
Join Date: Jul 2010
Location: Colorado
Posts: 12
Default

Where is the ground at the gauge located?

Recently I replaced the water pump dropping most of the coolant. How can I get the possible air pockets out?
 
Reply With Quote
  #5  
Old 07-14-2010, 04:03 PM
HeyYou's Avatar
HeyYou
HeyYou is offline
Super Moderator
Join Date: Apr 2010
Location: Clayton MI
Posts: 43,410
Default

Download the factory service manual from the FAQ section here. It is for an 01.... but, I think the 3/4 and 1 ton trucks didn't change until 03?? (Don't quote me on that, I am unsure.)
 
Reply With Quote
  #6  
Old 07-14-2010, 04:40 PM
J415's Avatar
J415
J415 is offline
Champion
Join Date: Feb 2009
Location: Bay Area, CA
Posts: 3,416
  #7  
Old 07-14-2010, 04:53 PM
shott8283
shott8283 is offline
Join Date: May 2004
Location: Bett-neee
Posts: 3,811
Default

ive put 3 coolant temp sensors into my 360 over the years, for some reason they like to go bad. for my motor they were like 12 bucks, cheapest place to start i would think.
 
Reply With Quote
  #8  
Old 07-14-2010, 05:27 PM
J415's Avatar
J415
J415 is offline
Champion
Join Date: Feb 2009
Location: Bay Area, CA
Posts: 3,416
Default

Originally Posted by shott8283 View Post
...cheapest place to start i would think.
Cheapest place to start is to make sure the cooling system was properly bled after the water pump installation. It only cost you time.
 
Reply With Quote
  #9  
Old 07-18-2010, 09:50 PM
frosty32_8
frosty32_8 is offline
Registered User
Thread Starter
Join Date: Jul 2010
Location: Colorado
Posts: 12
Default

How high should a guy raise the front end of the truck to bleed the cooling system? Thanks for the links above but they weren't real specific on how high the front end needs to be lifted.
 
Reply With Quote
 
 
 

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
SteveTangential
1st Gen Ram Tech
4
09-10-2015 10:38 AM
JeeperDon
1st Gen Durango
15
08-20-2015 07:32 PM
0_7_hemi
3rd Gen Ram Tech
7
07-09-2015 01:38 PM
rickluc
3rd Gen Dakota
1
07-08-2015 09:26 AM
tracyballard
Dodge Caravan
0
07-04-2015 02:00 PM

Thread Tools
Search this Thread
Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Featured Sponsors

All times are GMT -4. The time now is 04:44 PM.