DodgeCharger.com Forum
November 20, 2019, 02:09:59 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Please remember: this is the place to discuss Chargers - NOT the place to discuss politics. Political posts will be locked or deleted at the Moderator's discretion.
 
   Home   Help Calendar Login Register Chat  
Pages: [1]   Go Down
  Print  
Author Topic: temp gauge needle moving around  (Read 784 times)
timmycharger
Old Timer
*****
Online Online

Posts: 1,638



« on: May 25, 2018, 06:32:08 AM »

Yesterday I drove my 68 to work, taking it on it's first long highway run since the engine rebuild and car restoration.  I have an aftermarket Be Cool radiator and dual electric fans and a 195 Tstat and had no issues with overheating since getting it back on the road. 

Yesterday morning on the way to work it held the temp steady, around 200 or so (best I can guess with stock style gauge) and had no issues. On the way home, in about 75 degree weather, the temp needle was moving around more than usual. It creeped up to about 220 for a short period then quickly moved back to around 200. I didn't think the needle should move so quickly, sort of a gradual thing?

I then approached some traffic and it stayed in the 200 range until I went home.  Is it normal for the temp to fluctuate so much while on the highway?  One theory I have is that the fans are not going on while I am at highway speeds and when I slow down, they kick on? I don't remember it doing this 20 years ago LOL
Logged

70 sublime
Old Timer
*****
Offline Offline

Posts: 2,591


next project 1969 Charger 383 auto


« Reply #1 on: May 25, 2018, 10:18:37 AM »

Almost sounds like the thermostat stuck shut a little then popped open ?
Logged

current project 69 Charger Daytona clone F6 green
next project 70 Charger FJ5 green
justcruisin
Senior Member
****
Offline Offline

Posts: 610


« Reply #2 on: May 25, 2018, 05:17:59 PM »

I wouldn't rely on the accuracy of the factory gauge, to be sure, it is a good idea to fit up a quality mechanical gauge - even if it is only temporary for testing purposes.

It is possible to get pockets of water that get caught in an area of the engine and heat up then move on, in my experience this is only the case when not using a t-stat though.

A 195 t-stat is too high IMO.
Logged
A383Wing
Old Timer
*****
Offline Offline

Posts: 10,955


Old, Lost & Confuzed


« Reply #3 on: May 25, 2018, 05:22:24 PM »

Possible cluster voltage limiter is sticking causing full battery voltage through the gauges
Logged
Dino
Old Timer
*****
Offline Offline

Posts: 11,275


Forgotten but not gone


« Reply #4 on: May 25, 2018, 06:23:03 PM »

If you haven't stuck a solid state voltage liiter on there yet, please do. I fried two gauges just after restoring them because the stock limiter gave out. Not cool!

180 thermostat should work fine in your car btw, but if this works for you then go for it.
Logged

Extraordinary claims require extraordinary evidence.
timmycharger
Old Timer
*****
Online Online

Posts: 1,638



« Reply #5 on: May 26, 2018, 09:02:42 AM »

Thanks guys. I like the idea of another gauge, I think I have one. Yes I did have the solid state limiter installed when I had my cluster restored. I keep reading conflicting opionions about what temp thermostat to use. I may try the 180 in the future.
Logged

TexasGeneral
Junior Member
**
Offline Offline

Posts: 111



« Reply #6 on: December 01, 2018, 10:04:14 PM »

 2thumbs 2thumbs 2thumbs 2thumbs
Possible cluster voltage limiter is sticking causing full battery voltage through the gauges
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
Page created in 0.045 seconds with 17 queries.