Cooling Indication 454 GMC - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 11-13-2010, 02:16 PM
Registered User
 
Join Date: Nov 2010
Location: phoenix
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Cooling Indication 454 GMC

Where can I find a detailed wire diagram of the for the cooling system on a 1988 ck3500 454tbi. Replaced both temp indicator sensors above ex manifold. replaced temp sensor by thermistat. Replaced whole cooling system, Rad/Pump/Therm/Hoses. The eng temp is normal by feel. hot H20 on top hose, cool H20 on bottom hose. Indications run at 240 Plus, after shut down, gage will peg out. I suspect I have a bad wire. But the real problem is it runs rough at idle, as if it was telling the MAP sensor the eng is hot. I replaced the map sensor. When I pull off the temp sensor off the drivers side manifold it shows O on the gage, this wire seems to ground out, its not the sensor, tested that. Any input on this????????????

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-18-2010, 11:30 PM
Registered User
 

Last journal entry: day # 6 1929 ford wheel and body mach up .
Last photo:
Join Date: Nov 2010
Location: sringfield tn
Posts: 16
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
run hot?

try checkin with thermomter have seen bad ignition swiches cause simler problems in those years everything from trans to tailamp problems /found problems in the colum it self in big blocks ecessive heat at exaust manifolds hard on wires /i always add exra quart of oil to prevent front rod and main damdge your probly beter off to go with manual gadge?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-19-2010, 05:06 AM
Registered User
 
Join Date: Aug 2006
Location: Alexandria, VA
Posts: 1,757
Wiki Edits: 0

Thanks: 4
Thanked 66 Times in 64 Posts
The stock temp sensor should be on the driver's side just above the exhaust manifold, and the other side should have the same sized hole with a plug in it.

I would add a mechanical temp gauge sender on the passenger side, which will give you a reading that does not depend on electrical grounding or power. When you compare the two gauge readings (electrical and mechanical), you should only have a few degrees difference. If not, then you need to troubleshoot the electric gauge until you get it to read accurately.

Bruce
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-19-2010, 02:31 PM
Registered User
 
Join Date: Nov 2010
Location: phoenix
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by cruisers
try checkin with thermomter have seen bad ignition swiches cause simler problems in those years everything from trans to tailamp problems /found problems in the colum it self in big blocks ecessive heat at exaust manifolds hard on wires /i always add exra quart of oil to prevent front rod and main damdge your probly beter off to go with manual gadge?
I found one temp sensor on the pass side reads 75 degrees from the drivers side so I'm going to replace it tomorrow. I' update than, thanks alot for the info.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-19-2010, 02:36 PM
Registered User
 
Join Date: Nov 2010
Location: phoenix
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by cruisers
try checkin with thermomter have seen bad ignition swiches cause simler problems in those years everything from trans to tailamp problems /found problems in the colum it self in big blocks ecessive heat at exaust manifolds hard on wires /i always add exra quart of oil to prevent front rod and main damdge your probly beter off to go with manual gadge?
Other than one temp sensor reading higher than the other, I found oil pressure wires were stripped at the cannon which could of been arching next to each other. So I hope tomorrow after I put in the temp sensor, I maybe can push it out of the shop. THanks
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
454 build - up ... opinions? 66GMC Engine 14 04-25-2011 08:46 PM
454 Getting hot Torque454 Engine 4 03-21-2010 01:14 PM
need help with my 454 build black_chevy Engine 9 12-09-2009 04:22 PM
454 in 72 gmc pickup djackson88 Engine 3 05-01-2009 01:10 PM
454 2bolt 289 block or 4bolt 454 1 piece seal to build a 496 heathj1 Engine 2 12-21-2008 10:22 AM


All times are GMT -6. The time now is 06:45 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.