Jump to content
CaddyInfo Cadillac Forum

Engine Coolant Hot. Temp gauge peaks out

Recommended Posts

Gentlemen, Thank's for having me.

Issue: I have a 2000 DeVille,Northstar V8 with 97400 miles on it. I drive the car for @ 4-6 miles , and the temp gauge starts to go above the half way point. After 2 bars above the half way point I start to get the chimes and warning messages, like Engine Coolant Hot, Idle Engine , Turn Off AC, and Engine Hot. I have yet to see/find a coolant leak. I must have one because I have been adding DexCool to the surge tank.

Status: I had the Co2 test done on in the surge tank by 2 different wrench heads. However, I told them that I thought I had a blown headgasket. Sure enuff, both service shops said I did have the Co2 fumes in the coolant.

Action:Is there any other tests,checks,or troubleshooting I can perform to see if it may be something else causing this. I have taken the cap of the surge tank , and eventually,it did blast out. Will there be bubbles in the coolant when engine is cold? I just trying to check everything I can before chucking someone $3000.00..

great engine when its working, tough to work on. Car drives like nothing else , and I feel good when driving it. Its my first Caddie, and Im disappointed that something this major could happen to such a prestigeous name

Link to comment
Share on other sites

If you trust these shops, and they found combustion by-products you have a head gasket problem. NOTHING else can cause it

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...