SPONSORED LINKS

Overheats when it is idle?

Tiny
BUDDERS71
  • MEMBER
  • 2000 CADILLAC DEVILLE
  • 110,000 MILES
When I'm on the highway, the temp. Gauge reads normal and the heat works fine. When I slow down to a stop, the temp. Gauge goes up and and I start getting hot engine display on the dash and the heat blows out cool air. I get out to check the engine when it overheats and the top radiator hose is hot and the fans are running. What could be the issue I am having, and what should I do to repair this problem?
SPONSORED LINKS
Saturday, March 3rd, 2012 AT 1:40 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
There are a number of things to check but the most likely thing that will cause this is a thermostat.

However, here are a couple of guides that will help with this issue:

https://www.2carpros.com/articles/symptoms-of-an-overheating-engine

https://www.2carpros.com/articles/replace-thermostat

Assuming the thermostat is not the issue then we need to move onto the head gasket.

I have seen many of these things overheat at idle only when the head gasket is starting to leak.

So, if it were me, I would just jump straight to this issue and check the head gasket using this guide:

https://www.2carpros.com/articles/head-gasket-blown-test

Once we know this info we can go from there. However, I would make sure you use the chemical test when the engine is hot to ensure you test it when this is happening.

Thanks
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, February 15th, 2022 AT 11:26 AM

Please login or register to post a reply.

Related Engine Overheat Content

Is Your Engine Cool Enough to Check?
VIDEO
Is Your Engine Cool Enough to Check?
Instructional repair video
Overheating Symptoms
GUIDE
Overheating Symptoms
An overheating engine is never a good thing to have happen. If the problem is caught quickly you can save the headache of a major engine repair. Knowing the information from...
VIEW MORE

Sponsored links