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Engine overheating?

Tiny
ISAACFEG
  • MEMBER
  • 2001 OLDSMOBILE AURORA
  • 12,700 MILES
Hi I have a 2001 Oldmobile Aurora and the overflow tank is boiling over but the engine is not overheating. I changed the thermostat, drained the coolant and refilled and changed out the overflow bottle as well. Now it is just coming out the overflow tube everytime I drive it which still means it is boiling inside the tank but I dont know why. Do you have any ideas for me? What would cause this? FYI the overflow tank is the only cap there isnt a radiator cap just in case that helps with anything.
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Monday, November 28th, 2011 AT 8:08 PM

57 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It is running hot otherwise the coolant will not boil. You need a leak down test to verify that there is not a head gasket issue. it sounds like either a head gasket or clogged radiator.

This guide will help confirm the problem.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please run down this guide and report back.

Roy
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Monday, November 28th, 2011 AT 8:14 PM
Tiny
ISAACFEG
  • MEMBER
  • 2 POSTS
Ok I will have to take it in and get it tested then, I doesnt seem to be running hot at all. As far as the tempeture gauge inside the car it never goes over half way and always seems to run where its supposed too.
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Monday, November 28th, 2011 AT 8:29 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Get this checked first. This will insure that there is no internal issues

Roy
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Monday, November 28th, 2011 AT 8:32 PM
Tiny
JACKIE BELL
  • MEMBER
  • 1 POST
  • 2001 OLDSMOBILE AURORA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
I have replaced the radiator, top hose and thermostat; had radiator power flushed and car continues to run hot when driven for more than 30 minutes. My car is a 2001 OLDS AURORA.
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
When you shut the car off after being hot, disconnect the fans by the radiator and just feel the radiator in different spots. If you feel cold spots then the radiator is bad as it should be the same temp all over. If not that have it checked for head gasket or intake manifold gaskets that are leaking.
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
BFOR1964
  • MEMBER
  • 15 POSTS
  • 1999 OLDSMOBILE AURORA
  • 144,000 MILES
The altenator went out replacing it I stripped the hole on the radiator to the transmission after replacing the radiator the car over heats. We took out the thermostat and ran the car without it; it still over heats. What should I do? I noticed the coolant coming out of the resivour once it heated up.
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Best re post the question with all details, the question is a bit hard to understand.
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
BFOR1964
  • MEMBER
  • 15 POSTS
After replacing the radiator the car over heated. The thermostat was then removed. We ran the car without it and it still over heats. What should I look at next?
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
I would be testing for a head gasket problem.
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
BFOR1964
  • MEMBER
  • 15 POSTS
Not the water pump then? Thanks
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
DMOSLEY317
  • MEMBER
  • 3 POSTS
  • 1999 OLDSMOBILE AURORA
  • 4.0L
  • V8
  • FWD
  • AUTOMATIC
  • 135,985 MILES
I have a 1999 Oldsmobile Aurora. I got the radiator hose replaced (was leaking) the thermostat replaced, and the radiator flushed and it overheats. The funny thing is that when I stop, turn the engine off then start it back up it cools down while it idles. I don't Knoknow what could be the problem please help
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
A chemical head check is a quick and simple test for a head problem, with coolant being expelled I am thinking that there is a build up of pressure in the system due to a combustion leak, a faulty water pump will not normally give you your symptoms, check the head gasket first. A faulty water pump expecially with no thermostat will not cause overheating as the natural thermal flow of water with no thermostat will over come any pump preformance problems.
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Does it overheat at highway speeds or only in stop and go traffic?
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+6
Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
BFOR1964
  • MEMBER
  • 15 POSTS
Does that mean a new engine altimatrly?
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
DMOSLEY317
  • MEMBER
  • 3 POSTS
Just in stop and go traffic. It's good in the highway
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+1
Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
No not at all, if head gasket is faulty, head gasket set and proberbly minimal head machining to rectify any warp, bend or cracks, all standard procedures.
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
The most common cause of in town overheating is a bad cooling fan. Does it turn on when the engine starts getting hot?
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-1
Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
BFOR1964
  • MEMBER
  • 15 POSTS
Thanks for the help.
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
DMOSLEY317
  • MEMBER
  • 3 POSTS
Yea I've seen it and heard it kick on but not sure if they are purposely cooling it off
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)
Tiny
BFOR1964
  • MEMBER
  • 15 POSTS
What type of pricing is it to have the head gasket done?
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Tuesday, June 30th, 2020 AT 12:31 PM (Merged)

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