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Now when it is running it runs rough.

Tiny
KICKMUD
  • MEMBER
  • 1986 CHEVROLET CAPRICE
  • 94,000 MILES
If my car overheated(and it wouldnt be the first time)and steam was coming from under the valve. Is head gasket going out. If I have to stop I have to put it in neutral or it will shut off. When im driving it, it moves just fine. I can get into the gas and it goes. I checked dip stick didnt see any oil. It didnt start running like this until overheated this last time, but this is also the first time steam come out from under valve cover.
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Friday, November 25th, 2011 AT 3:51 PM

7 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Are you sure that is steam and not oil fumes and mist?
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Friday, November 25th, 2011 AT 4:11 PM
Tiny
KICKMUD
  • MEMBER
  • 7 POSTS
I dont know. It look like steam. What if it was what you said. What would it be if it was steam.
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Friday, November 25th, 2011 AT 4:19 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
MIGHT NOT BE OILSAID THEY AIN'T SEEIN' IT ON THE DIPSTICK!

I THINK YOU ARE SUPPOSED TO KEEP OIL IN THOSE THINGS. AT LEAST UP TO THE MINIMUM MARK

PLEASE DEFINE. "RUNNING ROUGH" ---STAMMERING OR LOUD METALLIC SOUNDS?

AFTER IT COOLS DOWN ADVISE ON TO HOW MUCH WATER AND HOW MUCH OIL YOU HAD TO PUT IN IT TO GET IT BACK TO "FULL"

AND PLEASE LET US KNOW HOW OFTEN EACH ONE IS CHECKED TO BE THE CORRECT LEVEL

THE MEDIC
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Friday, November 25th, 2011 AT 4:23 PM
Tiny
KICKMUD
  • MEMBER
  • 7 POSTS
I meant that I didnt see any water on dipstick. It has enough oil. Running rough. It runs like it has a missfire, but thats only when sitting still. After I get up to speed it run fine. What could have happen when it overheated to run like that.
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Friday, November 25th, 2011 AT 4:36 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
BURNT VALVE(S), WARPED HEAD, WATER GETTING INTO THE CYLINDER(S), OTHER

IF THIS ISSUE STARTED DURING/ AFTER THE OVERHEAT, A COOLANT SYSTEM PRESSURE TEST, AND A COMPRESSION TEST MIGHT BE THE NEXT STEPS YOUR SHOULD SEEK

WRENCHTECH MAY HAVE OTHER GUIDELINES YOU MAY NEED TO LOOK INTO.I THINK HE'S A CHEVY KINDA GUY

THE MEDIC
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Friday, November 25th, 2011 AT 5:25 PM
Tiny
KICKMUD
  • MEMBER
  • 7 POSTS
Lets take the overheating out of it. What would make it idle rough and shut off when you stop besides a tune up. What kind of sensor or relays would make it do that.
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Friday, November 25th, 2011 AT 6:55 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
When you overheated it, it may have blown a head gasket.

You need a leak down test from a shop to confirm. This will tell for sure if you damaged anything inside the motor.

Roy
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Friday, November 25th, 2011 AT 7:07 PM

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