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Over heating i just blow a hose and i replaced it, now my engine is running hot

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  • 7 Answers

Check that you have not got an air lock first, run the engine with your header bottle cap off, and check the hoses all round to see if one is cold where the rest is hot.
also check the hoses one might have a bleed nozzle on it.

What ever you do, do not put cold water in a hot engine you will most probably warp the head.

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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  • 2 Answers

SOURCE: 1992 Jeep Wrangler heater not blowing hot air

How often has the coolant been changed? My only guess is that it hasn't and the hoses and the heater core are plugged up with goo and a flush is needed

Posted on Dec 26, 2008

thunderalley
  • 432 Answers

SOURCE: engine over heats 2000 cadallic deville northstar engine

flush your radiator first.with the thermostat out you should see the water moving if not bad water pump.this engine needs the thermostat to function properly and either a 50/50 coolant or straight coolant so it does not boil over.also make sure your fans are coming on

Posted on Oct 04, 2009

  • 108 Answers

SOURCE: Air, no heat '98 Astro. No leaks, engine

It sounds to me that you may have 2 problems. 1). Air Lock in the Heater Core. 2). Inactive Heat Damper in the Plenum.

But since you state that the Heater Hoses do not get warm that is indicative of an Air Lock in the Heater Core. This is a relatively simple fix. It is best performed COLD but requires a method of pressurizing the Cooling System. All reputable Auto Parts stores Sell and/or Rent Pumps that temporarily replace the Radiator Pressure Cap for Leak tests and curing Air Lock. The Collant Level must be filled FULL then pressurized and then loosening the Highest Heater Hose at the Firewall so that Air and a Small Amount of Coolant escapes. Once all the Air has escaped tighten the Heater Hose Clamp, remove the Pressure Pump, Restore the Collant Level to FULL, re-install the Pressure Cap and Start the Engine. As it Warms up you should be able to feel coolant running through the Heater Hoses and they should become warm.

Posted on Dec 07, 2009

Tnsiouxfalls
  • 617 Answers

SOURCE: there is no heat blowing ou of the vens on my van

The water must be able to circulate and there are three main things to stop this from happening.Heater core blockage,thermostat and water pump.
After checking those you must look at the controls under the dash to see if a dampener door is remaining closed.The doors will shut off the heater core from air circulation when using the air conditioning and vice versa. After starting the van switch the controls for temperature from cold to hot and listen for the door to open and close.That's where I would start.Also you have a Heater Control Valve that shuts off all hot water from entering your heater core.If this valve is closed you would get no to very little heat.It's located in the heater hose from the intake to your heater core.

Posted on Dec 30, 2009

  • 1 Answer

SOURCE: Buick allure 2005 heater blow warm air, have to

The heater radiator had to be flushed twice at the dealership. No problem since then.

Posted on Jan 19, 2010

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2 Answers

I just replace a hose on my jeep larado 4.0 and now its running hot, no water in oil, no sighs of any enteral damage, just getting hot, over heating


check that you do not have an air lock...while the engine is running check the hoses to see if one is cold, run the engine with the header bottle cap off and if one of the hoses has a bleed nozzle then open it until you have continuous water running and not spitting.
Do not put cold water in a hot engine though, it can blow the head gasket.

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Before assuming the heater core is blown check the following.

1. Check coolant level while engine is cold.
2. Leave the radiator cap off and let the engine run. See if you can see the coolant circulate
when the engine is brought up to temperature.
3. Check the temperature gauge inside and note if the engine temp is correct.
4 Does the engine overheat?
5. Feel the heater hoses and check if they get hot.
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Follow the heater hose from the engine, and as you get closer to the firewall, you should run into it. It is in line with the hose, and should have a vacuum hose connected to it. Apply vacuum to the valve and it should move. If not, then replace the valve. If there is no vacuum when engine running and heater turned on, then check the hose for leaks or the vacuum source.

Feb 11, 2011 | 2000 Lincoln LS

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Replaced thermostat, cleaned heating coil still wont blow hot air in 2001 sble


is heater core have water flowing thru it ? if take haeter hoses loose at engine run water thru one hose see if flowing out the other one

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I just replaced my 3.4 liter motor in my 2004 monte carlo and I need to figure out why the other motor over heated and blew a head gasket. Before I replaced the motor the heater was blowing cold air and...


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1 Answer

AC blows hot air intermittanty


On the passenger side of the engine compartment near the radiator you will see a coolant control valve that has heater hoses running from it to the heater core inside vehicle.This is probably going bad.You can clamp off the hoses with some pliers while it is acting up and see if this stops the heat.If it does then it is probably bad.

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I have a 05 Nissan Sentra and it keeps running hot and the heat isn't blowing hot. But when Im under the hood the hoses runing from the radiator and thermastat; the top hose gets really hot while the...


Hey iisha, although obvious, 1st thing to check is the coolant level. If it's low, the engine will run hot and the low level prevents coolant from circulating to the heater core inside the car, so the result is little or no heat, but engine running hot situation. The top rad. hose takes hot coolant from the engine, it flows down thru the radiator where it is cooled (w/ help from the fan) and the coolant returns to the engine at a reduced temp. to keep the temp under control, and it's returned thru the bottom hose (the result is the bottom hose should be cooler thant the top. There's more involved than that, so 1st check your coolant level, if it's ok let me know I'll help further. Hopefully the fix is that simple, and it is a rather common problem.

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