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Changing engine coolant

F250 4.2deisel changing coolent airlock

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  • Cars & Trucks Master
  • 3,103 Answers

When refilling it..fill to upper level in the radiator..not the reservoir..run the motor and watch the level drop ..may take some time.. 15-20 minutes .. then add as needed.. do not overfill..then add to full mark on reservoir.. once done.. it should be ok..

Posted on Dec 25, 2013

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Posted on Jan 02, 2017

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6.0 loosing coolent over heating no coolent in oil hose have ben changed


coolant in oil is BLOWN HEAD GASKET at the very least,dont keep driving it you may COOK the engine then your into serious repair costs

Mar 26, 2014 | 2006 Ford F-250 Super Duty

1 Answer

The heatgauge climbed, switched off the car, checked the coolent bottle was empty, put in coolent car ran fine, why did the coolent run empty?


These cars are prone to small water leaks either within the block or around the radiator base. They are also difficult to refill correctly when the system has been drained as they will appear full but are really only part full due to airlocks caused by the system having hoses at higher levels than the fill point. Now you have refilled the system - watch the header tank for level - if it loses water at a very slow rate and you cannot find where the leak is - it is probably internal to the engine. Exactly what I had on my daughters mini !! .... I used ''K Seal'' in the end and have had no trouble or loss since. Make sure you check the coolant mix is still correct - as you have been adding water and this will dilute it ! .............. Hope this helps - good luck !

Apr 19, 2011 | 2006 Mini Cooper

1 Answer

How to change my thermatsat


Should be located in a removable housing at the engine end of the upper radiator hose
Drain approx. 1 gallon of coolant from the radiator
Remove housing
Note how thermostat is installed
Clean both surfaces
Replace thermostat and gasket
Re-fill coolant slowly to prevent an airlock
Start engine and look for leaks
Run engine to normal operating temperature with heater onm
Re-check coolant level



Dec 11, 2010 | 1993 Volkswagen Passat

1 Answer

Need to change coolent in radiater ,does this take a special kind of coolent and do i need to use a special type of radiater flush. Also is there a drain on the radiater?


You don't need to use a special kind of radiator flush, but the coolant is called DEX COOL. It's made by prestone specifically for GM engines, you can get it at walmart for like 5 bucks.

Feb 04, 2010 | 1998 Cadillac Eldorado

1 Answer

Coolent system fault symbol Audi A6


1998 Audi A6 2.8

It could be that the thermostat is stuck in the open position thus providing maximum coolant flow through the engine when the engine is still cold, ie from a cold start. (The thermo should close when the engine is stopped and cold and it opens up once the coolant temp increases and the engine has been running for a few minutes.) Once the engine is hot maximum coolant flow between engine and radiator is normal.

Do you also find that your heater takes a while to provide warm air to the cabin in winter when you notice this condition?

If you do not know when the thermostat was last changed then I would suggest you change it. ( If it malfunctions and sticks in the closed position you will really have a problem). The radiator/engine coolant could no doubt do with a flush and change in any event as it should be done every 2 years. If you don't know when it was last done - do it. Cooling systems tend to be a neglected part of essential vehicle maintenance.

Cheers
Sean
Voluntary contributor.

Dec 14, 2009 | 1998 Audi A6

2 Answers

My engine light when on in my car yesterday and my friend has one of those things that can scan and tell you whats wrong it said my coolent temp below thermistat regulating temp and where where you pull...


Hi:
Your coolant temp sensor was not reading right, and is a sensor that adjusts your eng timing. I would keep an eye on your coolant level. That would be a bigger concern, figuring out if you have a leak. If the cold comes back, you need to change out the coolant temp sensor.

Nov 24, 2009 | 2005 Pontiac Grand Prix

2 Answers

1997 Jeep Grand Cherokee Orvis with overheating problem


There may be coolant in the reservior but it doesn't necessarily mean there's any or enough in the main cooling system. If the radiator has a pressure cap, try replacing it with a known good one. Check and replace any coolant hoses that are kinked, or collapsed. There may be an airlock in the system - bleed it in accordance with the manufacturers instructions. Try flushing out the radiator and cooling system and then refill with the appropriate antifreeze / water mix ensuring that no air locks remain.

Jun 11, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Coolent light and check engine light


Your thermostat will not affect the heat in your car. This is controlled by the heater core which is pulled from coolant from the engine where the coolant will be the hottest. Your thermostat opens and allows the coolant from the engine to circulate into the radiator and the coolant from the radiator flow into the engine. A thermostat is cheap and easy to replace. The sensor should be a fairly inexpensive and easy replacement as well. I would change out the sensor first because bad thermostat would create an overheating problem.

Nov 20, 2008 | 2000 Pontiac Grand Prix

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