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Relaced rad in my

Since I replaced rad I have no heat.i tried to bleed the air out by leaving the rad cap off it didn't work.can u tell me how to get the air out of the cooling system.

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  • Cars & Trucks Master
  • 3,103 Answers

Heater control valve may be stuck shut..look at the heater hoses or check the water pump for weak operation..

Posted on Jan 01, 2014

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Posted on Jan 02, 2017

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keemo68
  • 1263 Answers

SOURCE: 2002 V.W. Jetta 2.0 liter overheat

turn your heater on to max heat and high fan. then see if you can feel the hoses on the firewall for heat they should be hot. make sure that the fan unit on the radiatoris working if the upper radiator hose is hot the fans should be running if they are not that means that either the relay is bad the thermo sensor is bad or the fan unit is shot... please rate the solution..........thanks

Posted on Sep 24, 2008

  • 34 Answers

SOURCE: can't bleed coolant system on Audi A3!

In my experience with Audis, after any job requiring changing/draining the coolant the car ideally needs to be driven. With the coolant topped up to max drive the car, keep the revs up and shake the car with steering and over bumps where possible. Whatever you do make sure you take at least 2 litres of water/coolant with you, as as soon as the air lock goes, the level drops a lot and quickly. Also keep an eye on the temp gauge and avoid letting it go much over 90 degrees (over 90 on the gauge usually means its well into the hundreds) When you get consistant hot air through the heater, at idle, the level should of settled. If this doesnt work you may have thermostat issues or a blockage. Good luck, let me know how you get on.

Posted on Mar 26, 2009

wmarley126
  • 9 Answers

SOURCE: bleed air out of cooling system

you have air in the system

Posted on Jul 12, 2012

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I have no heat inside my cab on a 2003 dodge ram 2500. heater core is not blocked


either you have a bad thermostat or you have a air lock in your heater hoses remember your heater is fed by the hose by the upper rad hose return is the hose going to the water pump, to bleed the air out fill rad leave the rad cap off start engine run for 5 min. the check the coolant level,fill to top of neck replace rad cap tight, K-D tools make a special funnel to solve this air lock problem

Aug 09, 2014 | 2003 Dodge Ram Pickup 2500

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My 2002 buick century overheats and has no heat


Possible trapped in system. Bleed system, should have two small screw bleeders, one in front of left valve cover on pipe behind water pump and the other on coolant pipe outlet as you follow upper rad. hose towards engine. Engine cool, remove rad cap, open both bleed screws and fill rad until coolant flows free out both bleed ports. close both bleed screws, rad cap off, start engine and let idle until upper hose is hot to touch , shut off, let it cool down for 20 minutes, top up rad and install cap. restart car ,drive and check.

Jan 02, 2014 | 2002 Buick Century

1 Answer

Heat only works at above idle


is the thermostat good is prestone good the rad cap is this good you should have heat all time except if heater is plugged up or air in system check and test run the car till engine warms up or fan comes on with the rad cap off then see the level what its doing sometimes air gets in the system this will bleed it out

Jan 07, 2011 | 1999 Oldsmobile Intrigue

1 Answer

Put new radiator in,and no heat comes out,Could my hearter core be froze up.


You might consider bleeding out the air you might have in your cooling system after you opened it,drain it to replace radiator.Let it cool down open rad cap start engine watch the burps of air come up when air locks are out coolant starts to swirl as it circulates might drop fluid level to have coolant on hand to top up after wards shut it of with rad cap off let it sit for as long as you possibly can any remaining air locks will burp out.Once coolant completely down put your rad cap back be sure fluid is full reservoir as well.Now see if you have heat.

Dec 25, 2010 | 2002 Dodge Caravan

3 Answers

Had a leaking pipe changed the large pipe that runs from the front of the engine to the heater has two branch;s smaller bore since changeing no het getting to car.


possible air in your system you need to bleed air out of your system make sure heater valve is open and radiator cap open when car is cold take all air out and fill as needed

Jan 19, 2010 | 2001 Jaguar S-Type

2 Answers

New heatercore but no heat flushed system out but still no heat the dash gets hot but very little heat comes out when on for awhile the fan works just blows cold air


Did you run engine from cold, with heater on when you refilled the system? Try again, rad cap off, with heater on, and let engine get up to operating temperature, make sure you have good flow through rad ,leave cap off, until rad fan comes on to cool returning coolant to rad at least twice. Give engine a little extra rev, for 5 seconds or so, every once in a while to make sure flow getting through heater core, and add coolant as necessary. See if that helps, as it may just be an airlock in system. If your cooling system has any bleed screws incorporated, crack them once in a while as well.

Nov 05, 2009 | 2000 Oldsmobile Bravada

1 Answer

No heat


Have you tried replacing the rad cap ? or leaving the rad cap off while running your vehicle for a while to ensure that their is no air locks in the coolant system?

Jul 29, 2009 | 2004 Chevrolet Tracker

3 Answers

Overheating and no hot air from heater.


Leave rad cap off when starting from cold, turn heater(not defrost) on, and top up coolant in rad as you go, to about an inch or 2 from top of rad. Let engine run with cap off until your rad fan comes on & off 3 or 4 times. Every once in a while, rev engine slightly for 5-10 seconds to help bleed air out faster. After about 3 or 4th time fan comes on, you should be o.k. to put cap back on all the way & fill bottle to proper level. Heat should be there now. Give it a try & let me know how it goes.

Mar 29, 2009 | 1998 Ford Contour

1 Answer

No heat, replaced thermostat,water pump,heater core, all hose ok


When you put your hand on the inlet & outlet heater hoses are they both hot to the touch ? I mean 'ouch' hot, not just warm.
You might have an 'air lock' in the system if they are only warm, or temp feels quite different between them.
If possible, leave the return heater hose loose, start engine, let it warm up then bleed the system using return hose for a minute or so.
KEEP rad full while bleeding.
tighten hose, then watch the radiator fill hole for signs of air bubbles or frothing coming up thru antifreeze.
If either are present, you may have compression leak !
Another check for compression leak, is put rad cap on, drive around the block twice, let vehicle cool down then slowly remove rad cap & smell at filler hole as cap comes off.
compression leak will smell strong & burn eyes.. & we both know there is only one cure for that situation !!

Mar 02, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Rad has air in it


START THE ENGINE AND LET IT WARM UP WITH THE RADIATOR CAP OFF. DO THIS FOR ABOUT 5 MIN. REPLACE THE RADIATOR CAP AND REMOVE THE OVERFLOW TANK CAP. LEAVE IT OFF FOR ANOTHER 5 MIN. THE SYSTEM WILL BURP ITSELF.

Dec 18, 2008 | 2001 Chevrolet Corvette

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