No heat?

black2001gt · March 25th, 2011, 03:41 PM

I was driving the other day, and saw that my intake manifold cracked were the heater core hose goes into the intake manifold. So i bought the new replacement one from ford. I installed it today and I have no heat, and the heater core hoses are cold? I drove it around for 20 mins and it didnt overheat. What could it be?

F8L GT · March 25th, 2011, 03:42 PM

sounds like your have an air pocket in the system not allowing the fluid through. Try and purge all the air out of the cooling system

black2001gt · March 25th, 2011, 03:43 PM

How would I do that? Sorry I am a noob.

F8L GT · March 25th, 2011, 03:45 PM

one way is you can take the cap off and let it run and run and run. PM blown4vgt. I believe thats the way he did his. I have a took that uses compressed air and creates a vacuum to purge the air out

black2001gt · March 25th, 2011, 03:48 PM

How long should I have it run for?

03_StangGuy · March 25th, 2011, 03:51 PM

You need to run the car and put the heat on high. this will help pull coolant through the system. Keep an eye on the over flow, you'll prolly need to top it off. Lastly, just cuz the gauge doesnt say it hot doesnt mena its not. If theres no coolant on the sensor it can take too long to tell you its overheating.

black2001gt · March 25th, 2011, 04:18 PM

Should I try replacing the t stat?

03_StangGuy · March 25th, 2011, 08:25 PM

Thermostat wont affect the heat, that just opens and closes the ssystem to the radiator. did you purge the system?

black2001gt · March 25th, 2011, 09:30 PM

Yes I did and the heater core hoses are still cold.

black2001gt · March 26th, 2011, 03:26 PM

there isnt any pressure in the system

F8L GT · March 26th, 2011, 03:29 PM

Originally Posted by 03_StangGuy

Thermostat wont affect the heat, that just opens and closes the ssystem to the radiator. did you purge the system?

thermostate does to effect heat. If its stuck open, the coolant wont stay in the engine to warm up, it will just keep circulating and take a long time to warm up.

black2001gt · March 26th, 2011, 03:35 PM

Could it be a weak water pump

03_StangGuy · March 27th, 2011, 10:23 PM

Originally Posted by F8L GT

thermostate does to effect heat. If its stuck open, the coolant wont stay in the engine to warm up, it will just keep circulating and take a long time to warm up.

Tru but you would get heat. there would also be water in the upper hoses. In this case I dont think the thermostat is the issue.

March 25th, 2011, 03:41 PM	#1
black2001gt Newbie 2001 mustang gt 13.919@100.81 Join Date: Mar 2011 Location: bridgeview il Posts: 22 iTrader: 0 reviews	No heat? I was driving the other day, and saw that my intake manifold cracked were the heater core hose goes into the intake manifold. So i bought the new replacement one from ford. I installed it today and I have no heat, and the heater core hoses are cold? I drove it around for 20 mins and it didnt overheat. What could it be?

March 25th, 2011, 03:42 PM	#2
F8L GT !FACEPLATED! 2002 Mustang GT 7.84 @ 86.01 Join Date: Jul 2008 Location: Upper Michigan Posts: 12,917 iTrader: 13 reviews	sounds like your have an air pocket in the system not allowing the fluid through. Try and purge all the air out of the cooling system __________________ MM Bracket Racing Crew Co-Founder ~Its a Drag Car, Not a Show Car~ LINK-->Custom Race Transmission Build<--LINK

March 25th, 2011, 03:45 PM	#4
F8L GT !FACEPLATED! 2002 Mustang GT 7.84 @ 86.01 Join Date: Jul 2008 Location: Upper Michigan Posts: 12,917 iTrader: 13 reviews	one way is you can take the cap off and let it run and run and run. PM blown4vgt. I believe thats the way he did his. I have a took that uses compressed air and creates a vacuum to purge the air out __________________ MM Bracket Racing Crew Co-Founder ~Its a Drag Car, Not a Show Car~ LINK-->Custom Race Transmission Build<--LINK

March 25th, 2011, 03:51 PM	#6
03_StangGuy I Poop Entirely Way Too Much Blown 03 GT Join Date: Jun 2007 Location: Long Island NY Posts: 6,917 iTrader: 0 reviews	You need to run the car and put the heat on high. this will help pull coolant through the system. Keep an eye on the over flow, you'll prolly need to top it off. Lastly, just cuz the gauge doesnt say it hot doesnt mena its not. If theres no coolant on the sensor it can take too long to tell you its overheating. __________________

March 25th, 2011, 08:25 PM	#8
03_StangGuy I Poop Entirely Way Too Much Blown 03 GT Join Date: Jun 2007 Location: Long Island NY Posts: 6,917 iTrader: 0 reviews	Thermostat wont affect the heat, that just opens and closes the ssystem to the radiator. did you purge the system? __________________

March 25th, 2011, 03:43 PM	#3
black2001gt Newbie 2001 mustang gt 13.919@100.81 Join Date: Mar 2011 Location: bridgeview il Posts: 22 iTrader: 0 reviews	How would I do that? Sorry I am a noob.

March 25th, 2011, 03:48 PM	#5
black2001gt Newbie 2001 mustang gt 13.919@100.81 Join Date: Mar 2011 Location: bridgeview il Posts: 22 iTrader: 0 reviews	How long should I have it run for?

March 25th, 2011, 04:18 PM	#7
black2001gt Newbie 2001 mustang gt 13.919@100.81 Join Date: Mar 2011 Location: bridgeview il Posts: 22 iTrader: 0 reviews	Should I try replacing the t stat?

March 25th, 2011, 09:30 PM	#9
black2001gt Newbie 2001 mustang gt 13.919@100.81 Join Date: Mar 2011 Location: bridgeview il Posts: 22 iTrader: 0 reviews	Yes I did and the heater core hoses are still cold.

March 26th, 2011, 03:26 PM	#10
black2001gt Newbie 2001 mustang gt 13.919@100.81 Join Date: Mar 2011 Location: bridgeview il Posts: 22 iTrader: 0 reviews	there isnt any pressure in the system

March 26th, 2011, 03:35 PM	#12
black2001gt Newbie 2001 mustang gt 13.919@100.81 Join Date: Mar 2011 Location: bridgeview il Posts: 22 iTrader: 0 reviews	Could it be a weak water pump

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