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Heater core blocked.what 2 hoses on pump r 4 htr core?

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The two that go into firewall,for heater core,,most of them are on the passenger side or middle of firewall,,

Posted on Apr 03, 2011

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What should the temperature of the heater core inlet hose be?


heater hoses run from the rear of the block to the water pump. One hose into the heater should be hotter than the other because heat is transferred in the heater in the car. . The cooling system draws water from the bottom of the radiator ( water pump inlet)which is always cooler than the top hose and dispenses it throughout the engine and heads including the heater core. It is then pushed past the thermostat with all the heat from the engine to the top of the radiator where it is cooled down by the air passing through the radiator . Check that the air vent for the cabin is set to recirculated cabin air and not fresh air from the outside as it will require recirculated air to increase in temperature to work properly

Nov 14, 2014 | 2006 Pontiac Grand Prix

1 Answer

Change heater core water pump one pipe get hot


try some comma's?
my wild guess, is you are trying to fix a dead cab heater, right?
and if so, can be caused by 5 things wrong. total.
1 engine coolant not hot (180F or more)
2; fan dead.(cab heater fan)
3:or core , coolant path blocked. (seems you)
4; core exterior core blocked with leaves or pin needles. (sucked in)
5: optional core valve , stuck closed. (cable bad, etc)\



one pipe hot , means ,? core pipe 1 is hot, and other is dead cold?
this flow blockage , bingo !

if pipe 1 is 180F and other is 120f this is normal the heater is heating air in the cab and is dropping due to this heat exchange. (normal)
so why not do the 2 year full flush service now. (skipped i bet)
core hoses:
remove the 2 hoses on engine side, never core side (easy damage)
then back flush both hoses. with a garden hose.
if there is a valve there, test it and make sure it's opening... and free flowing.
and that both engine water ports are open too, from heater hose
to engine. (yes, they pack up too)

Dec 07, 2013 | 1998 Toyota Camry

1 Answer

98 grand cherokee little heat.heater hoses hot top rad warm bottom is cold collant barely luke warm


While it doesn't seem likely, if you've changed, or had the thermostat changed.... I'd say you got a faulty thermostat. I am curious as to what your temperature gauge says the temperature of the engine and coolant is.. If your gauge is showing hot, I can think of two more possibilities... the water pump isn't pumping right... and, if the water pump isn't working right, the problem can be a cracked head or block, which can cause an airlock in the coolant system. Check the coolant or radiator cap.

Nov 14, 2013 | 1998 Jeep Grand Cherokee

1 Answer

Have 1995 chevy pickup htr want get hot little warm accuators are woring right fluhed rad,htr core an changed cap got any idea


flush heater core take hoses off motor or hearer core flush one hose at a time till water runs clear

Feb 08, 2011 | 2003 GMC Envoy

1 Answer

The blower and fan work on my 1998 Jaguar xk8, but no heat. What could be the problem?


3 possibilties(1) Bad secondary water pump motor.Its located on left side inner fender by firewall under hood.The pump looking thing with 2 heater hoses and 1 cable connection (2) heater valve near secondary pump, 4 hoses 1 electrical connection.Power on to shut water off to heater. (3) blocked heater core.

Dec 13, 2010 | 2006 Jaguar XJ8

1 Answer

HOW DO U GO ABOUT PUTTING IN A HEATER CORE. NEED


1. drain coolant
2.remove instrument panel
3. for 5.4 (4v) if equiped,remove junction splash shield
4.for 5.4 (4v) if equiped, disconnect starter relay cable9ad8eea.gif
  1. For 5.4L (4V), if quipped, remove junction block bracket.
  2. Clamp inlet and outlet heater hoses.
  3. Disconnect heater hose from heater core by gently pressing it toward heater core.
  4. Remove A/C plenum demister adapter.
  5. Disconnect vacuum line.
  6. Remove 13 plenum chamber top screws.
  7. Remove blend door assembly from case.
  8. Remove heater core.
To Install:
NOTE: If needed, clean and lubricate coolant hoses with plain water.

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  1. Install heater core.
  2. Install blend door assembly to case.
  3. Install 13 plenum chamber top screws.
  4. Connect vacuum line.
  5. Install A/C plenum demister adapter.
  6. Connect heater hose to heater core.
  7. Release all clamps from inlet and outlet heater hoses.
  8. For 5.4L (4V), if quipped, install junction block bracket.
  9. For 5.4L (4V), if quipped, connect starter relay cable.
  10. For 5.4L (4V), if quipped, install junction splash shield.
  11. Install instrument panel.
  12. Refill engine coolant.
I hope this helps you

Nov 12, 2009 | 2000 Ford Expedition

3 Answers

I cant afford to fix heater core at this time so how do i identify hoses to bypass


http://www.chiltonlibrary.com/ContentViewer/CVFrameset.aspx
Here is a link for you if you want to replace the heater core your self with common tools. As for the heater hose, you should see two small radiator hose going to the fire wall. You can disconnect the hose from the fire wall and connect them together, this will by pass the heater core till you replace the bad core. Good luck and keep me posted, be glad to know your expedition is running 100% again.

Nov 04, 2009 | 2000 Ford Expedition

1 Answer

1990 G-20 Htr core frt bypassed, what is correct routing of


there should be 3 places where the hoses connect on the Tee, see what ones are looped -one into the other, the heater core goes on these 2 in & out, the other goes to the rear air if equipped, such as in a conversion van.

Oct 03, 2009 | 1994 Chevrolet G20

1 Answer

Heater not working


I would check if your vent to the outside is open. If it is I would check the vacum hose that controls the vent to open and close.

Jan 27, 2009 | 2001 Saturn SL

1 Answer

Defrost will not come out vents


Check your coolant level first. Next check your heater control valve. With engine at operating temp and heater on high, do this:

1. Heater hose from water pump should be hot (if not, water pump may be dead or thermostat is stuck closed)
2. Heater hose from thermostat housing should be hot (if not, thermostat may be stuck closed or water pump is dead)
3. Heater hose going to heater core should be hot ( if not, heater control valve is not getting vacuum from heater control unit, or valve is broken)
4. Heater hose returning from heater core should be hot (if not, heater core is blocked, undo both hoses to core and flush with water hose until clear)

Test thermostat: with cold engine cranked, watch water temp gauge. As it gets hotter and hotter, when the thermostat opens, the temp should drop suddenly and then go back up.

Test water pump: with engine at operating temp. Squeeze top radiator hose tight, when you release it, you should feel/hear a surge of water. It is much like when you pinch a water hose closed and release it.

Test vacuum from heater control unit to heater control valve: undue vacuum line from control valve. It should have a vacuum when pressed against you skin in addition to releasing the actuating arm on the control valve.

If there is no vacuum, a quick fix will be to disconnect the plastic actuator from the silver arm on the heater valve. This will let the hot water to always flow to your heater core.

Dec 17, 2008 | Jeep Cherokee Cars & Trucks

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