Question about 1995 Isuzu Trooper

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When I bypass my heater cor water comes out of the inlet and out outlets to the core

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It will until the core is empty.

Posted on Nov 18, 2009

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1 Answer

Monte Carlo heater core


I don't know if top or bottom, but the heater core inlet will be the hose coming from either the intake manifold or a fitting on a cylinder head. The outlet from the heater core goes to the front of the engine, it goes into the water pump. I think all GM engines are like this, and almost all engine designs likewise. On a 1992 3.8L, for example, the heater core inlet hose comes from the intake manifold on the passenger side. The heater core outlet goes into a fitting on the water pump (lower front of engine).

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2002 nissan altima heater problem


have 2002 altima,blower works no heat at idle and very little heat when accelerating.I changed carbon cabin filter,made sure little gear under dash to temp knob wasnt broken,flushed and bled system.Nothing worked so checked hoses to heater core and found inlet hose was hot,outlet hose was not.So investigated this problem and came to conclusion heater core was clogged.An easy way to check is to get car to normal running temp. put on heater and blowers at full.Go under dash on passenger side where counsel meets firewall,this is where heater core core inlet and outlet aluminum tubbing go through firewall,you will be able to feel both tubes one closest to you is outlet, so if this one is not hot and and other is your heater core is clogged.I detached both inlet and outlet hoses to heater core from water control valve.Then I blasted water with waterhose and nozzle set at jet,first through outlet hose to blow gunk out,then through inlet hose until water runs clear.Reatach hoses fill and bled system.heater works great nice and hot!

Nov 10, 2012 | 2002 Nissan Altima

1 Answer

Remove heather core


Disconnect battery cable.
Partially drain engine coolant
Remove glove box
Remove A/C-heater programmer
Remove heater core cover
Remove inlet and outlet hoses from heater core
Remove 2 heater cor retaining screws.
Remove heater core
Reverse procedure to install
Fill cooling system
Perform air-mix valve adjustment procedure

Nov 27, 2011 | 1997 Cadillac DeVille

1 Answer

Theres a pipe on the left of the heater cor leaking water on my fire wall heater cor only has pips whats this one car runs hot


Your heater core has gone bad. You will need to replace it, or bypass it by running a bypass hoze across the water pump.

Sep 30, 2011 | 1996 Pontiac Grand Am

2 Answers

Thermostat and engine heat seem fine, seems that heat knob, gears and cable are all working fine, but have practically no heat from heater.....96 Dodge Ram 1500 4 x 4. No problems with ducts switching...


Hello. First, does the fan speed work correctly? When you put it in the high possition does the air come out faster?, if so, raise the hood, look back on the firewall, ( behind the motor ), and locate 2 hoses that are about 1 1/4 inch in diameter that both hook up to pipes on the firewall. This is your inlet, and outlet for your heater core. I suspect you will find that these hoses have been joined together to bypass the heater core. Often when a heater core is leaking people don't have the money to replace the heater core, they generally cost $300 to $400 and sometimes more, then you have to pay the labor, in some cases, to remove about half of the dash to get to the heater core. This repair can be expensive indeed, so, often people just bypass the heater core by joining the inlet and outlet hoses of the core directly together skipping the core altogether.
Good luck!

Jan 09, 2011 | Dodge Pickup Cars & Trucks

1 Answer

Where is heater control valve on 2003 dodge ram pick up


THERE IS NO HEATER CONTROL VALVE ON THE WATER HOSES. NEW HEATER CORE. INLET LINE right before heater core hot, outlet after core look warm. Burped cooling system 5 times with engine at operating temp. Installed homade burp VALVE right after heater core outlet(high part of hose). Still no heat. Removed water pump, impeller still in good shape not stripped off shaft. Removed heater core hoses flushed water thrue the connections on the block to the water pump INLET and outlet. flushed water thrue heater core and hoses. Going to put it back togeter today. Used known good gauge to check water temp for operating temp in test. 195 f

Oct 22, 2010 | 1997 Dodge Ram 1500 Club Cab

1 Answer

My car made a loud noise and then hot water and steam went on the floor. what could this be? should I bypass the heater core and how do I do it?


One could bypass the heater core by joining the two tubes inlet and outlet together with a U joint, but heater cores don't cost that much and after an aftermarket heater core is put in, they usually don't fail because of their all metal construction (vs. the plastic collars that break in the original equipment heater cores.).

Sep 18, 2010 | 1991 Chevrolet Cavalier

2 Answers

How do you bypass the heater core on a 1989 Chev. Camaro 5.0


take the inlet hose to the heater core and connect it with the outlet hose on the heater core, thus creating a by-pass. you may be able to follow the hoses back to the aterpump and engine block and make a shorter run of it.

Aug 28, 2009 | 1989 Chevrolet Camaro

2 Answers

Prizm overheats, heater core leaks, no heat


You can bypass the core or fix it that's up to you but I would change or remove the thermostat first. If it still overheats then start looking at the water pump and radiator. Hope this helps. Good luck.

Jun 09, 2009 | 1993 Geo Prizm

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