Question about 1999 GMC Yukon

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Water leaking fron back of engin

I have water leaking from the right rear side of the engin. The heater core is not leaking. Is there a hose in that area that could be leaking or is it the freeze plug, if so how do I change that?

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  • jimbo401 Oct 22, 2008

    Good Call! It's the intake manifold gasket. I was afraid it was going to be something really bad. Thanks for the tip. Saved me alot of time and money.

  • Anonymous Mar 12, 2014

    Coolant leaking from hose back of engine, looks like it's one of the heater hoses, the leak is water or anti freeze. How do I go about fixing this problem. Very tight area to work in?

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  • 360 Answers

Its a intake manifold or the heater core return hose to the rear of intake

Posted on Oct 21, 2008

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  • 324 Answers

SOURCE: rear heater core line leaking, can I fix w/ rubber

yeah hose and clamps are the cheap easy way to go there, or if your lucky, the leak is right at the spot where the hose meets the metal and you can just cut the end off and put it back with the old clamp

Posted on Jun 27, 2010

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2 Answers

Why doesn't rear heater work?


Sounds like a blocked heater core. Could be different reasons. You get any check engine lights? If not, you may want to back flush the heater core by using a garden hose and adapter you can get at an auto supply store. You would hook up a running garden hose to the side that is cold and hopefully the prtessure would unblock any sediment or blockage.

Oct 20, 2015 | Cars & Trucks

2 Answers

My 1999 dodge caravan is still overheating. I have already replaced the thermostat and the water pump, also there is no heat. please help me someone!


Hi there.
Well you can either have a problem with either radiator outer {dust/dirt in outer core of radiator or clogged up inside were water goes, or soft hoses,blowen head gasket plus a few others ,but first go to garage to were you blow up your tyres and use the air hose and blow out the radiator core where the air goes in, 2 drain out radiator water and then refill with water at 1 ltr at a time and then check your info car book and find how much water the radiator takes ,if it dosent take all the ltrs then the radiator is blocked inside.
if engine runs rough missing etc then get your Head gasket checked out.
When you say no heat is that with heat on gauge or no heat from heater, as it could be heater blockage same as radiator core. So let me know how you get on.

Feb 16, 2015 | 1999 Dodge Caravan

1 Answer

My 1998 Crown Victoria had steamed the passenger side windshield, digital thermostat never indicated that the engine was hot, i smell antifreeze, water leaking inside passenger side by glove box and a


It sure sounds like the heater core, especially if you have water leaking inside the cabin. The two heater hoses only go from the engine to the firewall, and do not go into or through the firewall. They connect to the heater core right at the firewall.
Check carefully around the back side of the engine and the heater hoses, though. If a freeze plug is leaking, water will be dripping off the bottom of the engine. If it is leaking before the firewall, that would not be the heater core.

Nov 20, 2013 | 1998 Ford Crown Victoria

2 Answers

Water leaking onto passenger side floorboard,soaking the carpet


Your heater core has developed a leak - the wetness on the passenger side carpet is engine coolant
from a heater core leak, or a leak in one of the two hoses connected to the back of the heater core.
Your strategy: disassemble dash down to heater core, determine whether you'll need a new heater
core or new hose (or new hose clamp), then replace the offending part.

Jul 20, 2011 | 2005 Chrysler Town & Country

2 Answers

Leaking antifreeze between firewall and motor on passenger side. just started when i tried to use the heater. could it be the heater core and where is it located


Could be the heater core, or where your heater hoses connect at the firewall. Heater core leak would more than likely put steam in the vents of you car when heater is on and hot and fan on. If the leak is just in the engine compartment, it`s a hose or a loose connection.

Apr 18, 2011 | 2002 Pontiac Montana

1 Answer

The water pump starting leaking my wife was trying to help and put two bottles of stop leak in the system after i replaced the timing belt and water pump the heater stopped working HMMM??? maybe.. could...


U can flush out the heater core by removing the heater hoses at the engine side and flushing clean water through both hoses.stop leak is junk,i would not advise using it,your right all it does is block the heater core.

Dec 15, 2010 | Plymouth Breeze Cars & Trucks

1 Answer

Overheating radiator on my 1997 EL Falcon. It seems to be leaking in the back of the engine on the passenger side which is causing the radiator to overheat and have hardly any water in it. I have replaced...


Your wasting your time and money doing that lot as your problem is either the heater hose on L/H/Side of engine split or leaking tap for heater or head gasket or the REAR CORE PLUG in rear of engine block rusty and needs replacing (dead centre of rear of block) but you will need to either use a mirror to see it or remove the engine and replace ALL welsh plugs.
Let me know how you get on.
Ron

Nov 24, 2010 | Ford F Cars & Trucks

1 Answer

Rear heater core line leaking, can I fix w/ rubber hose and clamps? The leak is right below drivers side door. There are four lines that run to rear heater core but only one is leaking.


yeah hose and clamps are the cheap easy way to go there, or if your lucky, the leak is right at the spot where the hose meets the metal and you can just cut the end off and put it back with the old clamp

Jun 27, 2010 | 2004 Chevrolet Venture Passanger

2 Answers

No heat,engine temp.is normal


the valve that allows the hot water into the heater core is not opening. most likely electronic issue. also check all vacuum and electric lines.

Nov 03, 2009 | 2000 GMC New Sierra 1500

1 Answer

Leaking Water Hose (not radiator hose)


it is the heater water supply and return, that supply water to the heater core to supply heat using hot water from the engine, the hose clamp my be loose or the hose has a hole in it you have to trace it from unner the hood fire wall to where it connects to the heater under the dash

Oct 27, 2009 | BMW 318 Cars & Trucks

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