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I have a 98 BMW 328 I and I'm trying to bypass the heater core... only problem is it has 3 outlets.. 2 of them run to the water valve...which hoses do I connect together

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6ya6ya
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Posted on Jan 02, 2017

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  • 140 Answers

SOURCE: bypassing heater core on 1993 audi 90

yes u can bypass the **** core. all you need to do is, take the two hoses going to the heater core, and take em off the heater core, take one hose comply off, and hook the other remaining hose were the other hose was hooked up at.. this will bypass your heater core, but keep in mind you will not have hot air in the cabin of the car..keith...

Posted on Mar 14, 2009

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wavoconqueso
  • 57 Answers

SOURCE: Heater core burned out and I want to bypass the coolant hoses.

Without knowing your car specifically I can suggest the generic way to do it. Locate the two heater hoses going into the firewall, probably on the passenger side. They're the ones that get hot and are about an inch + in diameter. Disconnect. Measure the inside diameter of the hose and purchase a short piece of galvanized or copper pipe (6 inches) at Home Depot. Connect both ends of the hoses to the pipe to form a loop. Secure the hoses so they don't land some place that would cause a problem.

I had this problem on an 85 Tbird. I had heard about a product called Bars Leak and tried it. It worked. No leaks and I kept my heater. You should be able to find it at any parts place at less than $10. Ground black pepper also has worked for me.

Posted on May 09, 2009

cj2176
  • 520 Answers

SOURCE: 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.

Posted on Jun 09, 2009

  • 1168 Answers

SOURCE: 2003 silverado. no heat in cabin. water hose to

Hello Harold.
The heater core on your truck has a restriction that reduces the flow to the point you have no heat.
You will need to remove the two hoses and flush out the core.
I use two pieces of hose to attach to the fittings on the core to add the flushing solvent and the water hose.
Try using a product that can dissolve calcium such as CLR or an acid based type to clear it.
Use hand and eye protection while you do this as inadvertent spray may get you during the process.
Flush it in both directions for best results.
Hope it clears your problem.

KL

Posted on Feb 09, 2010

BCAS1298
  • 3092 Answers

SOURCE: How do you bypass a heater core on the 2000 Chevy

Yes it can be done. look at your engine on it there will be two heater hoses coming from the engine to the heater, disconnect those two heater hoses at engine, with heater hose and two hose clamps, get the hose and clamp first at auto parts, install one end and the other end of same hose, where you disconnected the heater hoses from the engine, you have just by-pass the heater, hope this was very helpful.

Posted on Jul 14, 2010

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98 ford ranger no heat have changed thermostat water pump heater control valve


Maybe the heater core is plugged or you haven't bled it properly?
If the heater hose returning from the core to the water pump is NOT hot, while the hose going to the heater core from the thermostat area IS hot, then the heater core is plugged probably.
You need to remove the heater hose while cool,from the thermostat area and remove the hose from the water pump area (that's the outlet of the flow thru heater core) AND THEN take a garden hose with p-is-tol grip type sprayer,and blow water back thru the outlet hose out the inlet hose. This will blow any bad plugging material out the way it got in.
Don't apply too much pressure if it is plugged bad. The heater core isn't made to stand 50lbs. water pressure. don-ohio (:^)

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you may have a clogged heater core or heater core bypass valve may be stuck closed. bypass valve is usually on the firewall on one of the heater core hoses. if valve seems to be operating properly. you will need to let the vehicle cool down. disconnect both heater hoses. connect garden hose to one side of heater core let water run through one side and then the other side. if the heater core is too clogged it may need to be replaced.

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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.
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common problem is the water resivor cracks up at the bottom... it appears that your water level is fine because the car doesnt over heat but i am willing to bet that resivor doesnt have water to the top. The radiator will hold just enough water to keep it cool. I replaced mine 3 times the sulution is doing to sound weird but go to the junk yard and get one off a murcury sable. dont know why but the sables res doesnt crack like that

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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

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I have a 2002 pontiac firebird v-6 3800. The heater hoses run into a part that is attached to the motor. I am trying to find the name of the part so I can replace it or find an engine diagram for that...


Paul, if you mean "radiator hose" then the part is the thermostat housing.

Perhaps the part is the bypass valve, which causes the heated water to "bypass" the heater core if the core is restricted.

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it may be possible that your heater core was faulty and some has by passed it. open hood and check for incoming and outgoing heater hoses into firewall(dash of car). it is also possible that the heater core is plugged, try getting your cooling system flushed

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maybe you won't need to. On the fire wall you will see 2 hoses an inlet and an outlet.that go directly into the heater core. Sometimes the heater core is clogged. disconnect the hoses and use a water hose running at only a moderate flow. put it into one of the the inlet of the heater core and run water until you see clear coolant. Then do it on the outlet and run it until the coolant is clear. you are trying to remove any clogs the heater may have. if this does not work, check the heater control valve.move the temperature slider the one to control the temp inside the car. and see if you can hear anything move. Check to see what type it is it can be a vacuum controled vavle, or a cable hooked on to the valve or an electronic controled valve. if it is a vacuum controled valve, you can check to see if a vacuume hose is disconnected, if it is a cable type valve,check it by moving the temperature control inside the car open it and close it with your fingers if you can see it. But most likely it may be the heater core thats clogged.

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