Question about 1994 Chevrolet C1500

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I have 1994 350 K engine in my '86 S10 Blazer. How do you route the heater hoses off the firewall (2 fittings)? Thanks I found 1 fitting on the top of the water pump. I am still missing 1.

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The return hose connection could be at different locations on the block.put a garden hose to the water pump fitting & turn it on,you'll soon see it!!

Posted on Sep 24, 2009


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1 Answer

How do you get to the hoses to the heater core

From under the hood. The hoses go into the firewall behind the engine. Loosen the hose clamps and pull the hoses off, right at the firewall. The two brass fittings the hoses connect to are the fittings on the heater core.

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1 Answer

Is the fitting and hose that comes from the rear top of my engine and runs into the passenger side firewall to the heater core?

Sounds like it may be?
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How do I bypass the heater on a 1990 mb 300ce

find where the 2 1 inch hoses go into the firewall. Remove the clamps that hold them to the fittings on the firewall and remove hoses. Get a "U" or "heater bypass" kit from the parts store and install it into the ends of the 2 hoses.

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1 Answer

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If it's a heater hose, it will go to the firewall behind engine, where it connects to the heater core's fitting that juts out from firewall. Hose goes over that fitting. Heater hoses are fairly easy to replace, maybe not so easy on yours, due to lack of space. Drain the coolant before taking off hose, loosen clamps on it, then start pulling it off. Watch for a hose holding bracket that also needs to be removed before hose is completely free. Some do, some don't have such a bracket. Hire a neighborhood kid that works on cars to replace it, as sometimes that hose to heater core fitting can get stuck on tight, and if one starts yanking or pulling on it, you can break the fitting and will then need a new heater core-big expense to replace. Good luck and merry christmas in capital letters, lol.

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1 Answer

Where is the drain tube on a 1997 blazer S10

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I need to bypass the heater core on a 95 chevy blazer

You need to look under the hood and you will see the two heater hoses up near the firewall. All you have to do is conect the two together not allowing them to go into the interior of the truck. Once you do this the heater core is by-passed.

Oct 15, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

1989 chevy hearter coral needs to repair?

In the engine bay on the passenger side against the firewall. Follow that which should lead to 2 nipple fittings or 2 tubes where the hoses connect to the engine. Replace the hoses when you replace the heater core. If you try to replace the hoses later, you may break the fittings at the heater core because they have minimal flexibility.**Please rate me on this answer**

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Will a 1985 S10 blazer tilt steering collum fit a

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1 Answer

How to replace heater core on 1997 Buick Skylark

You will need a piece of pipe about 2" to 3"long that will fit inside the diameter of the two heater hoses at the firewall and two hose clamps. (1)disconnect the two hoses at the firewall; (2)slip a clamp on each hose; (3)slip the piece of pipe into both hose ends to connect the two hoses together; (4)install and tighten clamps on each end of hoses over pipe. (You might want to put a little grease on the pipe for easier removal when you are ready to install new core.) Start engine and check for leaks at the connections.

Nov 06, 2009 | 1997 Buick Skylark

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