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Where does this hose go?

I just replaced the heater core in my 2000 S10 Blazer. While reattaching the inner fender well, I noticed that there was a hose dangling from the coolant reservoir that must have come loose after getting jostled around. I'm not sure where it's supposed to go. It's the top hose that comes out near the cap, not the bottom one that goes to the radiator.

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  • Chevrolet Master
  • 975 Answers

It's the overflow tube,nothing will come out unless it overheats,just heads for the ground,think there is a little plastic clip on the reservoir then to the pavement.

Posted on Dec 29, 2013


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Posted on Jan 02, 2017

  • 217 Answers

SOURCE: heater core hoses

intake hose to top

Posted on Jan 18, 2009

  • 488 Answers

SOURCE: I have just replaced the radiator, thermostat, and

Hi Adrian, If you are getting water/coolant around the sump pan it sounds like you have a leaky core or welsh plug.. This is a large disk which is used to seal the holes made when the engine and cylinder head was cast.. They do corrode and leak but are very easy to replace. However, getting to them can be an issue sometimes. My advice is to have the cooling system pressure tested, this will show the leak quite easily.. You can purchase a cooling system pressure tester from your local parts store or you can take the vehicle into your local mechanic who should be able to do this test for you. If you do this yourself, NEVER exceed the pressure printed on the radiator cap and you may induce leaks due to excessive pressure. Normally, pressure testing is done at around 13 to 15 PSI..and dont forget to keep the cooling system topped up during testing as the coolant level will drop during the test.

Posted on Nov 02, 2009

  • 2418 Answers

SOURCE: Poor coolant flow through heater core. Heater core

on some GMC models there is a valve that opens when you turn on the heat inside. It is called a heater control / actuator valve, it works off engine vacuum thru hoses connected under the dash, and going to the top of the valve. Now junk and crud and old rust will get in the valve and restrict it's flow. You will have to pull the valve off and clean it, but it is best to replace it, seeing it is hard to get all the junk out of it.
It looks like a L shape pipe with a hose on top & bottom, black plastic,and a smaller line on top mounted close to the wheel well about even with the exhaust manifold on the pass side. Drain the coolant, remove the valve and see if this is the cause, lots of gunk in the one hose. It is not real hard not real easy to replace this valve. Now if your truck does not have this valve check the pipe that the hose hooks to on top of the engine, remove the hose and see if a small screw driver will go down inside or if it is stopped up. .

Posted on Dec 07, 2009

  • 4669 Answers

SOURCE: no heat top radiator

Have you tried backflushing the heater core?

Posted on Nov 04, 2010

  • 335 Answers

SOURCE: 1999 mercury grand marquis occasionally overheats,

Check the antifreeze for oil, pull your dipstick out, see if antifreeze is in oil or smells sweet or over full, sounds like you may of a bad head gasket. You can also check this by having a compression test done on the cylinders.

Posted on Feb 20, 2011

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Heater core replacement 98 chevy S10 2.2L engine

Tyrone, Check the attached links,instruction and guides, the last link has some very good info. and pics. on S10 heater core replacement. Good luck.
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Take it to somebody that noe,s what there doing,It is not a easy job to do, If you never done it before,End take a long time to do it,

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a common V6 failure is the intake manifold gasket. coolant will usually leak behind the water pump on the drivers side, however it can leak at other locations on the intake manifold gasket.

coolant leaks from other areas include the heater core, hoses, expansion plugs, trans cooler, and coolant overflow tank.

Jan 03, 2011 | 2000 Chevrolet Blazer

1 Answer

I have a 4x4 4.3 V4 2000 Blazer, I have a problem, on the co-pilot seat floor, it seems to get soaked every now and then, and the engine coolant recipient level starts going down, Are there any hoses...

Yes! There are Heater/AC Hoses on the passenger side. Your hose connections may be leaking, or the hoses themselves may be leaking. The Heater Core itself could be leaking. It is best to remove the Glove Box and Dash components on the passenger side including the lower kick panel and expose the Heater Core to find out where the leak is coming from.
It could be as simple as tightening a hose, or hose replacement, or replacing the Heater Core itself.
Let me know if this helped.

Feb 18, 2010 | 2000 Chevrolet Blazer

1 Answer

Where is the heater contol valve on a 1998 chevy s10 blazer. i get very little heat

There isn't one. There is always coolant flowing through the heater core. The blend door controls all of the heating and airconditioning.
Make sure the heater core is free flowing, most of the time the core gets plugged with rust and slug and does not allow coolant to flow through. You can take the hoses off the core and try and back flush it with a gardan hose.

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you can either replace the heater core or bypass the heater core by removing the hoses from it & splicing them together

Oct 11, 2009 | 2000 Chevrolet Blazer

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1988 Chevy Blazer Heater Core Replacement

first determine if the heater core is located high or low by raising the hood checking against the firewall {by following the heater hoses to the fire wall} if it is high need to remove the dash. if it is low get on your back and start removing clips and screws no special tool needed.

Feb 14, 2009 | 1998 Chevrolet Blazer

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How do you remove the heater core frm a '99 chev S10 Blazer ZR2?

i think the inner fender and right front wheel has to come off there are bolts from under the hood that have to come outgood luck.

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