Question about 1993 Jeep Wrangler

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I'm looking to do a heater core bypass on my 93 Jeep Wrangler If I'm not mistaken is my top heater hose 3/4 and lower heater hose at 5/8?

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  • Jeep Master
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according to that jeep guy's youtube, yea

Posted on Apr 03, 2015

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Posted on Jan 02, 2017

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leetamara
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SOURCE: 94 jeep wrangler overheating

Have the cooling system pressure tested. If it holds pressure, that's a good thing. If it doesn't hold pressure, you may have a leaking head gasket. What may be happening is the crack in the head gasket could be blowing hot air into the cooling system causing it to overheat.

Posted on Sep 27, 2008

  • 1 Answer

SOURCE: HEATER CORE REPLACEMENT!

I have a 1993 Jeep Wrangler YJ...My heater core needed replacement when I bought it about a year ago. I made the mistake of taking apart the dash to get to the heater core. DO NOT DO THIS!!! It is actually 4 screws that you must take out from the inside of the engine compartment on the firewall. Then it will come right out. Have fun!!!

Posted on May 22, 2009

  • 1 Answer

SOURCE: 2000 Jeep Wrangler heater core

When I drive my 2000 Jeep Grand Cherokee I can hear water. I was told to blow out the lines of the heater core with a compressor. Where is the heater core located?

Posted on Jul 27, 2009

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SOURCE: how do I replace a heater core on a 1998 jeep wrangler

An addtion to the above Check to be sure the radiator level is full first.

Posted on Dec 01, 2009

BCAS1298
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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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2 Answers

1989 jeep wrangler keeps overheating


Fill the rad or overflow bottle right to the top and run the engine with no cap on,if you see a constant flow of bubbles your head gasket is leaking or you have a crack somewhere in the cooling system.

Jun 12, 2017 | Jeep Cars & Trucks

1 Answer

I need to know how to bypass a heater core to a 01 jeep wrangler, till I can replace the heater core


Bypass is simple. Remove both hoses at the firewall where they connect to the heater core. Install a four inch piece of half inch copper pipe between the hoses and use screw type clamps to tighten it up.
If you don't let the hoses drop down while you are working you won't loose much coolant (probably about a cup or so) but check level anyhow after running it for a few minutes.

Mar 23, 2011 | 2001 Jeep Wrangler

1 Answer

I have a 4cyl 1999 Jeep Wrangler. The heater only blows warm air, no hot air. I have back flushed the heater core with a garden hose and there was no clog. I have checked the t-stat and it is...


The key is the heater hoses. The top hose is the inlet for the heater core and the bottom is the return line. If the bottom hose is not hot, there is little flow through the heater core. It does not have to be completely clogged to reduce the heat output. The core needs to be flushed multiple times IN BOTH DIRECTIONS through the heater hoses. If this does not restore the heat, try a commercial/radiator flush. Many people have had alot of success by filling the core, through the heater hoses, with a CLR type product and letting it sit for 10-15 minutes to remove scale followed by a thorough flush.

Jan 08, 2011 | 1999 Jeep Wrangler

1 Answer

I have no heat on my 93 silverado. i have replaced the heater core,thermostat,and radiator. I checked the blend door while I had the heater core out and it works fine.With the heater hose that goes to the...


LOOKING AT HEATER CORE TOP HOSE COOLANT FLOW IN BACK OUT THROUGH THE BOTTOM HEATER CORE HOSE CHECK WATER PUMP BYPASS HOSE SEE IF IT GETS HOT.IF NOT COULD BE BLOCKAGE AT BYPASS HOSE FROM WATER PUMP OR WATER COULD BE FAULTY GETTING TOO WEAK PUMP COOLANT THROUGH SYSTEM.IF COOLANT GETTING HOT GOING TO HEATER CORE THE HEATER CORE AND COOLANT SYSTEM NEED FLUSHING OUT.

Dec 05, 2010 | 1993 Chevrolet Suburban

1 Answer

My 1998 jeep wrangler's heater is blowing cold air. what could be the problem?


You more then likly have a cloged heater core It looks and works just like your radiator but its smaller and its inside the truck under the dash board Check to see what your antifreeze looks like if its brown and rusty looking its probably the core You can disconnect the two 5/8 ths hoses from it out side on the fire wall get a couple of feet of heater hose cut it in half so you have two peices about a foot longplug them on the heater core then take a garden hose with a nozzle on it and try forceing water back and forth from one side to the other through the core this may claer the restriction out It dosen;t work every time but the alturnitive is to replace the core and on most vehicles this not an easy job although it may not be that hard to get to on a wrangler hope this helps

Nov 05, 2010 | 1998 Jeep Wrangler

2 Answers

2000 Jeep Wrangler 4.0 liter: Air conditioner drips condensate on passenger side floor. Is there a drain somewhere that could be plugged?


There is a drain tube on the lower part of the firewall that is probably plugged.Normally I use a pick to dislodge debris some use coat hangers but you must be careful not to poke at too hard and cause a freon leak in the evaporator core.

Jun 26, 2010 | 2000 Jeep Wrangler

3 Answers

Can I flush out the heater core on my 98 Jeep Wrangler with a water hose?


Sure, just cut pressure back if you have a lot of pressure in that hose, as your system usually runs 15-20 psi. You'll be ok, as long as one side is open. Make sure you reverse flush as well, it helps dislodge debris. If you plug lower tube, attach a hose to other, and use a funnel on that hose, or hold it up high, and pour CLR into core, and let it sit in there for a while, it will help loosen up calcium etc, that builds up inside core, before you flush it out. Just a suggestion, but I've done it on several to increase flow through core when idling to increase temperature in vehicle at idle.

Dec 21, 2009 | 1998 Jeep Wrangler

1 Answer

1984 Jeep CJ7 heater core leaking. '93 inline 6 motor. Wrangler dash. How to I remove the core?


  1. Disconnect battery ground cable and drain cooling system.
  2. Disconnect heater core hoses.
  3. Disconnect damper door control cables.
  4. Disconnect blower motor electrical connector.
  5. Disconnect water drain hose and defroster hose.
  6. Remove nuts retaining heater housing assembly to instrument panel. Remove heater housing assembly by tilting heater downward to disengage it from air inlet duct and pulling toward rear of vehicle.
  7. Remove heater core from heater housing.
  8. Reverse procedure to install.

Nov 17, 2009 | 1984 Jeep CJ7

1 Answer

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...

Mar 14, 2009 | 1993 Audi 90

2 Answers

98 jeep wrangler no heat


Try this disconnect the heater hoses from the heater core use a hose to backflush the core. Then reconnect and try again.

Oct 18, 2008 | 1998 Jeep Wrangler

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