Question about 1999 Jeep Grand Cherokee

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How do I fix my heater in my 99 jeep grand Cherokee

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Unfortunately JEEP is notorious for bad heater cores. Most people, when the core goes bad, bypass it by looping the heater hoses to simply recirculate the warm coolant back to the water pump instead of replacing the core. To replace the core requires disassembly of the dash, at a shop the price is several hundred dollars in labor to change out a $35 part. If you bought the jeep used? this is what I would look for first.

Posted on Nov 14, 2014

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  • 464 Answers

There are two systems to evaluate.

  1. Air Blows Fine but not Hot -> Check Thermostat and coolant level.
  2. No Air Blows -> Check Blower Motor, Blower Motor Resistor Pack and Blower Control in Dash

Posted on Nov 14, 2014

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5 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 27 Answers

SOURCE: HOW DO I CHANGE THE WATER PUMP ON A 99 JEEP GRAND CHEROKEE ?

At least you have the 4 liter 6. Once you get all the **** out of the way its like replacing a W/P on an "old school" engine, very much like a Ford or Chevy straight 6. 1) Remove radiator top retainer (the metal U that looks like its the top of the radiator (#13 or 14mm sockets I think). 2) To completely get if off you also have to remove the grill (4-6 phillips screws), then 3) unbolt it from the tubular bumper retainers underneath the grill. 4) DO NOT remove the latch cable - no need. 5) Remove the top bolts holding down the fan shroud. Lift the shroud off its bottom "tabs" and push over the fan. 6) Using #10mm socket remove fan from fan clutch, then remove bolts holding fan clutch onto water pump pulley. 7) Pull out shroud, then fan, then fan clutch. Be very patient, lots of wiggling may be needed. 8) Locate belt tensioner on idler puller below the Power steering pump. Losen very little the pulleys center bolt (10mm), then use a 10mm w/entension to losen the pulley's tension (use counter clockwise/normal rotation to losen). 9) Draw a diagram of the belt routing - you will Never remember it correctly otherwise. 10) Tap the w/p pully and pull if off - do not hit radiator fins! 11) Drain the radiator (clockwise/right rotation opens petoc from factory radiators - counterclock used on aftermaket rads). 12) Remove lower raditor hose at radiator, then at pump (it will be a challenge). 13) Remove upper radiator hose from rad and from thermostat housing. 14) losen the Rubber heater hose from the metal hose screwed into the W/P. 15) Remove 4 bolts from W/P (13 or 14mm I think). The one at the 4oclock position is longer than the others. One is hidden at 6oclock.
16) Remove 2 bolts (14-15mm??) on bottom of Power Steering mount - these go through the W/P case to the block. You may also need to losen the top PS bolts so the PS Bracket can be loose at the W/P case. 17) Wiggle the W/P out from under the PS bracket. and pull off. (16b if needed, remove the upper idler pulley near the A/C unit.) 18) Remove the Thermostat (upper hose return) housing. Scrape off old gasket. Replace with 160deg or 190deg thermostat. Use silicone on gasket. 19) Carefully use a 17 or 19mm box wrench to remove the metal heater hose return line from the upper part of the old water pump. Coat threads with spark plug thread antiseize and screw onto new W/P. 20) Install new W/P gasket w/silcone, be careful to Not block the water holes. 21) Slide W/P under the P/S bracket and jiggle into place. Hand thread one of the top bolts to hold the W/P in place. 22) Insert the P/S bracket bolts and lightly tighten. 23) Jiggle W/P around and insert other bolts, start with the 6oc hidden bolt. Add remaining bolts and tighten to 25 or 250?ftlb (about 3/4 past socket-snug). 24) Tighten ALL P/S bolts. 25) Adjust metal heater pipe. Reinstall rubber heater hose. 26) Reinstall W/P pulley and Fan clutch, and upper idler if it was removed. 27) Thread NEW Belt on pulleys. 28) Tighten tension on idler. Tighten idler axle bolt. 29) Install lower rad hose. 30) Slide shroud over pulleys. 31) Install fan on clutch. 32) Clip shroud retainer bolt mounts back on top of radiator. 33) Install shroud. 34) Connect upper hose. 35) Reinstall radiator retainer. 36) Bolt retainer to Tubular bumper mounts. 37) Reinstall grill. 38) Wonder where the extra bolts etc are supposed to go. 39) Cuss - pray -cuss - pray. 40 ) sip some beer. 41) carefully inspect everything to ensure its back to the way it looked before (several pictures from a digital camera taken during the disassembly will help). 42) Close the rad petok. 43) Add 1 gallons of antifreeze. 44) Start engine and add another gallon of A/F. 45) Turn heater controls to HOT inside (no need for fan). 46) Water guage should show 180 to 210F. 47) Add 1 gallon of water. 48) Install New 18PSI rad cap. 49) Turn off engine and add water or A/F to overflow tank. 50) 1 hour later open Cap to see if level has settled. Add Water as needed to fill rad.

Posted on Dec 31, 2008

JMMARRERO59
  • 77 Answers

SOURCE: 2001 jeep grand cherokee heater problem

BLEND DOOR FOR RIGHT SIDE BROKE INTO THE A/C SIDE. TO REPAIR PROBLEM WILL NEED TO REMOVE DASH AND HEATER/EVAP CORE BOX.

Posted on Jan 08, 2009

michigan man
  • 3533 Answers

SOURCE: blower motor only works on high on 98 jeep grand

you need a temp limited switch and for the most part its close to the blower motor has a small screw on each side with a plug in the middle give these websites a try www.autozone.com and www.alldatadiy.com if all fails stop by your Jeep dealership in the parts department and they be able to show you what i am talking about and print you off pictures and diagrams showing you where it is located wish you the best of luck Michigan Man.

Posted on Jan 04, 2010

  • 6982 Answers

SOURCE: Where is the camshaft sensor located on my 99 Jeep Grand Cherokee

If you still have a cap rotor and ignition wires, it's inside the distributor. If not, it is the part where the distributor used to be (center rear of the engine behind the intake manifold)

Posted on Feb 19, 2010

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Show me a 99 show me 99 Jeep Grand Cherokee pictures


yes, goggle is your friend (click that then click images on top)
amazing, no?

https://www.google.com/webhp?gws_rd=ssl#q=1999+grand+cherokee


the book is free, too LOOK at, , no pay ! ;like spam above.
the FSM, factory service manual , click body.
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click body, 191 pages, no less.

http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service


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My 99 Jeep Grand Cherokee's heater core is leaking


Here's a link on how to replace your heater core.There are two engines listed for this year,here is the link to the 4.0 engine,Here's a link to the 4.7 engine.

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I have a 99 jeep grand cherokee with water flowing from a what looks like a drain from the heater core area. the floor isnt wet and the heater works could the heat core have a crack


Is water coming out or is it antifreeze? If its antifreeze you have a heater core leaking. If its water than it's normal. The air conditioner is also a dehumidifier, and that is where the condensation comes out.

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check the level of water in the rad, had same issue with 04 voyager topping water solved the issue.

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Door clunking on my 99 jeep grand cherokee


GO TO ANY AUTO STORE AND GET NEW DOOR PINS TRY THIS
NEED MORE CONTACT ME

ALIENPHONE

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