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Unread 04-28-2009, 09:14 AM   #1
emahan01
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jeep over heating at speed

my jeep is over heating fooka me i have two electric radiator fans thats i can feel the air pulling through the radiator the radiator it self is like 5 months old i flushed the coolant and the engine block new thermostat new water pump and it still over heats even on the highway with tons air flow

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Unread 04-28-2009, 09:21 AM   #2
Zew
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Is your belt routed the correct way? If the water pump is spinning the wrong direction, it won't pump the coolant through the block.
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Unread 04-28-2009, 09:48 AM   #3
emahan01
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wheres the diagram for the belt?
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Unread 04-28-2009, 09:55 AM   #4
J_Ro
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I know mine has a diagram of how to run the belts on top of the radiator.
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Unread 04-28-2009, 11:41 AM   #5
emahan01
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i got a new radiator so no more diagram but the belts are on correct it is still over heating what else could be wrong its beautiful out and i cant drive me jeep
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Unread 04-28-2009, 11:45 AM   #6
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airlocked?
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Unread 04-28-2009, 12:27 PM   #7
emahan01
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airlocked? please elaborate
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Unread 04-28-2009, 01:06 PM   #8
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He means air bubbles in the system.
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My V8 swap thread: http://www.jeepforum.com/forum/showthread.php?t=618350
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Unread 04-28-2009, 01:17 PM   #9
emahan01
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and to get rid of those i do what? and this would realy cause this bad of over heating like bubbling in the tank with coolant?
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Unread 04-28-2009, 02:19 PM   #10
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Its kind of the idea about a hot water radiator heating system. If there is air in the lines supplying the radiators... then no hot water will flow because there is air taking the place of where the hot water should be. You have to find the highest point in the system and release the air from it.

I know Jeeps don't have them, but like a caliper bleeding screw, some car manufactures have them in the thermostat housing neck.

I really don't think you have this issue. You need to test for flow. I would get a bucket, and disconnect your upper hose from the radiator, have someone start your jeep and see that coolant is flowing from the top hose into the bucket. your radiator is new... so I can't see it being the problem. It has to be the water pump, or blockage in the block.

When your jeep overheats, does the gauge show that its hot, or does it physically start shooting coolant into the overflow container?
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1998 Wrangler Sport w/ 5.2L 318 Swap

1998 Grand Cherokee 5.9 Limited - Kolak Ignition upgrade, K&N CAI, DT Headers w 3" Kolak exhaust/Flowmaster 50/Magnaflow CAT, Front/Rear Baer Drilled/Slotted Rotors, Front/Rear EBC Greenstuff Pads, Alpine CD/MP3/iPod Control Deck, RF 6.5 Power Series Separates

My V8 swap thread: http://www.jeepforum.com/forum/showthread.php?t=618350
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Unread 04-28-2009, 02:24 PM   #11
95BadBoy
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Could your new thermostat be bad ? IE sticking ? Best guess would be that, was the water pump new or a reman ?
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Unread 04-28-2009, 02:33 PM   #12
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Sticking open, or sticking shut? I've heard in some vehicles that if you remove the thermostat entirely, that it causes the vehicle to overheat... I don't understand why. You would figure that if there is flow through that area... that it would run cooler.

I totally understand a thermostat being stuck shut causing an overheat. That's why I want him to test for coolant flow.
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1998 Wrangler Sport w/ 5.2L 318 Swap

1998 Grand Cherokee 5.9 Limited - Kolak Ignition upgrade, K&N CAI, DT Headers w 3" Kolak exhaust/Flowmaster 50/Magnaflow CAT, Front/Rear Baer Drilled/Slotted Rotors, Front/Rear EBC Greenstuff Pads, Alpine CD/MP3/iPod Control Deck, RF 6.5 Power Series Separates

My V8 swap thread: http://www.jeepforum.com/forum/showthread.php?t=618350
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Unread 04-28-2009, 03:27 PM   #13
emahan01
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ive washed out the block and all hoses and the radiator with a garden house and washed the fins im really stumped as to whats wrong if i open the cap should i see flow or be able to feel it flowing through the hoses?
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Unread 04-28-2009, 03:41 PM   #14
Zew
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Best bet is to pull the top hose off the radiator.
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1998 Wrangler Sport w/ 5.2L 318 Swap

1998 Grand Cherokee 5.9 Limited - Kolak Ignition upgrade, K&N CAI, DT Headers w 3" Kolak exhaust/Flowmaster 50/Magnaflow CAT, Front/Rear Baer Drilled/Slotted Rotors, Front/Rear EBC Greenstuff Pads, Alpine CD/MP3/iPod Control Deck, RF 6.5 Power Series Separates

My V8 swap thread: http://www.jeepforum.com/forum/showthread.php?t=618350
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Unread 04-28-2009, 03:43 PM   #15
emahan01
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ok and after the top hose is off? then ?
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