the jeep man 94

having problems heat! drained rad. put new anti freeze in took it for a lap in the back yard 1.6acras and o the way back it jumped to about 250 on the temp gauge


could it be the water pump ?

the jeep man 94

any help

96_xj

what mixture did you use??

the jeep man 94

50/50

96_xj

did you blurp for air?

the jeep man 94

what do you mean i drained it and put new stuff in

96_xj

if there is air in your system (even with an open cooling system) it will run hot.

the jeep man 94

o ya not sure dont think so but it will run fine for like 5-10 mins but if you punch it a few times it jumps up 250 and 260 is max! i just dont want to blow it up ! so is it the water pump ?

Dugualla

Let it idle with the radiator cap off, just trickle a little 50/50 mix in as the radiator needs it, when the thermostat opens you should see water flow and the level may drop, just add a little more of the mix. This is burping the radiator, if you leave the cap on then there is nowhere for the air to go. You should always burp it whenever you change fluid or open the cooling system. Once you are satisified that you have the air out replace the cap and insure the overflow jug is full to the hot line, after the engine cools you should notice that the level dropped in the overflow reseviour.

I doubt it is your water pump if you have had no previous symptoms, probably just air but make sure you monitor the temp throughout the process.

Could also be a flaky tempurature sending unit.

Remember, just trickle water in, never fill an empty radiator on a hot vehicle, running or not, if the water can't mix in the radiator the cold water can crack a block or head.

96_xj

are your fans kicking on is the next question?

a way to check the condition of your clutch fan is to while running have someone shut off the engine and it should take 2 turns max for the fan to stop. if it spins pretty freely then the clutch is gone on the fan.

also turn on your ac and see if the fan kicks on.

it may be the water pump, but just trying to save ya money so you only have to buy one part =] also a new temp sending unit may be the problem

the jeep man 94

ok il try that out but i know that its heating up bc the rad starts steaming up

always89

You need to bleed "burp" the system. Can be a pain. Here is what I did:

Pull the upper hose off of the radiator and pour 50/50 mixturre in until full (leave the lid off of the tank)

Put the hose back on

Pull the temp sending unit out (back of the engine right on the head)

Run engine until antifeeeze comes out.

Refill talk as necessary.

the jeep man 94

il do that after work

1991Jeep_Man

Did you replace the thermostat? Because if it's warming up THAT fast, that screams that the thermostat doesn't seem to be opening.

the jeep man 94

no i did not