Big Water Leak

[93mudspitter]

I'm having a similar issue. mine is leaking coolant which is running down over the bellhousing. I have no clue where the leak is coming from as it is not severe. But while I'm driving I can hear a hissing sound about every 5 minutes coming from under the dash on the passenger side. Also my heat will blow hot while im drving but if i stop for a few minutes i start to lose heat. Any ideas?

 

[winterbeater]

I'm having a similar issue. mine is leaking coolant which is running down over the bellhousing. I have no clue where the leak is coming from as it is not severe. But while I'm driving I can hear a hissing sound about every 5 minutes coming from under the dash on the passenger side. Also my heat will blow hot while im drving but if i stop for a few minutes i start to lose heat. Any ideas?

If you start getting steam on your windshield, you've got a leaking heater core.

 

[winterbeater]

I think one of these blighters could be the culprit?

I didn't think any XJ's had coolant sensors in the block. Only knew about head and tstat housing.

 

[mrogers]

I didn't think any XJ's had coolant sensors in the block. Only knew about head and tstat housing.

i think the diagram is of the pre-HO renix engine. I not sure about the sensor but mine seems to be around where the pic shows a drain plug. Could be wrong just found this pic whilst trowling the net

 

[winterbeater]

It's probably the freeze/core plug above it.

 

[93mudspitter]

If you start getting steam on your windshield, you've got a leaking heater core.

2 months and no steam. this is really annoying me i just want to fix it but i spent 4 hours under it and couldnt find the damn leak...

 

[mrogers]

Found the leak and its not pretty. Its the water pump, its leaking then running down between the sump and block then dripping onto the exhaust. Quite a bad leak, so I have to add a new water pump to my ever growing and expensive list.

 

[wim hoppenbrouwers]

Hallo. Be glad you find it and can do now an easy repair.:spin1:

'92 XJ

 

[joe_peters]

Found the leak and its not pretty. Its the water pump, its leaking then running down between the sump and block then dripping onto the exhaust. Quite a bad leak, so I have to add a new water pump to my ever growing and expensive list.

That is easier than the block plugs. You got lucky.

 

[mrogers]

Changed the water pump the weekend. It wasnt too bad a job, even for a low skill DIY mechanic like myself. The weirdest thing was every write up I looked at described slightly different engines all listed as the 4.0 Cherokee. Mine has an auto adjuster and removing the serpentine belt was liturally a 2 min job. getting the pump of was a little trickier as I had to pull off the PAS res/pully then remove the pully underneath and its brackets to get sufficient access to the pump. Fitted the new one with a OE gasket and some black gasket stuff. Hopefully it will all hold up

 

[winterbeater]

Wow, yours had a spring loaded adjuster! I take it you have the Right Hand Drive model? I guess they got special treatment. My 1993 Ford pick-up truck had the self adjuster, but my 2000 Jeep, no way. Ridiculous. You did get lucky. The freeze plugs are a bitch. And congratulations if it doesn't leak.

 

[bigalpha]

Wow, yours had a spring loaded adjuster! I take it you have the Right Hand Drive model? I guess they got special treatment. My 1993 Ford pick-up truck had the self adjuster, but my 2000 Jeep, no way. Ridiculous. You did get lucky. The freeze plugs are a bitch. And congratulations if it doesn't leak.

Is it common for a new WP to leak when installed?

 

[mrogers]

Wow, yours had a spring loaded adjuster! I take it you have the Right Hand Drive model? I guess they got special treatment. My 1993 Ford pick-up truck had the self adjuster, but my 2000 Jeep, no way. Ridiculous. You did get lucky. The freeze plugs are a bitch. And congratulations if it doesn't leak.

Yep it is above the alternator, its a pully that is spring loaded. If you put a socket and bar on and pull to the right is slackens, let go and it springs into place.

 

[winterbeater]

Is it common for a new WP to leak when installed?

No. But not unknown.