Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: jembo on April 21, 2011, 10:10:36 PM

Title: The saga continues..... Coolant system.... 4.0l P reg
Post by: jembo on April 21, 2011, 10:10:36 PM

Quick history following on from last post:
Had new rad, new water pump, new hoses, etc.....

Another (top) hose split so into a "new recommended garage". The new garage also replaced the pressure cap with a new one, as they said the old one was crap. They also removed an air lock, (burped the system).

The problem I am still having is the temp gauge goes up steadily to near enough 100 and then drops suddenly to about 60 then climbs back up again slowly. This happens all the time whist driving.

The mechanic is muttering about the head gasket.........

Anyone have any ideas - there is now no coolant loss or any leaks.

Title: Re: The saga continues..... Coolant system.... 4.0l P reg
Post by: MOCAJ on April 21, 2011, 10:14:55 PM

viscous fan ?

Title: Re: The saga continues..... Coolant system.... 4.0l P reg
Post by: daggie on April 22, 2011, 07:27:55 AM

our black jeep does it, ever since I change the water pump,
and has been abused since,
head gaskets rarely go :icon_super:
don't worry about it :003:

Title: Re: The saga continues..... Coolant system.... 4.0l P reg
Post by: wildrover on April 22, 2011, 11:20:52 AM

Could it just be your tempreture guage is up the duff.....?

My oil pressure guage does the same thing , nothing wrong with the oil pressure , just the sensor unit gone faulty....

Title: Re: The saga continues..... Coolant system.... 4.0l P reg
Post by: scrw on April 22, 2011, 02:15:38 PM

interesting, picking an xj up this weekend with the same problems, was going to take the head off & get it skimmed anyway