ln130 new head but spurious temp readouts

[fester]

just picked up my jeep after being in the garage since november for cracked head, now it seems not to overheat but read no temperature at all untill about 6 miles of driving then goes to just below half then a quarter then back to nothing at all and then the process is repeated again.
its just had a brand new head rad etc and i am not sure what to do nor if the garage know what to do ,does this sound like an airlock or something else

also i could someone tell me what kind of readout the oil pressure gauge should read upon start up and after the engine is at temperature

[laser_jock@work]

Has it had a new thermostat fitted?

Oil gauge should normally be about 1/3 up the scale at 2000 rpm (can vary with new or thin oil etc).

Nevillef

[Koi]

Has it had a new thermostat fitted?

Oil gauge should normally be about 1/3 up the scale at 2000 rpm (can vary with new or thin oil etc).

Nevillef

Yep check stat and also coolant levels, are both heaters working OK, could be an air lock somewhere

[Linda]

Here you go -

http://www.4x4toys.co.uk/oil.html

[fester]

oil pressure ok then,yes both heaters work and no bubbling sound either,just looked at the filler cap on the stat and the rubber seal is knackered so ill order one to be on the safe side and may as well order a stat while im at it im not taking the surf back to the garage after i got a 2300 quid bare head job done

ill finish the job myself

[InfraRed]

Sounds more like an electrical problem to me, I would check the connection to the temperature sensor. the sensor itself may be faulty or if you are also getting erratic oil pressure readings, it could be a faulty instrumentation regualator.

[fester]

temp connections ok