Overheating Problem - Ongoing

Been having a problem with overheating for about a year now and still not got to bottom of it.

Drive along fine suddenly aircon cuts out and temp guage climbs into the red zone. stop car, water boiling, overflow overpressurises, water everywhere. Cool down, refill with coolant, drives ok for ten minutes hen the same again.

Changed the eng temp sensor, worked ok for three days then back to same - has now been back to garage where they drained and flushed radiator, all hoses have been replaced, temp sensor changed again, overflow tank and filler cap replaced. block skimmed ok, water pump replaced and finally the viscous fan replaced. This was all done over the period of the last year. After the viscous fan was changed car was working fine for past 3 weeks now the overheating has started up again, exactly as it did before.

Any Ideas?? My bank manager is not a happy chappy let alone my wife...

Thermostat?

are you getting all the air out when you are refilling it?

check radiator for cold spots.
is the water oump working?

harvey_s said:

Been having a problem with overheating for about a year now and still not got to bottom of it.

Drive along fine suddenly aircon cuts out and temp guage climbs into the red zone. stop car, water boiling, overflow overpressurises, water everywhere. Cool down, refill with coolant, drives ok for ten minutes hen the same again.

Changed the eng temp sensor, worked ok for three days then back to same - has now been back to garage where they drained and flushed radiator, all hoses have been replaced, temp sensor changed again, overflow tank and filler cap replaced. block skimmed ok,WATER PUMP REPLACED and finally the viscous fan replaced. This was all done over the period of the last year. After the viscous fan was changed car was working fine for past 3 weeks now the overheating has started up again, exactly as it did before.

Any Ideas?? My bank manager is not a happy chappy let alone my wife...

Click to expand...

can yer see it now daft?

Already changed the thermostat twice.

Servicing was crried out by garage !!! so have assumed deaerated correctly. maybe should not assume !!

my ole da sed on es deff bed " never assume an assumption"

harvey_s, what vehicle are you talking about? What make, kind, year (or at least plate reg), engine, transmission, mileage?

What do you mean by "block skimmed ok"? All these parts you were mentioning were replaced in the attempt of curing the overheating problem or was it something else?

Will get check for air in system again..

slob said:

can yer see it now daft?

Click to expand...

ere Slob - to quote sumone much wiser than I -

slob said:

my ole da sed on es deff bed " never assume an assumption"

Click to expand...

just coz the water pump has been replaced - dont mean its working ok - and just coz the radiators been flushed - dont mean it is clear......................



DUZ IT?

cipx2

Discovery 95 model 5 door, automatic transmission, 3.9 litre V8 engine, Chassis no SALLJGM4MVA713272 mileage 150000kms.

All parts replaced to try and cure fault. Block skimmed meant Engine top overhaul and cylinder head tested in machine shop.

Full list of replacements and work as follows:

initially started as intermittent overheat with Aircon cutting out, thermostat replaced, ok for a while then started acting up again.

Went to garage for overheat problem and service.

10000Kms service c/o
Engine Top Overhaul
Cylinder head testing machine shop
Replaced water pump and thermostat
replaced all hoses and gaskets
replaced coolant tank cap

All ok for short time, then problem started again.

back to garage - changed coolant cap again, again ok for short time then acting up again.

back to different garage now - flushed and drained the radiator and replaced the viscous fan.

All ok since July now, but has once again started to overheat.

The Mad Hat Man said:

ere Slob - to quote sumone much wiser than I -

just coz the water pump has been replaced - dont mean its working ok - and just coz the radiators been flushed - dont mean it is clear......................



DUZ IT?

Click to expand...

DUZ WIFF A WATER PUMP. AV U EVVA HEARD OF A NOO WATER PUMP NOT WORKIN?

yes.....

1) the housing not been cleared of rust and debris and the new pump not turning - or
2) the fan belt stretching after a week or so and not drivin the pump

ive had a new pump fail cos the impellor was not fitted correctly by the ****s at QH

am under duress here ave got godzilla staring at me

fookin hell Slob, its wearin a DRESS!?

The Mad Hat Man said:

fookin hell Slob, its wearin a DRESS!?

Click to expand...

how else do you thinkit managed to sneek up on me?

slob said:

am under duress here

Click to expand...

so wot the fook are yu doin under the dress, it can still see yo

The Mad Hat Man said:

so wot the fook are yu doin under the dress, it can still see yo

Click to expand...

i know what am doing.. am hiding from it.. what you doing .. did yer know its more deadly than burning series bushes?