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what about testing the thermostat in boiling water first. get a thermometer, and put that in the boiling water and make sure it opens at the right temp (i think its about 86 degrees c) Rob
when the head gasket went did you have the head pressure tested and skimmed ?300tdis suffer from cracked heads which in turn couldlead to water losscracked blocks can lead to water loss aswel between no 2 and 3 cyl but wouldnt cause overheatingare you sure it is overheating not a dodgey sender or wire leading to it ?strange that if the engine is nocked off then kicked back in to mins later its back to norm op......that just isnt rightalso you say you go around a right hand bend and it drops.... going around a corner isnt going to make any difference to engine op tem some how :? try some other means of keeping tabs on engine tempive got a digital temp gun to keep tabs on anythings temp and for when i dont believe my temp guage :lol: just seems strange to me :? but coolant loss, it could be head gasket again, or a cracked head :shock: dan
the water has to go somewhere, so iff its loss ? is there any excess pressure in the header tank ?. the p gasket as mentioned ?. internal heater matrix (wet carpets)?. iff you had a head prob did the head get checked for distortion, may even have a crack ?. cant think of anything else. dont think its anythng to do with lack of t/stat but it does sound like air in the system. alan......
i know this is a daft question but when you fill it are you filling it through the plug in the top of the t/stat housing as well ?. alan.....
The was a guy in the disco owners club who had an overheating problem. Turned out to be a rogue bit of 'stuff' floating around by the water pump. He took it out, flushed the cooling system straight through, new water pump, put it back together and its been fine ever since.I asked about the P gasket as mine kept overheating. It turned out to be a dodgy water pump as the pulley was well wobbly and also the P gasket was non existant. Both replaced and now no more over heating. I've been to Brecon twice and Hereford and it was been fine so she's good for short and long journeys It does sound like too much pressure. Have you started from cold with the coolent expansion tank cap off, let it warm up and then revved the engine. If the head is cracked between the water jacket and cylinder then you should see bubbles, like you see on the WW2 films with a submarine underwater :lol: :lol:
just thinking that but i'd take the multi belt off so the pump aint working and brim the header tank .then any bubbles will most definatly be air , cant run for long like this though. failing that ,long winded this. make some sort of plug to fit in where the glow plugs fit one at a time set that cylinder to tdc lonck the engine in gear brake on or something then pressure the cylinder with air again with the expantion tank brimmed, you would have to reduce airline pressure though . do each cylinder see iff you get any bubble that way . you woud even know which cyl has the leak iff any ?. alan.....
Had it running yesterday with cap off... some water comes out, as it should do, then it levels off and movement is there so water pump is doing it's job... but no bubbles or excessive pressure from header...
not a clue with that one just had a look at mine see what you mean. try one .they dont look to sustantial but to blow one of them your back to excess pressure, which your cap would have released. even iff the head gasket had gone id have thought the cap would blow before that. easy and chepest way is going to be to get a new cap an valve . just keep an eye on the pressure then. alan......
tis a strange one , must be a lot of pressure to keep blowing these hoses ?. alan......
Just waiting for the post mortem now :( Any comeback on whomever did the change?
