Vehicle & Technical > Discovery
Overheating 300tdi
discograham:
--- Quote from: "bilge rat" ---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.....
--- End quote ---
Yep, filling from all three points to avoid air lock...
cardiff_gareth:
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 :wink:
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:
discograham:
--- Quote from: "cardiff_gareth" ---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 :wink:
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:
--- End quote ---
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...
bilge rat:
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.....
bilge rat:
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...[/quote]
you say no pressure but it blew a pipe off, is your expantion bottle cap o.k ment to release pressure at a certain point ?. cheap to try . alan......
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