sierrafery
Well-Known Member
That's definitey not right, what happens if you remove the cap ?
robhtid
Well-Known Member
With the cap removed It still flows up and over! The egr cooler is removed and the two pipes have been connected together. If this has any effect but this was done 3 years ago. I have just replaced the tank and coolant so maybe now it's just visible as the old tank was filthy
sierrafery
Well-Known Member
Yes that pipe was through the EGR cooler initially and now being connected together goes directly to the oil cooler, it's normal to be a SLIGHT return flow on that pipe but i've never seen such thing as the level in the tank to not be even in the two chambers of the tank due to high pressure there... on some modells that circuit is completely missing as that port of the oil cooler is blanked, that's why they sell these https://twinwoods4x4.co.uk/product/td5-oil-cooler-blanking-plug/ and the tank has no hole there... maybe you should do that but the coolant circuit in the oil cooler might be clogged one side so the pressure goes mainly in that port which is not OK
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sierrafery
Well-Known Member
Welcome. I presume that you realised that you'll have to blank the tank too on that port then you can remove the whole pipe from there
Easiest to replace the tank with an EU2 one https://twinwoods4x4.co.uk/product/expansion-tank-d2-less-eu3/
robhtid
Well-Known Member
Hello again. Sorry I've been working away and haven't had chance to look at this much further but I've just got back and had 15mins looking and checking some diagrams.
So am I right in saying that the oil cooler gets it feed from an internal waterway in the engine and also has a separate return back into the engine and the take off that is sometimes blanked was just to circulate the egr cooler? With blanking this off the oil cooler still has a circulation and isn't just a dead end?
My other thought and after looking at various diagrams is the egr cooler flow direction that leaves the oil cooler and goes through the egr then goes in to the bottom left of the rad second spigot up. I could connect the pipe into this instead of blanking and completing a circuit and aiding flow?
Thanks
sierrafery
Well-Known Member
YES, the oil cooler works perfecly blanked there... to simplify, that port which can be blanked is useless once the EGR was bypassed...period
jamesDiscoTD5
Active Member
On an EU3 TD5 (and basically any EU2 TD5 that's had the radiator replaced) that connection on the radiator is blanked internally, so it's not going to do anything. As Fery said, just blank it at the oil cooler and the expansion tank (or fit an EU2 tank).
