Quick one my 1.7 Dti is leaking coolant. I've changed the oil cooler and the problem got better and performance improved. It's not the head gasket as there is no smoke, no performance loss and the oil level is solid always.
There's also still some oil contamination in the coolant although not much at all after the cooler change.
I've tracked the leak down to a gasket where a pipe from the turbo area meets the engine block. I've photographed it. You can't see the deposits on the picture as they are underneath the part shown but they are very heavy and white in colour so I know it's coolant.
Problem is I don't know what part to ask for when replacing it, nor do I know if it's a big job to replace or even indicative of a bigger problem somewhere else. I need:
1)To know what the arrowed part is doing and why it's leaking coolant.
2)To know if it's also carrying oil which would explain the contamination.
3)If it has any relation to the turbo as that's where it seems to go after coming out of the block.
4)How big a job both time and expense wise I'm looking at to replace it.
I've done the belt on this engine before at home so I'm not a noob DIY mechanic.
I could really use the help it's driving me mad