Audi A4 2.0 TDI - Green sludge on cooolant cap
Discussion
Hi All
i think i have a couple of scenarios for this issue but will post up here anyway just in case anyone else has got any suggestions.
2007 A4 Avant 2.0 TDI 140bhp, 110,000miles. A month or two back noticed it had lost some coolant. Topped up and the level remained fine. What i did notice was the coolant begnning to go a dark orange colour and some green sludge forming on the cap.
Had the tank cleaned out and the system flushed and refilled a week or so ago and checked it today and its starting to go again. No mayo on oil cap and oil looks black. No oil consumption above norm and no coolant loss or white smoke from exhaust - so don't think this is a head gasket on its way out.. i could be wrong though!!
Anyone got any ideas on what this could be or what to check? More importantly is this something that's going to cost an arm and a leg? Am i better trying to move it on and invest that money into a new wagon?
Cheers
Steve
i think i have a couple of scenarios for this issue but will post up here anyway just in case anyone else has got any suggestions.
2007 A4 Avant 2.0 TDI 140bhp, 110,000miles. A month or two back noticed it had lost some coolant. Topped up and the level remained fine. What i did notice was the coolant begnning to go a dark orange colour and some green sludge forming on the cap.
Had the tank cleaned out and the system flushed and refilled a week or so ago and checked it today and its starting to go again. No mayo on oil cap and oil looks black. No oil consumption above norm and no coolant loss or white smoke from exhaust - so don't think this is a head gasket on its way out.. i could be wrong though!!
Anyone got any ideas on what this could be or what to check? More importantly is this something that's going to cost an arm and a leg? Am i better trying to move it on and invest that money into a new wagon?
Cheers
Steve
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