I am an ex mechanic and posses a sound knowledge of most engines, however my knowledge of bmw is limited.
I have a bmw 5 series 520i 1997 e39, Not long after buying it the big ends began knocking and I had a 525i engine put in.
Just recently the vanos unit began knocking.
On top of that the fan clutch failed a while ago causing the engine to overheat.
I changed the fan assembly and thought I had solved the problem, since then I am losing water, not externally and need to top up every week or so to prevent overheating.
I have a milky white residue on the oil filler cap and white smoke billowing out in the mornings(all the symtoms of a blown head gasket)
My questions are as follows:
1: Does anyone know if an adjustment will solve the vanos problem?
2: Does anyone know if the symtoms I have described are common for anything other than a blown headgasket?
3: I have the bmw TIS cd rom but how complex is the head and vanos units removal/relacing procedure and can it be done with out the bmw specialised tools?