Article by: Sean Article applies to: all models with the V12 M70 engine. Problem: Smoking engine. At first I thought the massive oil consumption was also related to the worn valve stem seals, but later (after replacement of the seals) it proved I was wrong, at least in this case. […]

Article by:Sean Article applies to: all models with the M70 v12.   Problem: Could be various. Some canisters suffer from a leaking anti-drain valve (which requires replacing the whole canister or a very creative workaround) causing the low oil pressure warning during start. Requires immediate action, fix it. But most […]

Article by: Johan Article applies to: All models with the M70 v12 engine and 730i/740i (M60 engine only, and yes: in Europe a 730 V8 was available)   Problem: Broken oil filter mounts seems pretty obvious to me, but I am on a weekly basis spending family time under the […]

Article by: Sean Article applies to: all models with the M70 V12 engine. Problem: People who often visiting this site are probably aware of my ongoing problems with hesitating, surging, running rough, erratic idle, hunting idle and stalling when accelerating. Folks who have some years of experience with working on […]

Article by: John Taylor with edits, comments, and photos by Yutaka Nakagawa and Sean. Article applies to: all models with the M70 V12 engine. Comment by Sean750: John experienced some intermittently tapping lifter noise with his ’89 750iL. He wrote a story about it , took some photo’s and gave […]

Article by: Sean Article applies to: all models with the M70 V12 engine. Problem: The last couple of months my V12 developed a rough idle. These engines can run like sewing machines, but not in my case. More like a 2-stroke chainsaw…first I looked for the obvious problems. Vacuum hoses, […]