Topic: Engine

MAF Troubleshooting M70 (V12)

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 […]

Lifter Replacement M70 (V12)

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 […]

Intake Manifold Gaskets M70 (V12)

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, […]

Fuel Filters Replacement M70 (V12)

Article by: Sean Article applies to: all models with the M70 V12 engine. Problem: In my ongoing quest to fight the problems with rough idling, stalling when accelerating and surging I decided to replace the fuel filters to see if makes any difference. I was still convinced it had something to […]

Engine Rebuild M70 (V12) + Cobra Project

Article by: Sean – Additional comments and pictures by Cor Verlinde Applies to: all e31, e32, and e38 models with the M70 V12 engine. Someone we (Johan and I) know through our website contacted us that he had started an interesting project. He was planning to build a Cobra replica. […]

Alternator Replacement M70 (V12)

Article by: Sean Article applies to: All BMW models with the M70 V12 engine. Problem: When replacing my water pump (all belts removed) I felt some shaft play on my alternator. Although the voltaqe regulator with brushes were recently replaced, I decided to replace the alternator when I could lay […]