Flat Tappet Camshaft?

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This topic has 2 replies, 3 voices, and was last updated January 23, 2009 at 7:51 pm by theo.

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- September 4, 2007 at 4:26 pm #57013
  Gilles Blais
  Local British car newsletters are warning their membership about the recent reduction of zinc dialykl dithiophosphate (ZDDP) in API approved oils. This is causing early failure in new camshafts; moly-disulfide assembly lube is not enough. Older, broken-in units do not have a problem from what I read.
  
  The problem is defined for "flat tappet camshafts". Does anyone know if this applies to standard 260 lifters which have "convex spherical shape" contacting the cam?
  
  Cheers, Gilles
- January 22, 2009 at 5:34 pm #62753
  Peter & Penny Stanisavljevich
  Yes, it does.
- January 23, 2009 at 7:51 pm #62757
  theo
  There are oils that have maintained the old additive content (I think Shell Rotella T is in this camp) or else you might be able to get it as an oil treatment additive.
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