Quote:
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Originally Posted by BMRLVR
Quote:
Originally Posted by Yellow Snow
Seems strange when back in the days when S54s running 5w30 were spitting rod bearings out, BMW almost cured the problem with new shells and the freshly developed 10w60tws.
Surely going back to 5w30 is a retrograde step.
We have no such 5w30 recommendation in Europe except for using it to top up with in emergency.
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They solved the problem with additional clearance, not the 10W60. The TWS has been around for years albeit under different names. I have spoken to Doug Hillary, one of the original engineers/tribiologists who worked on the development of TWS, you can find him on www.bobistheoilguy.com if you are interested. |
But is there any cast iron 100% proof that the replacement s54 bearings run more clearance than the originals? Or is it an urban myth?
The Z3M S54 didn't have the bearing recall, it just changed from 5w30 to 10w60tws with much success.