Quote:
Originally Posted by grannyknot
Just through casual reading of forums over the years there does seem to be huge differences sometimes in the mileage owners get from S54 rod bearings.
I guess "I take care of my engine" is completely subjective.
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There is indeed a wide spread on wear and if or not it goes all the way down to the copper layer, however, I've only seen 1 or 2 cases of the hundreds where no wear was showing at 80k km and the in place bearings could be considered still acceptable.
Compare that to say an m54, where pretty much no wear is showing all the time at double the mileage, also on supercharged versions.
So rodbearing wear is a pretty certainty in owning an S54 and can be considered as a calculated cost. Loads of specialists here that specialize on this.
A typical rodbearing swap incl parts/oil/filter costs here (germany) about €1400 (incl 21% VAT salestax), so thats 2.8eurocents per mile (or 3 yankiecents/mile). I think that's a normal additional running cost for a high rev engine, and not something to cheap out on (penny wise pound foolish)
Still it's also not really known how the wear in the s54 is forming. To me it looks like cavitation wear.
However that doesn't necessarily have to do with rpm. The oil pump pressure regulator piston in the s54 also wears.
But indeed the "I take care of my engine" is very relative. Most s54 owners even don't put serious miles on their engines and inherit the miles of a previous owner. How many s54 owners here have actually put down say 100k miles themselves on their s54?