Thread: S54 Swap
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Old 11-05-2012, 12:44 PM
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HakenTT HakenTT is offline
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Location: Arizona
 
Join Date: Aug 2011
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Mein Auto: '91 E30
Quote:
Originally Posted by JayMac View Post
I agree, but you also don't have any idea of how this was maintained prior to me. You can find plenty of pictures where the engines look spotless. You get more hp at the expense of heat so you have to find a way to get ride of it. There is a reason the the S54 is one of the few set ups that comes from the factory with an oil cooler. Another issue with oil is low mile trips suck. You get condensation in the block and if you don't get the oil up to temp for a suitable amount of time you don't distill off the water and that forms the acid that helps get you sludge. I was pleased not to find scoring on the cams, which is more of an indicator than the dark crap. If you go back and look at my shots of the oil pan. That was all caked on. It took two hours of scotch pad, WD40, brake cleaner and simple green to get that off. Oil choice is important too. BMW changed the weight spec of the oil after the bearing incident. It went from 5 w 30 to 10w 60. This opens up plenty of debate on oil and the like.
One other thing on the oil. If that was 10w60 in there it is some thick goo. Any oil left sitting on hot engine parts will do this. What is amazing is the amount of oil on the upper end weeks, or even months after this thing was run.
How many miles were on the s54 engine? From what year is it? What kid of quote did you get for mss54 reflash for swap?

BMW probably went with much thicker oil because people were reving the crap out of the engine when cold. This is why the W60 but when the oil warms up it is still 10w.

these engines rev to 8000 rpm and make 333hp, that is tremendous kinetic energy stressed on the metals. This is true motorsports engine
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