Hello-

I am replacing the original RMS on my non-turbo 850 at 160,000 miles. At the same time I am addressing any positive crankcase pressure that may be contributory. The independent shop who is doing the work insists that the flame trap must be in pace (they even said by law). Now I know this is a stretch. I read somewhere that there may have been a service bulletin on this, but my understanding is that on the 850s flame traps are not necessary to prevent engine fires and that they do more harm than good. Bay13 says that 1998s (presumably s70s) left the factories w/o flame traps. Does anyone here have a sense of official word on this for 850s? Being California, most shops I've talked to are pretty dogmatic about keeping with original EMS specs. Since I am sinking the big bucks into the RMS repair I don't want a headache 20K down the road.

Thanks,
Paul