Junior Member, warming up (<31 posts)
Join Date: May 2017
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Well, I have to say this actually got a lot more interesting than I originally thought it would. I would just like to address some of the common themes here guys. I asked for some honest input, and I got some.
Yeah, it's not gonna be cheap and I never said it was going to be. I said that in the long run, it could be cheaper than an S85. If your vanos pump decides to have a bad hair day and turn in to a frag grenade, you could easily wreck your crank by the time you discovered it. Yeah, you could have it turned and get undersized bearings, or get a new crank. You're talking 3k here, 5k there, before you know it you're carrying the one....and you get the point. Maybe you get lucky and it's just the pump. That's still 3300 for the pump, couple hundred in fluids and other expendables, and if you aren't able to do it yourself the labor.
Someone mentioned the availability of "crate" motors for 8k, and lets clear this up; a "tested" engine for sale on ebay from a salvaged car is not a crate motor, its a gamble lol. Could be good, could be well, you know, an s85 being a diva. You just never know what's inside.
As far as an LS swap, hell yeah, it would be cool and even better to make some of you all with hurt feelings get really upset. That's actually my bread and butter and if I wasn't opposed to gutting and cutting on my car, I'd do it in a heartbeat. An LS swapped BMW is on my list of things I want to build, but not this one, it's just in too good of shape to go that route.
Circling back to the reason for an S65 instead of something else, there are a couple of reasons. Electronics compatibility is a big one. As Jim mentioned the pre LCI cars run EWS3 and the S65 runs EWS4. That's something that I think you could get past, and save the integrity of the OEM instrumentation. The S65 is not "basically an S85 sans 2 cylinders", it has a low pressure VANOS system which is far less problematic. Yeah, the rod and main bearings have issues, but so does the S85. I don't think expecting 50-60k miles on a set of bearings is unreasonable. But it does share a bolt pattern with the transmission and the motor mounts look similar. I would just but a used subframe to modify for the difference in length. Tuning wouldn't be an issue until it was modified, I would be integrating the S65 harness and DME into the E60 chassis. Not plug and play, but nowhere near as bad as trying to integrate something like an LS pcm.
Yeah, it wouldn't be cheap but it wouldn't be a far reach from buying a used S85 and doing rod bearings and whatever else it might need. If there was ever a time I decided to play Russian roulette with an S85 it should be possible. At any rate, I asked for some honest input and got it lol. I'm not ruling it out, but I'm also not ruling it out. Part of me wants to do it just to hurt some feelings.
PS- Don't get too sensitive here guys. Cars are supposed to be fun.
Last edited by schadjason; 26th March 2019 at 08:39 AM.