washers under main bearing cap bolts

[Bill in MN]

I got the block back from getting align bored and there were no wave washers on the bearing cap bolts except on the center cap. I don't recall if they were on the other bolts when it went to the shop and they lost them or if there were none to start with. RealOem is pretty vague on this.

Anyone??

[1st 5er]

[Rich Euro M5]

The torque spec is 60 Nm or 44.25 lb-ft, bolts washed and oiled. Based on the low torque, wavewashers should probably be used under all of the main cap bolts.

[turbodan]

I don't remember any washers under the main cap bolts on any M20 I've ever had apart. Don't know if the M30 is different. I don't see any harm in using them though, either way.

[S38Mike]

I just checked current ETK using e28 528e U.S. and found no washers specified on main bearing cap bolts. E28 535i U.S. does use 10mm wave washers (p/n 07-11-9-932-112)

[Xenocide]

Pulled the pan on the eta m20 last night, definitely no washers on the main bearing cap bolts.

[Jeremy]

Bill's motor is an m30.

[Mike W.]

I could swear I've seen both.

When in doubt my answer is always locktite. I know I use it in places I shouldn't have to, but it's cheap insurance. The factory doesn't use it as much as I do because it's expensive for them, and they know where it's needed and where it isn't. Mostly. Except say BMW V8 oil pump bolts.