From digest.v7.n309 Sat Sep 20 21:48:41 1997
From: Land Shark <lndshrk_at_xmission.com>
Date: Sat, 20 Sep 1997 20:17:48 -0600
Subject: RE: [VANOS] Gosh I'm confused

> 1992 was first (model) year the M50 engine, rated at 189 hp, was used.
>It was also the only year when the engine did not have VANOS. From 1993
>onwards, all M50 engines became M50TU which included VANOS, increasing
>the hp to 190.

Not Exactly..

That would be for the THREE series (ala 325i)

For your FIVE series...

91 got the M50 motor.. and the VaNoS (note the way I wrote it!) M50tu motor in 1992... the 5'er got the updated technology about a year ahead of the 3'er

Easiest way to tell...

Look at the front of the motor, at top of valve cover.. if it is VERY flat across the front, M50.. if it has a BUMP on the driver's side.. M50tu..

Jim

PS: VaNoS is Variable Nockwellen Steureung or somesuch

PPS: M50tu.. tu is Technishe uberarbeit (technically updated)

more german autogobbeldy gook to go with ..

Sicher, Einzelfuer, und Feuerstoss (oops.. that's something else!)