26 11 030 Balancing Propeller Shaft: Requirements:

WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.

Propeller shaft in perfect optical condition.

Balance propeller shaft if balance plates are missing or propeller shaft is suspected to have imbalance (refer to instructions supplied with balancing equipment).

CAUTION: A jacked-up vehicle must only be test operated when suspension of driven wheels is supported (deflection angle of output shafts). Maximum speed specified for a jacked-up vehicle or vehicle on a dynamometer must never be exceeded. Conform with safety regulations.

Centre propeller shaft:

Loosen exhaust assembly, rubber engine mounts and transmission cross member.

Position Special Tool 26 1 020 at rear engine-carrier bore and at center of transmission.

NOTE: Transmission is offset by 10 mm to right when viewed in forwards direction of travel. As a result of this, center point must be taken 10 mm to left of center of transmission.

Fig 1: Centering Propeller Shaft

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Determine measuring point on transmission.

Transmission S 5 D 200/250 G:

Measure 10 mm to left from cast rib (1) on transmission housing.

Mark measuring point (2) and apply Special Tool 26 1 020.

Fig 2: Identifying Measuring Point

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Transmission S 5 D 310 Z:

NOTE: Cast rib (1) on transmission housing is offset 7 mm from center.

Measure 3 mm to left of cast rib (1) on transmission housing.

Mark measuring point (2) and apply Special Tool 26 1 020.

Fig 3: Identifying Measuring Point

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Move transmission sidewards until special-tool gauge has equal distances on left and right sides.

Checking/adjusting propeller shaft-deflection angle: remove exhaust assembly, refer to 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM (Z3 / S54) .

Unscrew heat-protection plate at center and right front.

Set needle perpendicular with help of bubble level.

Fig 4: Setting Needle

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Read degrees.

NOTE: Always fit measuring gauge with scale pointing in same direction (e.g. scale on right).

One graduation = 5'.

Position of vehicle is not important as only individual angle is compared.

Hold gauge 26 1 030 against front section of propeller shaft and measure angle.

Fig 5: Holding Gauge Against Front Section Of Propeller Shaft

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Determine deflection angle of joint disk and, if necessary, correct on transmission suspension or center mount by installing shims (up to max. 3 mm).

This requires supporting transmission and unscrewing crossmember from body.

Example:

Measuring Deflection Angle

Engine angle	2° 16'
Propeller-shaft angle	2° 06'
Joint-disk deflection angle	0° 10'

NOTE: When correcting a deflection angle by installing shims, remember that deflection angles of adjacent joints will also change.
In general, deflection angles of joints should be as small as possible.

Place Special Tool 26 1 030 on machined surface of final drive at bottom.

Determine deflection angle.

Fig 6: Determining Deflection Angle Of Final Drive

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Apply Special Tool 26 1 030 on rear section of propeller shaft and measure angle.

Determine deflection angle of center mount and, if necessary, correct on transmission suspension or center mount by installing shims (up to max. 3 mm).

Fig 7: Determining Deflection Angle Of Centre Mount

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