Honda Bmw 5 Service Manual
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31 0-5 Front ~uspensionl Front strut assembly, removing and installing - Raise car and remove front wheel. WARNING- Make sure that the car is firmly supported on jack stands de- signed for the purpose. Place jack stands underneath struc- tural chassis points. Do not place jack stands under suspension parts. - Unbolt bralte caliper assembly, lkeeping bralte hose connect- ed. Secure brake caliper to body with wire. Do not let it hang from brake hose. See 340 Brakes. Remove ABS pulse sensor mounting bolts (arrows) and re- move sensor from housing. Detach ABS sensor wire harness and bralte pad wear sensor wire harness (if equipped) from strut housing. Loosen and remove stabilizer bar link mounting nut while counterholding link ball joint. Disconnect stabilizer link from strut. NOTE- Use a thin wrench to counterhold shaft of stabilizer bar link ball joint. - Cars equipped with vertical headlight adjustment system: Disconnect control arm from level sensor. 4 Remove outer tie rod end nut. Use BMW special tool 31 2 240 or equivalent to press tie rod end out of steering arm.
31 0-6 Front Suspension Mark installation position of strut tube (arrow) in steering knuckle pinch collar. CAUTION-- Use paint, not a scribe tool, to mark location of strut tube. 1 4 Letter on strut tube designates mounting location. - R - Right side installation position L - Left side installation position NOTE- Marking the strut tube is not necessary if factory marks (L or R) are still visible. 4 Counterhold strut tube pinch bolt (arrow) nut. while loosening
Front ~us~ensionl Spread steering knuckle slot in tool 31 2 200. pinch collarwith BMW special 4 Worlting in engine compartment at strut tower: - If applicable, disconnect plug connector at top of strut for Electronic Damper Control and remove cap from cable. Remove upper strut bearing mounting fasteners (arrows). WARNING- Do not remove centerstrut retaining nut. 4 Use lever to push down on wheel hub. Tilt strut outward NOTE- Use masking tape to protect fender arch from possible dam- age.
31 0-8 Front Suspension Slide strut assembly out of steering lknucltle pinch collar. If necessary use pry bar. CA UTIOI\C Do notpullstrut out of steering knuckle with twisting motion. This can scratch and damage the strut. Disassemble and reassemble strut assembly as described later. When installing new strut, be sure to align locator letter (A) on strut body with slot in steering lknuckle pinch collar (6). Struts are marked with L for left and R for right. Remainder of installation is reverse of removal. Make sure strut shoulder (below locator letter) bottoms out in steering knuckle pinch collar. Use new self-locking nuts and bolts. When attaching stabilizer lrnk to strut, use a thin wrench to counterhold link ball joint while t~ghtening nut. - Have car professionally al~gned when job IS complete. Tightening torques Brake caliper to steering knuckle 110 Nm (81 ft-ib) Road wheel to hub 120 ti0 Nm (89 t7 ft-lb) Stabilizer bar link to strut 65 Nm (48 It-lb) Steering knucltle pinch bolt at strut 81 Nm (60 It-lb) - mountlng collar Steering tle rod to steerlng knuckle 65 Nm (48 it-lb) Strut assembly top to strut tower 24 Nm (18 it-lb) - - -
31 0-9 Front Suspension Front strut assembly components (6-cylinder models) 1. Cap 2. Upper strut self-locking nut 3. Washer 4. Strut bearing reinforcement 5. Strut mount self-locking nut 6. Upper strut mount 7. Dust protector collar 8. Spacer 9. Upper spring seat 10. Spacer 11. Upper spring pad 12. Coil spring 13. Rubber stop 14. Dust boot 15. Lower strut pad 16. Strut with lower spring seat Front strut assembly, disassembling and assembling Replacing the strut, upper strut mount or spring requires that the strut assembly first be removed from the car and disas- sembled. For a guide to parts used during component re- placement, see the accompanying diagram. NOTE- Illustration shows components ior 6-cylinder models (525i, 528i, 530;). V-8 models (540i) are similar but not identical.
31 0-1 0 Front Suspension 4 Clamp spring compressor (BMW special tool 31 3 340 or equivalent) in shop vise. WARNING- * Do not attempt to disassemble the strut assembly without a spring compressor designed specifically for this job. Prior to each use, checlc special tool for functionality. Do not use a damaged tool. Do not make any modifications to tool. Use correct size spring retainers when compressing coil spring. I When assembling BMW spring compressor (special tool 31 3 340), make sure spring retainerplates are felt and heard snapping into place. Check seating of spring retainers carefully. Position coil spring between spring holders so that 3 coils lie between spring holders (arrows). Compress spring. WARNING - When tensioned, the spring coils must rest completely in the spring holder recess. Never tighten or loosen spring compressor with an im- pact tool. Only tighten down the coil springs until stress on the thrust bearing is relieved. a Only loosen strut nut if spring coils are completely in- serted in the spring holder grooves. If necessarx loos- en compressor, reposition and recompress. Use BMW special tool 31 2 21 0 or equivalent to remove strut nut. Counterhold strut shaft using 6 mm Allen wrench. CAUTION- Do not remove strut nut with impact tool. Remove upper strut bearing and related components. If a new coil spring is being installed, relieve tension on spring compressor and remove coil spring. Check strut dust boot, rubber stop and spring pads. Replace as necessary. Replace strut, upper strut mount or spring, as needed
Front Suspension / Front strut top mount assembly < Replace springs in matched pairs only. BMW ID number is stamped near end (A). 4 Assembly is reverse of disassembly, noting the following: Use a new upper strut self-loclting nut (A). Tighten nut fully before releasing spring compressor. CAUTION- Do not tighten strut nut with impact tool. NOTE- illustration shows components for 6-cylinder models (5257, 528i, 5300. V-8 models (5400 are similar but not identical. 4 Be sure upper and lower spring pads (arrows) are correctly installed to spring seats before releasing spring compressor. Release spring compressor carefully and evenly, allowing spring to expand slowly. Have car professionally aligned when job is complete. Tightening torques Upper strut mount to strut shaft 64 Nm (47 ft-lb) Strut mount to strut tower (ME) 24 Nrn (18 fi-lb)
/~ront Susaension Front suspension arms FRONT SUSPENSION ARMS Scyllnder models (5251,5281,530i) Control arms and tension struts are attached to the front sub- Front suspension arms V-8 models (5401) frame through rubber bushings and to the steering ltnuckles by ball joints. NOTE- Tension struts are sometimes called thrust arms or thrust rods. Control arms or tension struts are sometimes called lower front arms or lower rear arms. Inspect ball joints for wear and looseness. lnspect bushings for wear or fluid lealts. The ball joint can only be replaced as part of an entire suspension arm assembly. Some suspen- sion arm bushinas are available as re~lacement Darts. Al- ways replace in pairs NOTE- Steering wheel vibration during braking (usually at road speeds of 50 to 60 m.p.h.) are often causedby faulty suspen- sion arm bushings, not out-of-true brake rotors. Some special tools may be required to remove suspension arms and to replace bushings. Read procedures through be- fore beginning the job. Control arm, removing and installing (6-cylinder models) - Raise car and remove wheel Male sure that the car is firmly supported on jack stands de- signed for the purpose. Place jack stands underneath struc- tural chassis points. Do not place jack stands under suspension parfs. Cars equipped with vertical headlight adjustment system: Disconnect control arm from level sensor. Remove control arm fasteners (arrows). Lightly tap inner control arm mounting bolt out of subframe.
Front Suspension < Use BMW special tool 31 2 240 or equivalent to separate control arm ball joint from steering ltnuckle. - When installing control arm, make sure all thread bores. bolts, nuts and mating surfaces are clean. - Install bushing end of control arm to subframe, using wash- ers on both sides of bolt and a new self-locking nut. Do not tighten nut at this time. - Install control arm ball joint to steering lknucltle using a new self-locking nut. Tighten fully. - Install wheel and lower car. - Load car to normal loaded position as described under Ride height. See 300 Suspension, Steering and Brakes-Gen- eral. Bounce suspension a few times. - With car on ground and loaded, tighten control arm bushing through-bolt. Tightening torques Control arm to steering ltnuckle 80 Nm (59 ft-lb) Control arm to subframe 110 Nm (81 It-lb) Road wheel to hub 120ilO Nm (8957 it-lb) Control arm, removing and installing (V-8 models) - Raise car and remove wheel WARNING- Make sure that the car is firmly supported on jack stands de- signed for the purpose. Place jack stands underneath struc- tural cliassis points. Do not place jack stands under suspension parts. Loosen and remove stabilizer bar link mounting nut (A) while counterholding ball joint (B). Disconnect stabilizer link from stabilizer bar. - Cars equipped with vertical headlight adjustment system: Disconnect control arm from level sensor.
31 0-1 4 Front Suspension 4 Mark installation position of strut tube (arrow) at steering knuckle pinch collar. NOJE- The strut tube installation position is marked on factory strut tubes: L for leff and R for right. Marking the strut tube is not necessary if factory marks (L or R) are still visible. CAUTION- Use paint, not a scribe tool, to mark location of strut tube. Counterhold strut tube nut. bolt (arrow) while loosening 4 Spread steering ltnucltle pinch collar with BMW special tool 31 2 200 to release strut tube. - Pull steering knuckle down so that strut tube slides up far enough to gain better access to control arm nut.