Honda Bmw 5 Service Manual
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Driveshaft Driveshaft problems and causes Symptom Probable cause Corrective action Vibration when starting off Center bearing rubber deteriorated. Inspect center bearing and rubber. Replace if necessary. (forward or reverse) Flex-disc damaged or worn. Inspect flex-disc. Replace if necessary. Engine or transmission mounts faulty. Inspect engine and transmission mounts. Align or replace, if necessary. Front centering guide worn, or driveshaft Checic front centering guide and replace if necessary. mounting flanges out of round. Check runout of driveshaft flanges. Universal joint worn or seized. Check universal joint play and movement. Replace driveshaft if necessary. Driveshaft misaligned. Check driveshaft alignment. Noise during onloff throttle Final drive components worn or damaged Remove final drive and repair. 331 Final Drive or when engaging clutch. (excessive pinion-to-ring-gear clearance). Drive axle or CV joint faulty. Inspect drive axles and CV joints. Repair or replace as necessary. 331 Final Drive Vibration at 25 to 30 mph Front centering guide worn, or driveshaft Check front centering guide and replace if necessary. (40 to 50 kmlh). mounting flanges out of round or damaged. Check runout of driveshaft mounting flanges. Universal joint worn or seized. Check universal joint play and movement. Replace driveshaft if necessary. Flex-disc damaged or worn. Inspect flex-disc. Replace if necessary. Center bearing rubber deteriorated. Inspect center bearing. Replace if necessary. Misaligned installed position. Check driveshaft alignment. Vibration, audible rumble Front centering guide worn, or driveshaft Check front centering guide and replace if necessary. over 35 mph (60 kmlh). mounting flanges out of rouncl or damaged. Check runout of driveshaft mounting flanges. - - Mounting flange bolts loose or holes worn. Remove driveshaft and check transmission output flange and final drive input flange. Replace if necessary. Driveshaft unbalanced. Check driveshaft for loose or missing balance weights. Have driveshaft rebalanced or replace if necessary. Universal ioint worn or seized. Check universal ioint ~lav and movement. Reolace .. driveshaft if necessary. Center bearing faulty. Replace center bearing. . Final drive rubber mount faulty. Inspect final drive rubber mount and repiace if necessary. Driveshaft misaligned. Check driveshaft alignment.
Driveshaft Repair kits for the universal joint are not available for BMW driveshafts. A worn or damaged universal joint usually require replacement of the driveshaft. The driveshaft is balanced to close tolerances. Whenever it is to be removed or disassembled, the mounting flanges and driveshaft sections should be marked with paint or a punch before proceeding with work. This will ensure that the drive- shaft can be reassembled and installed in exactly the original orientation. 1. Rear section of drive shaft 2. Hex bolt, MI2 x 1.5 x 25 3. Knurled bolt 4. Clamp 5. Reinforcement 6. Seal 7. Constant velocity joint 8. Circlip 9. Hex nut 10. Hex bolt, M12x 1.5~58 11. Centering sleeve 12. Flexible disk 13. Self-locking hex nut 14. Front section of driveshaft 15. Center bearing 16. Dust cover (some models) 17. Spacer (some models) -
Driveshaft, aligning The alignment of the driveshaft does not normally need to be checked unless the engineltransmission or the final drive have been removed and installed. if ail other parts of the driveshaft have been inspected and found to be okay, but there is still noise or vibration, driveshaft alignment should be checked. There are two important driveshaft alignment checks. The first is to make sure that the driveshaft runs straight from the transmission to the final drive, without any variation from side- to-side caused by misalignment of the engineltransmission in its mounts. Make a basic check by sighting along the drive- shaft from back to front. Any misalignment should be appar- ent from the center bearing forward. To adjust the side-to-side alignment, loosen transmission or engine mounts to reposition them, then retighten mounts. The driveshaft should be exactly centered in driveshaft tun- nel. The second important driveshaft alignment check is more complicated. It checlts the amount the driveshaft is angled vertically at the joints. This angle is lknown as driveshaft deflection. In general, there should be little deflection in the driveshaft between the engine, the center bearing, and the final drive. Precise checks require the use of a large protractor or some other means of measuring the angle of the engine and the fi- nal drive and comparing these angles to the angle of the . . driveshaft sections. - To change the deflection angle, shims can be placed be- tween the center bearing and the body or between the trans- mission and its rear support. When using shims to change a deflection angle, keep in mind that the angle of adjacent joints will also change. Deflection angles should be as small as oossible.
-.- . / Driveshaft Driveshaft, removing CAUTION- . Be sure the wheels are off the ground before removing the driveshak Set the parl(ing brake before removing the driveshaft. Once the driveshaft has been removed, the vehicle can roll regardless of whether the transmission is in gear or not. The driveshaft is mounted to the transmission and final drive with self-locliing nuts. These nuts are designed to be used only once and should be replaced during reas- sembly. Remove complete exhaust system. See 180 Exhaust System. - Remove exhaust heat shields. - Support transmission with transmission jack. < Loosen transmission mount nuts (arrows) on real transmission support crossmember. - Release wiring harness retainers from rear transmission support crossmember. < Remove mounting bolts (arrows) for rear transmission sup- port crossmember. Slide crossmember rearward to remove. - Matchmark front and rear driveshaft halves to corresponding transmission output and final drive input flanges. 4 Remove nuts securing driveshaft mounting bolts at transmis- sion output flange. Counterhold bolts (arrows) at transmis- sion flex-disc. Discard old nuts. - Hang driveshaft front section from body using stiff wire.
4 Remove nuts (arrows) from constant velocity joint mounting bolts at final drive. Pry constant velocity joint free from final drive input flange at groove (A). - Hang driveshaft rear section from body using stiff wire. < Do not let driveshaft hang unsupported, as rear CV joint rub- ber boot (arrow) may be damaged. 4 Remove center support bearing mounting nuts (arrows) - Remove driveshaft. Pull down on center of driveshaft to facilitate removal. CAUTIOI\C Protect CVjoint with plastic cover.
260-1 0 / Driveshaft Driveshaft, installing - Prepare CV joint for reinstallation: Extend joint to limit. Clean off old grease and fill with fresh grease Install new seal. - Bend driveshaft slightly at center universal joint to install CAUTION- Do not allow CVjoint seal to become displaced. - Align matchmarlts on driveshaft to matchmarks on final drive and transmission flanges. - Fit constant velocity joint to final drive input flange. Alternate- ly tighten two opposite nuts to draw constant velocity joint evenly into the final drive input flange. Once seated, tighten down remaining nuts. I CAUTION- I Do not reuse self-locking nuts. These nuts are designed to be / I used onlv once. 1 - Insert bolts in front of driveshafl to transmission output flange. Counterhold each bolt while tightening nut. CAUTION- . Do not reuse self-locking nuts. These nuts are designed to be used only once. Avoid stressing the flex-disc when torquing the bolts. Do this by counterholding the bolts and turning the nuts on the flange side. - Position center support bearing and install mounting nuts. Use new self-locking nuts. - Install heat shields. - Install rear transmission support crossmember. - Install exhaust system. See 180 Exhaust System. Reconnect oxygen sensor wiring harnesses and reattach wiring harness retainers to rear transmission support crossrnernber.
Driveshaft - Road test vehicle to check for noise or vibration CAUTION- Do not reuse self-locking nuts. These nuts are designed to be used only once. Avoid stressing the flex-disc when torquing the bolts. Do this by counterholding the bolts and turning the nuts on the flange side. Tightening torques Alunlinum driveshaft to flex-disc - MI2 (use coated washers) 90 Nm (66 ft-lb) Driveshaft CV joint to final drive flange Mi0 (Tom bolt) 70 Nm (51 ft-lb) M8 (compression nut) 32 Nm (24 ft-lb) Flex-disc to transmission flange or driveshaft MI0 (8.8 grade) 48 Nm (35 ft-lb) MI 0 (1 0.9 grade) 60 Nm (44 ft-lb) - Mi2 (8.8 grade) 81 Nm (60 ft-lb) - MI2 (10.9 grade) I00 Nm (74 ft-lb) MI4 140 Nm (103 ft-lb) Transmission crossmember to transmission (ME) 21 Nm (15 ft-lb) . to chassis (M10) 42 Nm (30 ft-lb) NOTE- Boltgrade is marked on the bolt head. When replacing bolts, only use bolts of the same strength and hardness as the orig- inals installed. Flex-disc, replacing - Checlc flex-disc between front section of driveshafl and trans- mission output flange for craclts, tears, missing pieces, or distortion. Check for worn bolt hole bores in flange. - If flex-disc needs replacement, remove driveshafl as de- scribed earlier. - Unbolt flex-disc from driveshaft. NOTE- Removal andinstallation of the bolts may be made easier by placing a large hose clamp around the flex-disc, and tighten- ing the clamp slightly to compress the rubber.
260-1 2 1 Driveshaft Install new flex-disc using new self-locking nuts. Molded ar- rows (arrows) on coupling should point towards flange arms. 4 On vehicles with aluminum driveshaft, use coated washers to prevent contact corrosion. - Counterhold bolts while tightening nuts. Tightening torque Aluminum driveshaft to flex-disc M12 (use coated washers) 90 Nm (66 ft-lb) Steel driveshaft to flex-disc MI0 (8.8 grade) 48 Nm (35 ft-lb) - MI0 (10.9 grade) 60 Nm (44 ft-lb) Coated washers - MI2 (8.8 grade) 5027500 . Mi2 (10.9 grade) M14 81 Nm (60 ft-lb) 100 Nm (74 ft-lb) 140 Nm (103 ft-lb) - Install driveshaft as described earlier Center bearing assembly, replacing The center bearing assembly consists of a grooved ball bear- ing in a rubber mount. The bearing assembly is pressed the driveshaft. - Remove driveshaft. See Driveshaft, removing - Matchmark front and rear driveshaft sections before separating. Remove bolt (arrow) securing front and rear halves of driveshaft and pull driveshaft apart. - Remove shim and dust shield, where fitted - Use puller to remove center bearing assembly from driveshaft. onto
- On installation, drive new center bearing firmly to stop. Reassemble driveshaft using matchmarks made prior to disassembly. - Clean threads and install bolt securing driveshaft halves. Use thread locking compound LoctiteO or equivalent. Tightening torque Driveshaft front half to rear half (use thread locking compound) 97 Nm (72 fl-lb) - Install driveshaft as described earlier. Front centering guide, replacing The front centering guide centers the driveshafl in relation to the transmission. The guide is press-fit into a cavity in the front of the driveshafl and slides onto the transmission output shaft. No specifications are given forwear of the guide, but general- ly the guide should fit snugly on the transmission output shafl. NOTE- Some driveshafts have a dust cap installed on the end of the driveshaft, over the centering guide. The dust cap may be- come bent or distorted when the driveshaft is removed or in- stalled. Damage to the dust cap should not affect the centering guide and should not be mistaken for guide wear. - Remove driveshafl as described earlier - Pack cavity behind centering guide with heavy grease until grease is flush with bottom edge of guide. - Insert 14 mm (approximately 9/16 in.) diameter mandrel or metal rod into guide. Strike guide with hammer to force cen- tering guide out. NOTE- Tlie mandrel should fit snugly in the centering guide so that the grease cannot escape around the sides of the mandrel. - Remove old grease from driveshaft, lubricate new centering guide with molybdenum disulfide grease (MolykoteO, Long- term8 2 or equivalent) and drive it into driveshaft. 4 When installing new driveshafl centering guide, be sure seal- ing lip of guide faces outward. Drive guide into driveshaft to a protrusion depth of 4 - 6mm (0.16 - 0.24 in.). - Install driveshaft as described earlier.
260-14 Driveshaft Constant velocity (CV) joint, replacing The CV joint at the rear of the driveshaft is available from BMW as a separate part. - Remove complete driveshaft as described earlier in this section. < Clean grease off CV joint. Remove retaining circlip (arrow) from CV joint end of driveshaft. - Drive out bolts from CV joint. 4 Remove CV joint from driveshaft: Pry back protective boot (A). - Using BMW special tool 26 1 110 on inner race (B), press or pull joint off shaft. - Check protective boot for damage. Replace if necessary. - lnstall new CV joint: . Working from both sides of joint, inject approximately 80 grams of OptimolB grease (or equivalent) into joint. Install new sealing gasket on joint face that mates with pro- tective boot. Seal fits in groove on outer race of joint. Clean grease off driveshaft and mating splines on joint. Apply LoctiteO 648 to driveshaft splines. Press new CV joint onto shaft as far as it will go. CAUTIOI\C Only press on inner CVjoint race. - Install new retaining circlip to end of driveshaft, - Insert CV joint mounting bolts. Be sure to reuse washers. - Install driveshaft as described earlier in this section.