Honda Bmw 5 Service Manual
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11 9 Lubrication System General ............................ 11 9-2 Special tools ......................... 11 9-2 ..................... Engine lubrication 11 9-3 Troubleshooting .................... 11 9-3 ................. Oil pressure. checking 11 9-4 ...... Oil pressure warning system. testing 11 9-5 Crankshaft Rear Main Seal ......... .I1 9-6 Crankshaft rear main seal. replacing (6-cylinder) .................. 11 9-6 Crankshaft rear main seal. replacing (V-8) . . 11 9-8 Engine Oil Pan .................... .I1 9-10 Oil pan. removing and ................. installing (6-cylinder) .I1 9-10 Lower oil pan. removing and installing (V-8) ....................... 1 19-1 3 Upper oil pan. removing and installing (V-8) ....................... 11 9-1 5 .......... Component Replacement 11 9-20 Oil pressure warning switch. replacing .................. (6-cylinder and V-8) 11 9-20 Oil level warning switch. replacing .................. (6-cylinder and V-8) 11 9-21 Oil pump. removing and ................. installing (6-cylinder) 11 9-22 Oil pump. removing and installing (V-8) . . 11 9-24 ..... Oil pressure relief valve (6-cylinder) 119-26 .......... Oil pressure relief valve (V-8) 11 9-27
11 9-2 Lubrication System This repair group covers lubrication system troubleshooting as well as oil pan removal and oil pump replacement. In 6-cylinder models, removal of the oil pan requires the re- moval of the exhaust system and some front suspension components. Those procedures are fully covered in: 180 Exhaust System 210 Clutch 230 Manual Transmission 0 240 Automatic Transmission 310 Front Suspension 320 Steering and Wheel Alignment NOTE- Oil change procedure and oil filter replacement are covered in 020 Maintenance. CAUTIOG V8 engines: The oil pump fasteners (including the sprocket retaining nut) are known to vibrate loose. This can result in oil starvation and engine failure. Be sure to check oil bolts and nut tightness whenever the oilpump is accessible. If any fas- teners are found to be loose, remove them and reinstall with Loctite Band torque to specifications. Special tools The engine needs to be properly supported while the front suspension subframe is lowered to access the oil pan. A standard oil pressure gauge may be used for measuring oil pressure. Engine support bracket (Tool No, BMW 00 0 20012011202~2041208) 4 6-cylinder crankshalt rear main seal tools (Tool No. BMW 00 5 50011 1 1 260)
1 19-3 Lubrication System V-8 crankshaft rear main seal tool (Tool No. BMW 11 1 230) I i 4 V-8 crankshaft rear main seal ouide 4 Adapter for BMW oil pressure gauge (Tool No. BMW 11 4 050) Engine lubrication Oil pressure is generated by a gear-type pump bolted to the bottom oi the engine block. The oil pump is chain driven off the front of the crankshaft. Table a. Engine oil capacity (includes oil filter replacement) 6-cylinder 6.5 liters (6.9 US qt) V-8 7.5 liters (7.9 US qt) The oil pressure warning system consists of an oil pressure switch mounted in the oil circuit and an instrument panel warning light. Other saiety features include: Q A filter bypass to provide lubrication should the oil filter be- come clogged. An oil pump pressure relief valve to prevent excessive sys- tem pressure. CAUTIOI\C If the red oil pressure warning light comes on or flashes on while driving, always assume that the oilpressure is low. Stop the engine immediately and make arrangements to test oil pressure.
- I Lubrication System - I Oil pressure, checking The oil pressure warning switch is located at the base of the oil filter housing. In 6-cylinder engines access to oil pressure warning switch connector (arrow) is extremely restricted (intake manifold re. moved for the purpose of illustration). V-8 engine oil pressure warning switch (arrow) is at base of oil filter housing on left engine compartment inner fender. Oil pressure is tested by removing oil pressure switch and in- stalling oil pressure gauge in its place. Unscrew oil filter cap in order to allow engine oil to drain back down into oil pan. Disconnect harness connector from oil pressure switch and remove switch. NOJE- Thoroughly clean around the oil pressure switch before removing it. Be prepared to catch leaking oil with a shop towel. - Install pressure gauge in place of oil pressure switch, - With gauge installed, start engine and allow to reach operat- ing temperature. Check oil pressure. See Table b. NOJE- For the most accurate test results, the engine oil and filter should be new. The oil should be the correct grade. Table b. Engine oil pressure At idle 0.5 bar (7 psi) At elevated speed 6-cylinder engine 4.0 bar (59 psi) V-8 engine 4.5 bar (66 psi)
. .- - L - -- - - -. - -- Lubrication ~~stern - Remove pressure gauge and reinstall pressure switch with new sealing washer. Tightening torque Oil pressure switch to oil filter housing 27 Nm (20 ft-lb) If testing shows low oil pressure, one or more of the following conditions may be indicated: Worn or faulty oil pump or faulty pump pressure relief valve Worn or damaged engine bearings Severe engine wear Any of these conditions indicate the need for major repairs. Oil pressure warning system, testing 4 When the ignition is turned on, the oil pressure warning light comes on. When the engine is started and the oil pressure rises slightly, the oil pressure switch (arrow) contact opens and the warning light goes out. Make sure the oil level is cor- rect before making tests. - Turn ignition switch on. - Warning light on instrument panel must light up - Remove connector from oil pressure switch. Warning light on instrument panel must go out. NOTE- If the light does not go out, the wiring to the switch is most likely grounded somewhere between the switch terminaland the warning light See ELE Electrical Wiring Diagrams for electrical schematics. - If warning light does not light when ignition is on, remove con- nector from oil pressure switch and use a jumper wire to ground connector terminal to a clean metal surface. The oil pressure warning light should come on. NOTE- If there are two wires to the oil pressure switch, ground the brown/green wire that carries the signal to the warning light. - If the warning light comes on, check the switch as described in the next step. If the warning light does not come on, the wiring to the instrument cluster or to the light itself is faulty.
Lubrication System To test switch, connect an ohmmeter between terminal in switch body (arrow) and ground. With engine off, there should be continuity. With engine running, oil pressure should open switch and there should be no continuity. Re- place a faulty switch. CAUTION- Keep in mind that low oil pressure may be preventing the switch from turning the light out If the light remains on while the engine is running, check the oil pressure as described earlier. Do not drive the car until the problem is corrected. The engine may be severely damaged. Crankshaft rear main seal replacement requires removal of the transmission and flywheel. Crankshaft rear main seal, replacing (&cylinder) - Remove transmission. See 230 Manual Transmission or 240 Automatic Transmission. - Manual transmission vehicles: Remove clutch pressure plate and disc. See 210 Clutch. - Remove flywheel. See 210 Clutch or 240 Automatic Trans- mission. - Drain engine oil. 4 Remove seal carrier bolts from oil pan (arrows). Loosen all oil pan bolts.
Lubrication stern/ Remove remaining seal carrier bolts (arrows) and carefully remove seal carrier without damaging the oil pan gasltet. CAUTION- After removing seal carrier, checlc oilpan gasket for damage. If gasket is damaged during removal, remove oil pan (as de- scribed later) and replace gasket. < Remove old seal and install new seal into seal carrier using BMW special tools 11 1 260 and 00 5 500. NOTE- A new radial seal is used from 4/98 production, and is the only version available from BMW as a replacement. The new sealno longer uses a spring to support the sealing lip. Do not lcinlc or damage the sealing lip. Do not touch with fingers. * BMW offers the rear main seal carrier and seal in a lit A plastic support bushing, required for sliding the seal over the crankshaft, is included with the lcit. I CAUTION- 1 Do not use BMW special tool 1 I 2 213 (mstallation guide) with the new style seal. Use only the special tool supphed with the seal lcit. When reinstalling seal carrier to crankcase: Check locating sleeves for damage. Replace gasltet between rear main seal carrier and crank- case. Apply thin coat of 3 Bond 8 1209 or equivalent sealant to oil pan gasket sealing surfaces. * Lubricate crankshaft seal contact surface. Use plastic support bushing (A) that comes with seal ltit as an installation quide, fittina seal over end of crankshaft. Use - - care to push seal carrier and support bushing on straight, without tilting sideways. Remove support bushing. - lnstall seal carrier bolts and torque to specifications. 4 Use new bolts (arrows) at base of seal carrier. Coat threads with sealing compound before installing. - Install and tighten oil pan bolts.
I Lubrication System - - Remainder of assembly is reverse of disassembly. Install flywheel, clutch or torque converter and transmission. Fill engine with oil. - Run engine and check for leaks. Tightening torques Oil drain plug fo oil pan (MI21 25 Nm (18 ft-lb) Oil pan to engine block M6 (8.8 grade) 10 Nm (89 in-ib) M6 (1 0.9 grade) 12 Nm (9 ft-lb) M8 (8.8 grade) 22 Nm (1 6 it-lb) Rear main seal carrier to crankcase M6 10 Nm (89 in-lb) ME 22 Nm (16 ft-lb) Crankshaft rear main seal, replacing (V-8) - Remove transmission. See 230 Manual Transmission or 240 Automatic Transmission. - Manual transmission vehicles: Remove clutch pressure plate and disc. See 210 Clutch. - Remove flywheel. See 210 Clutch. - Drain engine oil. 4 Remove bolts (A) retaining rear main seal carrier, including bolts at (arrows) oil pan. Carefully separate seal carrier from oil pan gasket and re- move carrier. CAUTION- Do not damage oil pan gasket. < Remove old seal and reinstall new seal into seal carrier using ) BMW special tools 11 1 230 and 00 5 500.
- When reinstalling seal carrier to crankcase: Check locating sleeves for damage. Replace gasitet between rear main seal carrier and cranlt- case. Apply thin coat of 3 Bond 8 1209 or equivalent sealant to oil pan gasltet sealing surfaces. * Lubricate crankshaft and seal contact surfaces. 4 Use BMW special tool 11 2 390 as an installation guide in fit- ting seal over end of cranltshaft. Use care to push seal carrier and support bushing on straight, without tilting. Remove in- stallation guide carefully. - Replace sealing washers under seal carrier mounting bolts. - Install seal carrier mounting bolts and torque to specilica- tions. - lnstall oil pan bolts. - Remainder of assembly is reverse of disassembly. Install flywheel using new bolts, Install clutch or torque converter and transmission. * Fill engine with oil. Run engine and checlt for leaks. Tightening torques Flywheel to crankshaft (use new bolts) 120 Nm (89 ft-lb) 011 dra~n plug to 011 pan (M12) 25 Nm (18 ft-lb) Oil pan to eng~ne block M6 (8.8 grade) 10 Nm (89 in-lb) M6 (1 0 9 grade) 12 Nm (9 ft-lb) M8 (8.8 grade) 22 Nm (16 ft-lb) Rear main seal carrier to crankcase M6 10 Nrn (89 in-lb) ME 22 Nm (16 ft-lb)
11 9-1 0 Lubrication System Oil pan, removing and installing (6-cylinder) The engine oil pan removal procedure requires that the en- gine be supported from the top and the front suspension sub- frame be lowered. - Raise car and place securely on jack stands. Make sure the car is stable and well supported at all times. Use a professional automotive lift orjackstands designed for - Remove splash shield from under engine. - Drain engine oil as described in 020 Maintenance. 4 Remove oil dipsticlc guide tube: Disconnect fuel lines and wiring harness from bracket (A). - Disconnect oil separator hose (B) from base of guide tube. Remove mounting bolt (C) from left engine mounting bracket and remove tube from oil pan. NOTE- * If necessary, remove air filter assembly for better access to dipsticlc tube. The dipstick guide tube is sealed in the block using an O- ring. Check that the O-ring comes out with the tube. 4 Lift hood into assembly position: While supporting the hood, disconnect hood support struts. Raise hood and install loclting bolts (arrow) in right and left hinges. WARNING- Be sure to support hood while disconnecting support struts.