Filed Under (BMW) by admin on 17-09-2010
Remove upper cover from radiator. Remove alternator cooling hose. Remove fan wheel and fan coupling from water pump, refer to Fan Clutch, Service and Repair. Lift expanding rivets from left and right sides of fan cowl. Press center of fan cowl gently backwards and disconnect guide tab. Extract fan cowl and fan jointly.Installation: When installing fan cowl, attach left and right tabs to radiator brackets. Connect guide tab in upper center.
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Filed Under (BMW) by admin on 05-09-2010
Only open sealing cover on expansion tank when engine has cooled down. Drain coolant, refer to Cooling System – Service and Repair – Procedures See: Service and Repair Remove fan cowl, refer to Fan Shroud – Service and Repair – Procedures See: Fan Shroud/Service and Repair Note: When removing the fan cowl, note the engine variant. Air conditioner Disconnect plug connection on temperature switch. Disconnect upper water hose. Disconnect lower water hose. 2000 BMW Z3 Roadster 2.5 (E36/7) L6-2494cc 2.5L DOHC (M52 TU) Disconnect expansion hose. Automatic transmission Remove transmission oil cooler lines, catch transmission oil as it escapes and dispose of correctly. Installation: Check transmission oil level and correct if necessary, refer to Transmission and Drivetrain. Check connection for leaks. Unfasten left and right radiator mounts by pressing detent down with screwdriver. Sectional view of radiator mount: 1. Screwdriver 2. Front trim 3. Retaining lug for radiator
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Filed Under (BMW) by admin on 02-09-2010
Removing intake air housing with mass air flow sensor, refer to Powertrain Management. Remove bulkhead heater (air collector). This operation is described in section on removing complete wiper console, refer to Wiper and Washer Systems. Place cable channel to one side. Remove adapter from brake force booster. Remove cover from injection valves. Unclip plug connections from oxygen sensors. Unfasten plug connection from VANOS solenoid valve. Lift connector strip off injection valves and place to one side
Filed Under (BMW) by admin on 25-08-2010
Removing intake filter housing with mass air flow sensor, refer to Powertrain Management Removing cylinder head cover, refer to Valve Cover Removing all spark plugs. Removing intake air manifold, refer to Intake Manifold Removing VANOS adjustment unit, refer to Camshaft, Lifters and Pushrods, Camshaft, Engine. Unfastening sensor for cylinder recognition, refer to Powertrain Management, Cylinder Identification Sensor, Service and Repair. Drain off coolant and dispose of correctly. Installation: Tightening torque, refer to Engine Specifications Bleeding cooling system and checking for water leaks, refer to Cooling System Remove exhaust pipe from exhaust manifold. Release water hose from branch flange. Unfasten heating intake and heating return hoses. Removal of cylinder head is described separately from installation. Assembly sequence for removal and installation is different. Unfasten screws and remove washer from exhaust camshaft. Unfasten nuts from thrust washer (intake camshaft).
Filed Under (BMW) by admin on 11-06-2010
1. Use a scan tool to monitor the fuel trim numbers and the Mass Air Flow (MAF) sensor data stream grams/sec readings. Nominal
values are 5 grams/sec at idle in Park, and >150 at Wide Open Throttle (WOT) and 5000 RPM, in gear. Some scan tools have a freeze frame feature, which is useful in trouble shooting if the problem is set at idle versus at cruise. Vacuum leaks and crankcase breather problems generally show up at idle. Voltage at the airflow meter should be .7-.9V at idle and increase from there with more airflow. 2. Monitor the crankcase vacuum with a vacuum gauge, which can be adapted onto the tube for the oil dipstick. Specification for the crank case vacuum is 8 to 15 millibar, this equals about 1/4 to 1/2 PSI or pounds per square. So, 1 PSI of vacuum would be twice as much as there should be at idle. The proper method, per BMW, is to use a slack tube manometer which can be made easily with clear tubing and making it into a U shape and have it marked in inch increments then half fill it with water. When crankcase vacuum is applied to one side of the tubing it should displace 4 to 6 inches of water if the crankcase breather is working correctly. 3. Monitor the fuel pressure. It should be a constant 50 – 53 PSI.
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