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Home / Car Engines / BMW Engines / BMW M50B24TU

BMW M50B24TU Troubleshooting

Engine will not start or starts up hard

No gasoline in tank - Fill fuel up.
Wrong fuel grade - Use quality gasoline.
Clogged fuel system - Remove clogging.
Spark plug wiring connection is defective - Check the spark plug wire connection, repair or replace.
Faulty spark plug - Spark plug need to be replaced.
Ignition failure - Check ignition and replace faulty components.
Fuel filter is dirty - Replace fuel filter.
Restricted fuel lines - Service fuel lines.
Dirty or damaged fuel pump - Clean or replace fuel pump.
Clogged or defective fuel injectors - Service or change fuel injectors.
Low engine compression - Inspect cylinder block and change defective components.

Engine runs roughly

Ignition system malfunction - Check ignition system and replace faulty parts.
Air filter is dirty - Service or replace air filter.
Defective spark plug - Install new spark plug.
Clogged or defective fuel pump - Check fuel pump and replace if necessary.
Improper valve clearance - Need to adjust valve clearance.
Ignition timing is incorrect - Set the ignition timing properly.
Too low idle RPM - Correct the settings.

Engine starts but stalls suddenly

Faulty spark plug - Install new spark plug.
Dirty or damaged fuel injectors - Service or change fuel injectors.
Ignition coil is defective - Ignition coil must be replaced.
Bad or broken valve springs - Replace valve springs.
Stuck valves - Service the valves.

Engine overheated

Engine oil insufficient - Fill the crankcase with engine oil.
Engine overloaded - Load reducing is recommended.
Fuel injectors are dirty - Need to clean fuel injectors.
Ignition timing is wrong - Set the ignition timing properly.
Incorrect valve setting - Set the valves correctly.
Damaged radiator cap or dirty radiator core - Clean radiator or replace cap.
Lack of coolant in cooling system - Refill to the correct level and inspect system for leaks.
Damaged thermostat - Replace thermostat.
Defective water pump - Replace water pump.

Engine knocking sound or abnormal noise

Low octane gasoline - Change gasoline.
Engine is under excessive load - Reduce the load.
Engine oil insufficient - Fill the crankcase with engine oil.
Too low idle RPM - Correct the settings.
Fuel pump is dirty or defective - Service or change fuel pump.
Main bearings or crankshaft wear - Replace crankshaft or bearings.
Incorrect valve clearance - Adjust valve clearance.
Cylinder bore or piston rings are worn - Change defective parts.

Lack of engine power

Fuel injectors are defective or dirty - Check fuel injectors and replace if necessary.
Air filter element is plugged - Change or service air filter.
Fuel pump is dirty or defective - Test fuel pump and replace if necessary.
Ignition system problems - Inspect ignition system and change faulty parts.
Damaged cylinder-head gasket - Replace the gasket as required.
Burned or stuck valves - Change or service valves.
Cylinder block parts are worn out - Change defective components.
Dirty oil filter element - Replace or clean oil filter.

Excessive fuel consumption

Plugged air filter - Replace or clean air filter.
Dirty or faulty fuel injectors - Test fuel injectors and change if necessary.
Spark plug is defective or loose - Tighten or change the spark plug.
Ignition timing is incorrect - Adjust ignition timing correctly.
Valves are stuck, burned, or worn - Clean or replace valves.
Worn piston, rings, or sleeve - Replace defective parts.
Valve clearance is not correct - Adjust valve clearance.
Poor compression - Inspect and replace wear parts.

Engine using too much oil

Damaged seals or gaskets - Worn parts need to be replaced.
Valve guides and stems are worn - Valves need to be changed.
Piston rings are stuck or worn - Piston rings replacement required.
Cylinder liner or piston is scored - Check liner and piston, replace as required.

Engine backfires

Fuel injectors are clogged - Service or replace fuel injectors.
Restricted fuel lines - Clean fuel lines.
Wrong ignition timing - Adjust ignition timing as required.
Improper valve setting - Set the valves properly.
Air filter is blocked - Service or replace air filter.

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Engines Technical Specifications
BMW M20B23 BMW M40B18 BMW M43B16 BMW M50B24TU
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NISSAN HR12DE NISSAN A12 NISSAN A15 NISSAN CA18DET
BRIGGS 28S777 BRIGGS 31H777 BRIGGS 31P977 BRIGGS 31Q777
MERCURY 150 MERCURY 175 XRI MARINER 135 MERCURY 200 EFI
KAWASAKI FH430V KAWASAKI FR600V KAWASAKI FX541V KAWASAKI FD611V
HONDA GC135 HONDA GCV160 HONDA GS190 HONDA GX340
KUBOTA D1305 KUBOTA D1503 KUBOTA V1903 KUBOTA 2003T
KOHLER CH18S KOHLER CH680 KOHLER CV460S KOHLER SV735S