"고객님이 이실직고했습니다.." M3 자가정비 실수로 인한 대참사 [EP.2]

제이특공대 : 수입차 정비 전문

26 Jan 202416:34

Summary

TLDRThe auto mechanic shares tips on repairing BMW engines, comparing older twin turbo models to newer single turbo versions. He demonstrates tools from a German brand, praising their quality and durability. While working on a BMW, he discovers worn cam carriers causing noise, and a worn camshaft, though the engine block seems fine. He will do a full inspection when disassembled to find the issues causing intermittent misfires that led the owner to attempt repairs.

Takeaways

😊 The oil pressure switch broke, likely causing the engine issues
👷‍♂️ Recommends checking and replacing oil parts if needed
🛠 Opened a repair shop 1 year and 4 months ago, has done many engine and body jobs
🔧 Got new electric impact tools from a sponsorship
🚗 Most shops in Korea still use air tools, he has used electric for 5-6 years
🔨 Got a German tool brand Bosch, known for high quality
⚙️ Bosch makes many automotive parts besides tools
✂️ Likes the Bosch jigsaw blade design for safety
😕 A customer tried DIY repairs which led to more issues
🚀 Plans to fully take apart the engine and rebuild it

Q & A

What is the model of the car being worked on?
-The car model is a BMW M3.
What is the engine type and specifications?
-It is a 3.0L twin-turbo straight 6 cylinder gasoline engine.
What transmission does this car use?
-It uses a dual-clutch Getrag 7-speed automatic transmission.
What repairs and maintenance are being done?
-The technician is replacing the cylinder heads, camshafts, valvetrain components, and inspecting the engine block and internals.
What tools and equipment are being used?
- Milwaukee cordless power tools, impact wrenches, ratchets, drill/drivers etc.
What problems was the customer experiencing?
-The car had intermittent misfires, low oil pressure, and wouldn't start.
What was the cause of the no-start condition?
-Excessively worn camshaft lobes led to low oil pressure.
How many miles were on the engine?
-The engine had approximately 180,000 miles on it.
What adjustments need to be made after reassembly?
-The valve lash, cam timing, fuel trims, and other parameters will need adjustment and programming.
What is the estimated repair cost?
-Likely over $5000 in parts and labor.

Outlines

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Mindmap

Keywords

💡engine

The video focuses heavily on car engines, specifically BMW 6-cylinder gasoline engines. The narrator talks in detail about the different engine models like the N54, N55, S55, etc., their components like turbochargers, valve systems, camshafts, and repairs/maintenance required.

💡turbocharger

Turbochargers are devices that increase the power output of an engine by pushing extra compressed air into the combustion chamber. The video compares twin turbochargers in older BMW engines vs. single turbo in newer ones.

💡valve

Valves control the flow of air and fuel into and out of the engine cylinders. The video discusses upgrades like BMW's Vanos variable valve timing system that improves engine performance.

💡camshaft

The camshaft operates the valves by pushing them open and closed in time with the piston movement. The video shows worn out camshafts as an engine issue.

💡cylinder

The cylinder is the combustion chamber where fuel is burned to produce power. The video examines cylinder heads and blocks for damage as part of engine diagnosis.

💡sensor

Sensors monitor various engine parameters like temperature, pressure, speed, etc. Sensor failure codes can indicate problems like overheating computers.

💡computer

The engine computer or ECU controls all aspects of engine operation. The video emphasizes the need to cool ECUs which can overheat from excessive workloads.

💡repair

The video demonstrates steps in diagnosing engine issues and determining repair needs, like replacing worn camshafts, cylinder heads, etc.

💡maintenance

Regular maintenance like changing oils, filters and plugs is discussed as important for engine health and preventing bigger repairs.

💡tuning

Electronic tuning tools are shown being used to adjust engine timing by checking and correcting camshaft positions relative to crankshaft.

Highlights

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