"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.