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In this video, we're replacing the timing chain tensioner of an E46 318i with an N42 engine. This upgrade is recommended for all N42 and N46 engines used in the E46 series as well as the E90 series.
A timing chain failure is a known issue for these engines. You can lower the risk by replacing the timing chain tensioner with a new version. The upgrade is recommended even when there are no acute problems. The version of the tensioner can be determined by looking at the hexagon head of the tensioner: If it is slim, it's the new version.
Part Numbers:
➥ Timing Chain Tensioner: 11317567680 (Version 2)
➥ Timing Chain Tensioner: 11318685091 (Version 3) ( amzn.to/2DYiJsn )
Required Tools:
➥ Ring wrench size 27
➥ Torx 20 (only required for E90's air intake )
Repair costs:
Original: ~55 EUR
OEM: ~25 EUR (recommended manufacturer: Febi Bilstein)
Difficulty: Easy
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