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Bench Replacement of the Timing Chain on a Volkswagen Polo 9N 1.2 40 KW
Model: Volkswagen Polo
MK IV, Polo IV, Polo 4, MK 4, 9N
- Years 2001-2009
In this guide, you will learn how to replace the timing chain on a Volkswagen Polo 9N 1.2, engine code BMD, on the bench. First, remove the air filter, engine cover, and anti-dust protection. Then, take off the right wheel arch lining, the poly-V belt, the alternator, and the air conditioning compressor (it is not necessary to disconnect the pipes). You will need to adjust the timing by removing the camshaft sensor and the RPM sensor. Rotate the engine until you find the groove for the locking tool. If the chain to be replaced has already stretched, you must reset the timing before proceeding with the replacement. Remove the crankshaft pulley, then the oil sump, and finally the timing cover. Remove the oil pump chain by first taking off the tensioner, then the timing chain, pressing the sliding guide against the oil damper and securing it with an Allen key. Now, refit the new parts starting with the pulley, then tension the chain by removing the Allen key you previously inserted. Before refitting the engine, clean it thoroughly and seal it with a sealant approved by the manufacturer.
Updated on 20 August 2026 by ScegliAuto
Video tutorial
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