Genuine Volkswagen Transporter Piston

Volkswagen Transporter Piston Parts and Q&A

• Piston
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  Q: What steps should be taken for proper piston and piston ring maintenance during cylinder removal on Volkswagen Transporter?

  A:

  When the Cylinder Heads are removed it is possible to draw off the cylinders, after marking first their positions when off the pistons. The piston and rings should be examined after being removed to ensure that they are not damaged and the pistons should be oriented correctly when turning the crankshaft to avoid foul-up. Piston rings may be removed by sprinkling their ends and pulling them out of grooves. To disengage the piston with the connecting rod, the circlip is to be removed off the piston boss, and the gudgeon pin forced out, any obstruction being encountered it is worth warming the piston. The pistons are to be labelled to be installed again, with the number of cylinder and the facing side marked. Piston wear and cylinder bore wear may contribute to unreasonable use of oil and engine noise, which impact power output. The fact that the gaps between the piston rings could be measured may give an indication of whether new rings are required or not in case they surpassed the stipulated rules. The level of wear on pistons and cylinders must be evaluated simultaneously because in some cases, it is only the pistons that are to be replaced. The initial check of cylinder wear may be made with the help of the touch of ridges and the measurements with the tools. In the case of a uniform bore cylinder, new pistons can be used, however a more common and cost effective option when replacing pistons is a reboring. Besides, it is important to check the clearance of the piston ring side, where the excess of its wear may lead to a piston change. The cylinder should be rebored twice after which new ones should be put in place.