We strongly urge the replacement of all the elements that make up the assembly, especially the valve rocker and these push-rods which contributes to the accuracy of valve timing when overhauling the engine or cylinder head.
Don't forget to order all the gaskets and seals you may require - try this gasket sealant: 08C70K0234M as used by trade professionals.
Choose an OE cam chain and ensure accurate valve timing combined with long term durability.