A linkless chain would require that the front cover, oil pan (small one) and oil pump to be removed. I think that is all. Most new chains are pulled in when the old chain is removed so a master link is required unless you have the tools to install a new link that is like all the rest of the links in the chain. If the old chain breaks then a linkless chain could be used because you will have the engine apart fixing all the damage done.

Paul

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84 500 SEL (307,xxx miles)