Alastair,

The master link with the clip is not recommended for this application. It is sometimes found with a timing chain for use when rolling in the new chain.

If I were you, I would remove the valve cover, roll that link to the top, remove it and peen in a solid link.

If you insist on leaving the clipped link, you should ensure that the clip is running in the right direction. With the clipped link at the very top of the crankshaft sprocket, the notch in the clip should be toward the passenger side.

In a diesel, there is absolutely nowhere for the valves to go in the event of a timing chain failure or separation except into the pistons. This means almost total engine catastrophy if it occurs. I would strongly recommend that you peen or press a permanent link in place of this clipped link.

Best of luck,