1.Thread lock on the portion of the Bolt that fits into the Aluminum Timing Cover.
('Careful,don't want any of that Loctite into the Engine Oil)

[And Yeah,they're calling for "Clean thread and coat with sealant."]

2. A Timesert insert into the Timing Cover [Would be a Permanent Fix]
BUT you'd wanna R+R the Timing Cover to do that.The threaded Bolt hole
is open to the Timing chain cavity on the Inside.

[I feel for you,I was the Over Torque champion in Jr. High."What's a Torque Wrench and why would you need one?]

1 N-m = 0.737561 lb-ft
100 N-m = 73.7561 Lb-Ft

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'84 300SD sold
124.128