Timing chain tensioner

[Zulfiqar]

The timing chain tensioner on my cars engine 606 is leaking from the crush washer where it screws into the engine, Ive searched the threads - and looked up the FSM - it says to pump the tensioner with engine oil - I can do that - but when I remove it from the engine wouldnt it already be filled with oil by pumping it - I figured pumping it in a can of oil with jack against a subframe of the car.

I planned to remove tensioner and install a new crush washer with a little hylomar or type 2 sealant - is it doable - any hints to prevent disaster - like overloading the chain.