Finding air leak

[Al Smith]

I had one ,a Stihl 038 magnum that had seen over 20 years of hard service for a tree company .Blowed the seal right out of the pocket ,clutch side .Odd, new OEM seal, blowed it out again .Enough is enough ,red Loctite you could not blow it out again unless you used a charge of black powder .I own that saw now and if I ever need to change that seal it will take a heat gun to remove it

 

[merc_man]

Got that leak sealed up. It is now leaking where the clam haves bolt togeather. Would you replace seals while its apart? Or just clean, re goop and recheck? Little over 30 bucks for seals.

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[Stump Shot]

Got that leak sealed up. It is now leaking where the clam haves bolt togeather. Would you replace seals while its apart? Or just clean, re goop and recheck? Little over 30 bucks for seals.

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That's always the million dollar question, you'll get every answer there is for. I would say go with what your gut instinct tells you here.
I look if the saw has some age combined with if looks like its had a lot of use and has lost friction when you turn the crank over manually without a piston in the bore, then go ahead and change them preemptively if all of those boxes get ticked especially the last one. If not I let 'em ride.
Some will say, you're in that far go ahead and do them, only you can make the call.