Time-sert is a four piece install kit.  Drill bit to drill the hole. Tap to tap the hole.  Countersink the timesert shoulder goes into the block and is hence flat with the block.  Insert tool.  End result...your drain plug will still be flat with the block.  The kit also includes a sealing agent that seals between the timesert and the block.
Z
 

    On Saturday, April 14, 2018, 5:28:44 PM MDT, Michael A. Radtke <wa7zpu@5BY9.NET> wrote:  
 
 Frank,

I see that Time-Sert is a competitor of Helicoil.  I hadn't heard about
them before.  But, I do see a problem.

As you pointed out, the Time-Sert has a shoulder that extends beyond
the original sealing surface.  I agree the that the seal will then be
between the drain plug and the Time-Sert if an OEM copper crush gasket
is used.  However, what prevents oil from leaking though the junction
of the threads on the outside of the Time-Sert and the engine case?  Is
the Time-SertAnd threaded in with some sort of sealant?  And, if the
leak is from a crack in the original steel insert and the adjoining
case (11 o'clock on the photos), sealing with a Helicoil replacement
will do nothing.  Please keep in mind that the Helicoil, OEM drain plug,
and cardboard gasket worked fine for 20 years.

Thanks,
Mike

------------------------ Original Message ------------------------
Date: Sat, 14 Apr 2018 08:01:11 -0500
From: Frank Condelli <RAlanen@AOL.COM>
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Mysterious Oil Drain Plug Leak

        Mike, use a Helicoil Time-Set instead of an ordinary Helicoil.
The Time-Sert is a solid insert and will give better results if
installed correctly.  The surface for the OEM drain plug will be
restored with the Time-Sert thereby allowing the use of the OEM drain
plug and a copper crush gasket.

Frank