Though it might work, I would advise against doing so. MIG welds in cast are
no good. They have almost no structural strength and change the structure of
the cast metal. Although it is only localized it creates a weak spot in the
cap.
Cheers, Gernot
> ----------
> From:
> Aribert_Neumann@magna.on.ca[SMTP:Aribert_Neumann@magna.on.ca]
> Reply To: Aribert_Neumann@magna.on.ca
> Sent: Monday, June 21, 1999 12:56 PM
> To: The Garrisons
> Cc: triumphs@autox.team.net
> Subject: Re: TR6, pinning the old thrust washers; how?
>
>
> I had never heard of pinning the thrust washers prior to joining this list
> and would have considered doing this had I known about this procedure when
> I built up my current engine four years ago. Upon dismantling my GT-6
> engine I noticed that one of the thrust washers had fallen out at some
> earlier time (I was blissfully unaware of this problem). When I rebuilt
> the replacement (TR-6) engine I observed how little surface area on the
> main bearing cap is holding the thrust washer in place. I welded a small
> amount of material onto the side of the main bearing cap and filed the
> buildup down so that I ended up with an extra .030 in. of local cross
> section to support the thrust washer. Either it is working as intended or
> I'm (again) blissfully unaware. To weld on the main cap, I removed the
> alignment sleeves and clamped the cap to a copper plate to provide a
> backing surface to weld against. I used a mig welder with a few short
> bursts to keep the heat low.
>
>
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