[Fot] Mystery Or common fault

[JS Performance Motoring, LLC]

Hi Mike,

I had the same issue recently on a street TR6 engine.  It was a tired, but
running engine.

We sorted through a whole box of caps before finding one that was close
enough to be cut/ line honed.  That's been my experience anytime I've had
to replace a cap, there seems to be a ton of variation from block to block.

Jason Sukey
JS Performance Motoring, LLC
440.984.7720
jason at jsperformancemotoring.com
https://www.facebook.com/JSPerformanceMotoring/


On Sun, Feb 18, 2024 at 8:50 AM Michael Deweerd via Fot <fot at autox.team.net>
wrote:

> WE tore down the TR4engine yesterday to check the bearing wear and give it
> a once over before the new race season starts. Everything looked great till
> I removed the front main bearing cap. Is this a common fault? Has anyone
> had this before and what would cause the main cap to break?  It's not a
> fresh crack so I was racing this way.....time to buy a lotto ticket?
> Dragged a spare engine out from the engine shed and will send it to the
> machine shop on Monday.
> I checked a few other mains and nothing I have lines up close enough to
> line hone ...also a Triumph thing?
> [image: image.png]
> --Cheers!!!
> *Mike Deweerd*
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