Reboring 3.4 to 3.8 litre
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Junior Member
Joined: Jun 2015
Posts: 3
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From: Jaipur
Reboring 3.4 to 3.8 litre
Hi, I am restoring '52 Mark VII and want to bore to 3.8 litre.
I intend using the 87mm pistons. Do I need to change the head?
Also advice what all I need to change, Valves, bearings etc.
Regards,
Dev
I intend using the 87mm pistons. Do I need to change the head?
Also advice what all I need to change, Valves, bearings etc.
Regards,
Dev
Veteran Member
Joined: Dec 2009
Posts: 9,542
Likes: 2,544
From: Crewe, England
I would not recommend doing what you propose. When the 3.4 was a current engine in the 50s, some people did what you propose and found the block cracked between the bores due to not enough metal being left after boring.
It was for this reason that Jaguar used thin steel liners when they developed the 3.8 litre engine, and some changes were made to the block as well.
It was for this reason that Jaguar used thin steel liners when they developed the 3.8 litre engine, and some changes were made to the block as well.
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