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[Mgs] Fore and Aft Rod Movement

Subject: [Mgs] Fore and Aft Rod Movement
From: BDavis <>
Date: Fri, 16 Oct 2009 17:04:20 -0700 (PDT)
I have a question about rod bearings on an MGB journal and would like some 
opinions, please. 

Can there be 'any' lateral (forward - backward) rocking movement of a rod, up 
at the piston, when the piston is at TDC (no rings on the piston)? 

Reason for the question: I can 'rock' the rod slightly in the bearing. I have 
some forward-backward movement at the top of the rod - not a lot but would have 
thought that the rod would not be allowed to do this.

These are 'new' Std. bearings (1,600 miles of use) on a new Std. crank and show 
normal wear. They were plastigaged at between 1 and 1.5 thou. between bearing 
and journals when installed. I have not plastigaged them again but as I say 
they show minimal wear for those few miles.

Thanks in advance for any information and opinions.


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