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Re: Oil feed/jets to the underside of pistons

To: ensgwo@bath.ac.uk
Subject: Re: Oil feed/jets to the underside of pistons
From: Transmancat@aol.com
Date: Mon, 21 Feb 2000 09:07:43 EST
Hi Geraint
My first question upon reading your mail was to ask "why". Do you perceive a 
problem with the standard lubrication system in that area of the engine?
In my humble opinion drilling holes in the con-rod is not a wise idea, the 
rod end is subject to a massive amount of load in the form of tensile and 
compressive stress, not to mention the temperature changes that they go 
through over the period of one engine cycle. Drilling into the main bearing 
area will not doubt reduce the oil pressure in that or those main bearings. 
The drop in pressure may in fact be marginal, depending upon the size of the 
hole, and could be compensated for by increasing the oil pressure throughout 
the system. 
I hope this helps.
Regards,
John J Black
(former Course Tutor for Vehicle Restoration, Colchester Institute of FE/HE)
www.waterloo-dtr.com

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