Hi John,
Pistons have a "front" which is positioned to the front of the engine
block. It is usually marked with an arrow, or text stamped into the top of
the poston. That is in line with the wrist pin and aligns the underside
oiling.
Engine left is as you are sitting in the driver seat (left or right hand
drive).
Left as refered to in the manual is for the down side of the piston, or
left side of the piston. This is so the gap is not sitting where fuel or
oil might easily travel by gravity past the piston into the sump. If the
gaps are on the up side, then fuel and oil will sit on the ring ready for
the next start.
Glenn Merrell
President, TSC USA
Original Message:
-----------------
From: jon jonnyaxt@iinet.com
Date: Mon, 8 Jan 2007 15:57:38 -0800
To: buick-rover-v8@autox.team.net
Subject: piston rings
My Rover (published by Rover) engine manual says "Position oil control
expander ring joint
and ring rail gaps all at one side, between gudgeon pin and away from left
hand side of
piston - viewed from front of piston." I know that gudgeon pins are really
wrist pins, but
my pistons are round and don't have sides. I can't make any sense of this.
How do I
position the ring gaps -- oil control and compression? Jon
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