jono Posted July 21, 2018 Share Posted July 21, 2018 The ring gap placement differs for the EA82 pistons for 85/86 models to 87 in the factory manuals. Pistons do also Anyone know if the 87 position ing is an upgrade on earlier method or just to suit piston change? I can make options wlorse if I read a general instruction sheet I kept from EA81 build and they were followed using Volvo spec rings. Earlier tends to keep all gap placements below the centre line whereas the latter are all 30° off the centre line Quote Link to comment Share on other sites More sharing options...
subnz Posted July 21, 2018 Share Posted July 21, 2018 Looked at my Gregorys manual for EA82 and the diagram there, for piston ring gap position was similar to the second diagram (above) that you posted. ie the 2 compresion ring gap positions - both 30 degrees below centre line - left for top and right for second. and the 2 side rail gaps for oil ring at 30 degrees above centre line - left for top and right for bottom side rail. The top (1st) diagram that you posted are the ring gap positions for the EA81 according to Gregorys manual also Quote Link to comment Share on other sites More sharing options...
jono Posted July 21, 2018 Author Share Posted July 21, 2018 (edited) Thanks for the Gregory's input - totally forgot their opinion ! Looking at my factory manuals for Series One again the diagram with no gaps above centre line is in the ohv section. The ohc section has gaps above.the centre line and the diagram # in both books is the same L2-179 Fell for the old two engine models in the same manual trick The Series Two manual is XT specific so does not contain ohv stuff. Fortunately Fuji didn't do any ohv XTs. What a thought !! Edited July 21, 2018 by jono Quote Link to comment Share on other sites More sharing options...
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