QUICK! Main baring clearance for 318

[Dr. Righteous]

Got a buddy that is building a '69 318.
What is the main bearing cleareance and the plus and minus tolerance? What is the correct rod bearing clearance?

And a bonus question..........
What should the top ring gap be when SpeedPro moly rings are used with KB silv-o-lites with a .030" overbore in that same 318?

[rumblefish360]

OK, in the how to rebuild my s/b mopar book......

main-----Not less than 0.001 in. or more than 0.003
stock piston gap---compresion, 0.010-0.020. oil gap--0.015-0.055.
Rod to rod clearance---0,006-0,014
Can't find the rod to main clearance. Sorry I can't help...I'll look in other books.

BRB

[rumblefish360]

The MoPar engines s/b book states;

rod side clearance___.009-.017
c-rod ____.0025-.0030
main_____..002-.003

Piston gap should be in the instrucktions, but I guess there not handy, so, the engines book states;

.014-,016 is good for the top ring and .004 less for the 2nd ring. Then it says, do not exceed a gap of .018 as this will allow to much blow by. (there rings made by who? They have KB pistons in stock, call MoPar tech @ 1.248.853.7290)

Hope I helped. Good luck!