Plays with Motors
Join Date: Aug 2007
Location: Northern California
Re: Filling Block After machine work???
It won't be a problem to add the concrete now if you pulled the heads and leveled it out, not the ideal situation, but only on the most finicky thin wall SBC blocks have I seen it be a problem.
The mix is designed to expand at the same rate as the cast iron, it does to a certain extent but whether you fill before or after machine work the concrete still causes distortions that wouldn't be there if the block was not filled. They get worse as the block gets up to temp, but that's the trade-off for having a more stable bore - the hope is that the gains from eliminating cylinder wall flex and "maybe" helping the bottom end some outweighs the bad.
2011 335i M-Sport
2000 F-250 7.3L ( Sold )
1966 Mustang Fastback
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