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Return to Parts List Category : M- Oil & Chemicals MOR 35571 ENGINE BLOCK FILLER HELPS PREVENT CYL WALLS FROM CRACKING, & IMPROVES PISTON RING SEALING $29.99 Moroso engine block filler is designed to fill your block before the machining process. It helps prevent cylinder walls from cracking, and improves piston ring sealing by keeping the bore round. Just fill with water,mix and pour into block before machining Helps prevent thin cylinder walls from cracking and improves ring seal by keeping cylinders round Also dampens unwanted vibrations Has expansion rate very similar to cast-iron Highly regarded by “Mountain Motor” authority Scott Shafiroff Easy to follow, detailed instructions In an emergency, call the Poison Control Center. Seattle: (800) 222-1222 Denver: (303) 739-1123 Pittsburgh: (412) 681-6669