Re:forged internals/pison slap?
 

every forged piston motor i have built sounded like that... it normally goes away after the first 1000~2000 ish miles

Re:forged internals/pison slap?
 

piston manufacturers usually recomend a specific bore diameter to account for the expansion of forged pistons once they heat up. This can create piston slap when cold. Although not all forged internal engines have piston slap. ;)

Re:forged internals/pison slap?
 

my dads old 1968 mercedes had one of those. I didnt know they still make them. His was on a diesel engine.

Re:forged internals/pison slap?
 

cars come stock with them up here, and if they don't, people pay up to 200 bucks to have one installed, infact there is many different kinds.

Re:forged internals/pison slap?
 

u dont really need a block heater if ur running 5w30

Re:forged internals/pison slap?
 

try starting your car in timmins when it's -50c out.