Quote:
Originally Posted by tw0123
my 3400 does it when its cold... i talked to my neighbour, and he said its the piston slap from lack of lubrication during cold starts... and that it should go away once the engine is warm and fluids flowing properly... but if it doesnt go away, be sure to get it checked!!
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piston slap is caused by the pistons being slightly too small when theyre cold and they "slap" the cylinder, and expand when they warm. Lifter tick is caused by lack of lubrication during cold starts.