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Old 04-04-2011, 09:24 PM
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3400 3.4 torque specs

any one know the head bolts and rocker arm torque specs are for the 3.4 3400 02 impala i cant find any specs on line their is alot of cars but alot of them have different specs so far i have

head bolts 44 ft 95 past
rocker arms 14 ft

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Old 04-05-2011, 06:38 PM
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The cylinder head bolts require two steps to receive 44 ft-lbs of torque to join with the engine block. The large bolts joining the front plate and the engine block require 35 ft-lbs of torque and the small bolts joining them require 20 ft-lbs.The rocker arms are 14 ft lbs they didnt differ much with the engine as gm put that same motor in a number of cars and trucks...

Each engine is different. Different cylinder pressures in different engines dictate how much clamping force is necessary to hold the cylinder head in contact with the head gasket and engine block. Each cylinder bolts torque specification represents a part of the total amount of clamping force needed to overcome the pressures created by the combustion process in the cylinders. This means that the total amount of torque needed for each bolt is decided by dividing the number of bolts by the total amount of cylinder pressure that the combustion chambers produce. For an engine that produces 1,200 pounds of pressure and has 6 head bolts, each bolt would have to be torqued to at least 200 ft. lbs.
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Old 04-05-2011, 08:42 PM
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44 foot pounds and a 1/4 turn with a breaker bar.The 95 (95 degrees) requires a torque angle gauge and you can do this with a breaker going a 1/4 turn.
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