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3.4L Torque Specs

by Anne Davis

The 3.4L V6 engine is a member of General Motors' 60 degree V6 engine family that began in 1980. These engines were used in such vehicles as the Chevrolet Lumina in 1996, the Oldsmobile Silhouette from 1997 to 2004, the Pontiac Aztek from 2001 to 2005 and the Buick Randezvous from 2002 to 2006.

Engine Block

In the 3.4L V6, the crankshaft bolts to the engine block with 37 ft-lbs of torque. Both the crankshaft position sensor and the camshaft position sensor require eight ft-lbs of torque to attach to the engine block. 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 rear bolts of the oil pan require 20 ft-lbs and all other oil pan bolts require 8.08 ft-lbs of torque to attach to the engine block.


The connecting rod attaches to the crankshaft with 15 ft-lbs of torque delivered in two distinct steps. The flywheel-to-crankshaft bolts require 60 ft-lbs of torque. The engine's vibration damper or hub attaches to to the crankshaft with 79 ft-lbs of torque.

Other Specifications

The camshaft housing in this engine attaches to the cylinder head with 20 ft-lbs of torque. To prevent leaks, the oil pan drain plug should receive 18 ft-lbs of torque. The engine block-to-transaxle bolts require 55 ft-lbs of torque. The studs joining the exhaust manifold and the cylinder head receive 13 ft-lbs of torque. The bolts on 3.4L V6 engines manufactured in 1995 that join the exhaust manifold and the cylinder head require 18 ft-lbs of torque, and those manufactured after that year require 9.67 ft-lbs. The intake manifold nuts and bolts receive 30 ft-lbs of torque to attach to the cylinder head. The spark plug attaches to the cylinder head with 11 ft-lbs of torque.

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