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Upper Rocker

rocker arm torque specs 98 chevy venture?

putting a 3400 chevy venture engine in a oldsmobile silhouette (both 98). Changed the lower and upper intake gaskets and don't have the specs for tightening the rocker arms. I think its 14 Nm (124 in. lbs.) plus 30* but not sure. v6 3400 LA1 engine

I have 2 good sources of information on the innards of the GM 60 degree V6.

First try the 60 Degree V6 forum. First link

Second try the auto zone website. They have an excellent Do It Yourself section. Here you will have access to the service manuals for your vehicle. In this case you may want to use the service manual for the vehicle where this engine originally came from. You can not download the manuals. However you can print any pages you need. You must register to access the manuals. However I have never received any SPAM by registering. See second link

I currently own 2 cars with the GM 60 degree V6. I've had the cylinder heads of of one and changed the lower intake manifold gaskets on the other.

Some friendly advice.

Be very careful with the torque specks on the intake manifolds. Torque them too much and they will crack. Torque them too little and they will leak. Torque the vertical bolts going into the engine block first. Then torque the bolts going at an angle into the cylinder heads. Start all of the bolts finger tight before you start torquing them to specifications.

Also, be very careful installing the push rods. They are different lengths and are very easy to get them installed in the wrong locations.

Pushrods are valve specific on all Gen 2 and newer pushrod motors. The following are when you are standing in front of the radiator, looking at the engine.

In a FWD configuration the order for the rear head from left to right is Exhaust, Intake, Exhaust, Intake, Intake, Exhaust. The front head from left to right is Exhaust, Intake, Exhaust, Intake, Intake, Exhaust.

Gen 3 3100/3400/3500 engines use a 5.750" Intake pushrod and a 6.075" Exhaust pushrod