Intake manifold (Cast Iron) is 30 ft/lbs with non-hardening sealer. Exhaust manifold 25 ft/lbs with anti-seize lubricant. Heads are 65 ft/lbs
Lower intake manifold bolt 115 in/lb. Upper intake manifold bolt 18 ft/.
Assuming this is a 4.3L engine, the upper intake manifold gasket would be between the upper intake manifold and the lower intake manifold.
Around 30ft lbs.
there is no lower intake gasket, only a front and rear gasket
Bstuff.com should have the info you are looking for.
10 ft lbs
The 1997 Buick LeSabre intake manifold bolt torque specifications is 45 pounds per square inch. The manifold bolts should be torqued in 15 pound intervals.
Click this link or paste it into your browser. The answer is here. http://www.f150online.com/forums/engine/152892-lower-intake-manifold-torque-specs.html
Cylinder heads require 33 ft #s & 90 degrees following... Lower intake is 115 inch #s. Mitchell On Demand states 44 lbft & 95 degrees for 1999-2003 Chevy Malibu cylinder head torque specs for V6 3.1L, lower intake manifold 62 inlb then 115 inlb tightening in a circular pattern starting from center.
lower intake is 115 in pounds upper is 18 ft pounds
There is no torque spec for the air filter --it sits in its housing which snaps open and closed.The intake manifold torque specs are 89 inch pounds (7.5 ft.lbs.), that is for both the upper and lower intake.
AnswerIf this is the V-6, then you must have a common problem...lower intake leaks coolant.The torque spec for the lower manifold is:First pass: 60 inch poundsSecond pass: 110 inch poundsLast (outer bolts only): 18 foot poundsUpper intake is a total 88 inch pounds in at least two steps.Randy