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The torque specs are
-for intake manifold-to-cylinder head bolts/nuts
1996 and later-----132 in-lbs
-for intake manifold, upper to lower bolts
1995 and later-----89 in-lbs
-for cylinder head bolts
2001 and later----step 1--37
step 2--Turn an additional 120 degrees
I hope that this helps you out.
Upper intake manifold bolts : 89 in.lb. Lower intake manifold bolts : 89 in.lb. Thottle body bolts :89 in.lb. Front intake manifold support nut:89 in.lb. Upper intake support bracket nuts :53 in.lb. Reference:Service manualif you need further assistance please let me know and i will be glad to assist you further. If this has assisted you please feel free to rate the solution thanks -Midwest-tek
(step 1 ) the torque specs for the heads are---1998 through 2001 are 37 foot lbs. ( step 2) rotate an additional 90-degrees (1/4 turn). intake manifold bolts ( lower ) step 1-- 62 in-lbs, step 2--115 in-lbs. intake manifold bolts/studs ( upper ) 18 ft-lbs. this is for the 3.1 v-6, have a good day!
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