The year, make, model and engine info would help.
Try Retightening intake manifold bolts first...............
remove the intake and exhaust manifolds. there are bolts that attach them onto the head and there are bolts near the carburetor that attach the intake manifold to the exhaust manifold.
Cylinder Head bolts 65 ft/lbs=Intake Manifold bolts 30 ft/lbs==Exhaust Manifold bolts 25 ft/lbs=
Remove the 1995 Oldsmobile Cutlass intake manifold retaining bolts. The manifold will come off. Remove the old gasket. Clean the surface. Put the new intake gasket and tighten the intake manifold retaining bolts.
Install the lower intake manifold to the engine. Apply sealer, GM P/N 1052080 or equivalent, to the lower intake manifold bolts.Install the lower intake manifold bolts. Tighten the bolts in three steps:TightenTighten the bolts on the first sequence to 8 N·m (71 lb in).Tighten the bolts on the second sequence to 12 N·m (106 lb in).Tighten the bolts on the final sequence to 15 N·m (11 lb ft).I this is what you are looking for.GMmechanic@gmail.com
The 350 cubic inch Chevrolet intake manifold bolts have a torque specification of Haiti pounds psi. The bolts should be torqued at 40 pound intervals.
Yes and and you are supposed to change the bolts holding the intake manifold also, so you do not strip the treads putting the bolts back on...old bolts are aluminum and wear easily need to throw away
Remove the intake manifold retaining bolts from your 1996 Chevy Astro Van. Remove the manifold gasket and clean the surface. Reverse the process to install the new intake manifold gasket.
# Upper intake manifold bolts 13 to 16 ft-lbs # Lower intake manifold bolts/nuts # Step One (ALL) 26 to 43 in-lbs # Step Two (BOLTS) 144 to 168 in-lbs # Step Three (NUTS) 17 to 30 ft-lbs
Intake bolts should be torqued to 35 ft lbs in the appropriate sequence. There should be 12 total "intake" bolts
24 ft lbs lower intake 115 inch lbs exhaust
Head bolts are 65 Ft. LBS Intake bolts are 35 Ft. LBS