How tight should intake manifold bolts be?
An oil leak may result if the vertical bolts are not tightened before the diagonal bolts on the lower intake manifold. Tighten the lower vertical intake manifold bolts to 115 inch-pounds (13 Nm), then tighten the lower diagonal intake manifold bolts to 115 inch-pounds (13 Nm).
How do you hold an intake gasket in place?
Registered. I use blue silicone to attach the intake gaskets to the heads and to make seals for the ends of the intake. Don’t use the cork gaskets that come with the gasket set. You might also try screwing three or four studs into the heads and using them to guide the intake into position.
Should you RTV intake gasket?
RTV, other sealants or adhesives should not be used around the coolant or intake ports on carrier-style gaskets. The only place RTV silicone may be required is to seal the area where the ends of the intake manifold gaskets mate with the end strip seals on the block under the intake manifold or valley cover.
Which side of manifold gasket goes head?
Exhaust manifold gaskets are another gasket type we get questions on. When installing Fel-Pro exhaust manifold gaskets, if there is a smooth, metallic side and a composite side, the metallic side should be installed facing out, meaning toward the exhaust manifold.
Do Fel-Pro head gaskets need sealant?
Fel-Pro head gaskets are also designed so that no additional sealers are needed. Modern facing materials and Fel-Pro’s proprietary coatings will compensate for minor surface imperfections, resist scrubbing, and provide the proper amount of torque retention to create a true no-retorque head gasket.
Do you need to torque intake manifold bolts?
Intake manifold bolts and head studs/bolts have to be torqued in a certain pattern and to a certain torque spec in order for your engine to work properly. Intake manifold bolts on SBC engines should be torqued to 30 lb-ft in a two-step sequence.
How do you torque an intake manifold bolt?
According to the Haynes manual, the sequence is to start on the drivers side at the rearmost outside bolt, then come to the front most inside bolt, then to the rearmost inside bolt, then zigzag your way back to the front. Tighten this side to spec before doing the other side.
Can I use silicone on intake manifold?
Yes some silicone is required. See below; NOTE: Prior to applying sealer, clean sealing surfaces of cylinder heads (6049) and lower intake manifold with Metal Surface Cleaner F4AZ-19A536-RA or equivalent to remove all residues that may interfere with the sealer’s ability to adhere.