Though GM uses cork end seals, we typically spread a liberal bead of silicone across them instead. Gasket) are installed, build up the oil valley rails. Once the new intake gaskets (Fel-Pro or Mr.
The intake-manifold runners must be sealed tight, as a bad seal will suck oil into the combustion chamber, causing sluggish throttle response and poor fuel mileage. When all 16 are complete, fasten the valve covers and install the intake manifold. Repeat the process across the engine, lashing the opposite rocker (same cylinder) of the one at full lift. The idea is to preload the lifter plunger but not bottom it out. From there, tighten the rocker nut 1/2-turn and lock it in place with the jam nut. When it reaches full lift, tighten the exhaust rocker until the lifter plunger just begins to move. Turn the engine over several times via the starter or by hand until the intake lifter of the No. If it occurs closer to the rocker stud, the pushrod is too short-and visa versa if it is too long.
If the rub point is in the middle of the valve tip, the pushrod is the correct length. Remove the rocker arm and check out the valve tip. Mark one of the valve tips with a black Sharpie before the rocker is installed and spin the engine through several revolutions. At this point, it's also a good idea to check the pushrod length. Put the pushrods against the rocker cups. Then slide the pushrods through the cylinder-head holes and install the rocker arms. 443/.Lube the new lifters liberally and drop them back into their bores. Advertised Duration (Int/Exh): 280/290 Duration. LUNATI BareBones SBC Hydraulic Flat Tappet Cam & Lifter Kit - Chevrolet Small Block 280/290 Part Number: 10120101LK Previous Part Number: 10001LK Hydraulic Flat Tappet.
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