How does a clamshell Cam core assembly work?
How does a clamshell Cam core assembly work?
The clamshell design utilizes aluminum split clamshell bearings that bolts together on the core itself. This allows you to increase the diameter of the core as well as the lobes by the bearing thickness. The clamshell cam core assembly is installed into the block and locked in place through the lifter valley.
Why do I need to move the camshaft lobe?
The newer aftermarket blocks with generous lifter bosses allow the lifter bores to be moved so that the pushrod will clear the intake ports. But, if you move the lifter bore, you must also relocate the camshaft lobe. When you start moving cam lobes around you quickly run out of room.
What kind of bearings do Jesel camshafts use?
Jesel’s Babbitt camshaft bearings incorporate a lead based alloy babbit material that is applied to a precision centerless ground seamless steel back.
What kind of lubricant to use on a cam core?
This Babbitt material, in conjunction with a dry-film polymer lubricant, protects the bearing surface from damage due to instances such as cold starts, low oil flow and catastrophic loss of oil pressure.
What’s the proper way to install a camshaft?
Assemble the timing chain and cam sprocket while aligning the timing marks properly, and torque the cam sprocket bolt or bolts to the proper specifications. Next, lubricate and install the lifters, always using a new set of lifters, for proper tappet-to-cam-lobe contact (Fig. 2).
Can a camshaft be removed from an engine?
Though using a camshaft removal tool is ideal, if your budget is tight you can work the cam out of the engine block by twisting it slowly and carefully, taking precaution not to scratch or gall the bearings. If you want to change the timing wheel, chain, or any other components in the assembly, you’ll also want to remove these, correspondingly.
Do you need oil conditioner for a camshaft?
Cam lobes and bearings need to be coated with oil conditioner, which is usually included with new part kits. Rotate the cam while it’s in the block, applying the oil in small amounts. Be careful to avoid scratching the cam bearings.
How does advancing or retarding a camshaft work?
Advancing or retarding the cam pushes the centerline of the camshaft to one side or the other of the crankshaft centerline. This changes the Timing of the valve opening and closing events, in relation to the position of the piston in the cylinder. How is it measured? Find the lobe centerline in relation to the piston’s position in the cylinder.
