Flat Tappet Camshafts
New Flat Tappet Lifters are ALWAYS required for flat tappet cams.
Used flat tappet lifters will have a wear pattern on the face. This wear pattern will prevent the lifter from spinning appropriately. It will cause heavy wear on both surfaces in a very short period of time.
The wear pattern on the camshaft and lifters starts during the Break-In Procedure. This is one reason why following the break-in procedure is so critical. Even if the cam and lifters only run for a short time, they are considered used.
Roller Camshafts
New Roller Lifters are not always required for roller cams.
If you are planning on reusing roller lifters, you should:
- Thoroughly clean and inspect each lifter.
- Be sure the needle bearings and axle are in good condition and roll smoothly.
- Check the lifter body and wheel for cracks, wear, and heat discoloration.
- Follow the Break-In Procedure appropriately.
Notes
Remember, you can't use roller lifters with a flat tappet cam. You can't use flat tappet lifters with a roller cam.