This Chevrolet Performance 12740071 original equipment engine valve lifter automatically maintains zero valve lash preventing valve train noise and unnecessary wear and has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life.

12740071 supersedes 12698946, 12680871

FAQ:

Does a Chevy 5.3 have hydraulic lifters?

• Yes, the Chevy 5.3 engine utilizes hydraulic lifters, including the GM Genuine Parts Engine Valve Lifter 12698946.
• These lifters aid in smooth operation and adjust automatically to maintain optimal engine performance.

What is the difference between mechanical and hydraulic roller lifters?

• Mechanical lifters use a solid design, requiring periodic adjustment, while hydraulic lifters contain a hydraulic chamber, self-adjusting to valve clearance.
• The GM 12698946 lifter is a hydraulic roller lifter, offering quieter operation and reduced maintenance compared to mechanical variants.

How do I know if my hydraulic roller lifter is bad?

• Signs of a failing hydraulic lifter include engine misfires, ticking noises, reduced engine performance, or rough idling.
• The GM 12698946 lifter ensures smooth valve operation, but if experiencing issues, a diagnostic check by a professional is recommended.

Do hydraulic roller lifters need to be adjusted?

• No, hydraulic roller lifters, like the GM 12698946, do not require manual adjustment as they self-adjust to maintain proper valve clearance.
• Routine engine maintenance is essential, but adjusting these lifters isn't necessary due to their self-adjusting mechanism.