12 Rocker Arms Kit w/Bridges & Pivots for 1987-2006 Jeep Wrangler Cherokee 4.0L 242ci, Compatible with Cherokee XJ, Grand Cherokee ZJ WJ, Replacement for Engine Lifter Tick Noise Fix

What These Parts Are and What They DoFor Jeep 4.0L engine, the valvetrain uses a design with rocker arms, pivots, and bridges (instead of a single rocker shaft found on some other engines).Rocker Arms: These are levers. One end rests on the pushrod (which is pushed by the camshaft), and the other end presses down on the valve stem to open the valve. They "rock" back and forth, hence the name.Pivots: These are the fulcrum points on which the rocker arms rock. They are precisely machined to provide a smooth, pivoting surface.Bridges: Each bridge holds down two adjacent rocker arms and pivots. They are bolted down to the cylinder head, securing the entire assembly in place.In short: The pushrod pushes the rocker arm, which pivots on the pivot, and the other end pushes the valve open. The bridge holds it all down.Why You Would Buy This KitThe 4.0L engine is known for developing a loud "ticking" noise from the top end over time. This is almost always caused by wear on these components.Worn Pivots and Rockers: The pivoting surfaces wear down, creating excess clearance. This causes the famous "Jeep tick" or "lifter tick."Restoring Performance: Worn rocker arms don't open the valves as far or as quickly as they should, leading to a slight loss of power and efficiency.Preventative Maintenance: Replacing these worn parts restores proper valve operation, quiets the engine, and can improve performance and fuel economy.This kit provides everything you need to replace all 12 rocker arms, pivots, and bridges in one go.Critical Fitment Information & Important Considerationsyou must double-check compatibility for your specific vehicle.Fit For Jeep 4.0L (242ci): 1987-2006 - This is the primary application.⚠️ Very Important Note: When replacing these components, it is highly recommended to also replace the pushrods. Over time, pushrods can become slightly bent or the ends can wear. Installing new rockers on old, worn pushrods can lead to premature failure of your new parts and continued noise.SummaryThis is a complete valvetrain refurbishment kit for Jeep 4.0L inline-6 engine.You get: 12 Rocker Arms + 12 Pivots + 6 Bridges.It fixes: The common lifter tick / rocker arm noise.Replace OE/OEM Part Number：RK551-2,MRK5512,3223888It fits: Primarily For Jeep Wrangler (YJ, TJ), Cherokee (XJ), and Grand Cherokee (ZJ, WJ) with the 4.0L engine1991-2006.You should also consider: Replacing the pushrods and having a new cylinder head gasket set on hand for the job.

• 【Complete 12-Piece Kit - Fixes Ticking Noise】Get everything needed to quiet your engine: 12 Rocker Arms, 12 Pivots, and 6 Bridges. This complete set eliminates the common lifter tick and restores a smooth, quiet idle.
• 【Direct Fit - Replaces OE RK551-2, MRK5512】Ensures perfect compatibility by matching original specifications. Designed as a direct replacement for part numbers RK551-2, MRK5512, and 3223888 for a guaranteed fit.
• 【Durable & Reliable Performance】Built with quality materials for longevity and consistent operation. Helps restore proper valve function to maintain engine power and efficiency.
• 【Fits Jeep 4.0L & 4.2L Models】Compatible with 1987-2006 Jeep Wrangler, Cherokee, and Grand Cherokee with the 4.0L engine. Also fits 4.2L models. Confirm your model year for accuracy.
• 【Pro Tip: Replace Pushrods for Best Results】For a complete repair and to prevent future noise, we recommend installing new pushrods along with this kit. This ensures optimal performance and longevity.