Engine Timing Chain Kit for Ford, Mazda & Mercury 4.0L V6, 1997-2011

Engine Timing Chain Kit for Select Ford, Mazda and Mercury 4.0L V6 Models

Multi-chain engine timing service kit for the specific Ford, Mazda, and Mercury 4.0L V6 applications listed below.

Critical fitment restriction: This kit is for 4.0L V6 engines only. Do not order by model and year alone. Confirm the engine displacement, engine code, VIN, original chain layout, sprocket tooth counts, sprocket bore sizes, chain link counts, tensioner design, guide shape, and reference number. The source does not state whether gaskets, seals, timing-cover hardware, camshaft bolts, crankshaft bolts, oil-pump components, or fluids are included.

Vehicle Compatibility

Ford — 4.0L V6 Only

• 1997–2010 Ford Explorer
• 2001–2003 Ford Explorer Sport
• 2001–2010 Ford Explorer Sport Trac
• 2005–2010 Ford Mustang
• 2001–2011 Ford Ranger

Mazda — 4.0L V6 Only

• 2001–2009 Mazda B4000

Mercury — 4.0L V6 Only

• 2003–2010 Mercury Mountaineer

The original title ended Ford fitment at 2010, but the available source lists the Ranger through 2011.

Confirmed Kit Components

• Two 78-link timing chains
• One 62-link rear jackshaft chain, crankshaft to jackshaft
• One rear chain tensioner
• One front chain tensioner
• One jackshaft tensioner
• One rear right sprocket — 25 teeth, 0.461 in bore
• One front left sprocket — 25 teeth, 0.572 in bore
• One front jackshaft sprocket — 20 teeth, 1.102 in bore
• One rear jackshaft sprocket — 20 teeth, 1.102 in bore
• One front chain guide rail
• One rear chain guide rail
• One jackshaft fixed guide rail

Contents warning: The source component list ends abruptly after the text “1x Bala” and does not identify the remaining item. Only the fully readable components above are confirmed. Review the product images and compare every required component before disassembly.

Reference Numbers

9-0389S, 90398S, TK8-20700, F77Z-6268-AB, TK428, KT4038S, TS20395F, 76117, 2L2Z-6K297-AA.

Reference numbers are provided for comparison. Confirm them together with the exact 4.0L V6 engine code, chain layout, chain lengths, sprocket specifications, guides, and tensioners.

Installation Notes

Timing-chain service is an advanced engine repair and professional installation is strongly recommended. Incorrect camshaft, jackshaft, balance-system, or crankshaft timing can cause severe engine damage. Follow the vehicle manufacturer’s procedure for locking and timing the engine, torque-to-yield fasteners, chain orientation, tensioner preparation, lubrication, sealant application, and initial start-up. Inspect the timing cover, oil passages, camshaft and crankshaft sprockets, guides, tensioners, related shafts, fasteners, gaskets, seals, and oil system before assembly. Rotate the engine by hand through the specified cycles and recheck all timing marks before starting.

Frequently Asked Questions

Will this fit engines other than the 4.0L V6?
No other engine is confirmed. The source specifies 4.0L V6 applications only.

Are gaskets and seals included?
The available source does not confirm gaskets, seals, timing-cover hardware, fluids, or other service items.

Is the component list complete?
The source text is truncated after “1x Bala.” Only the fully readable components listed above are confirmed.