YINAVAGAD 90738S Engine Timing Chain Kit Review: Complete Variable Valve Timing Solution for Ford and Lincoln 3.7L Engines

When your Ford or Lincoln’s 3.7L engine starts making that distinctive rattling noise at startup, you know you’re facing a timing chain issue—and ignoring it isn’t an option. After extensively evaluating the YINAVAGAD 90738S Engine Timing Chain Kit during several installation projects on different vehicle models, we’ve gained valuable insights into why this comprehensive kit has become a go-to solution for both professional mechanics and skilled DIY enthusiasts tackling this critical repair.

This isn’t just another timing chain replacement kit. The YINAVAGAD 90738S combines the essential timing components with Variable Valve Timing (VVT) solenoids and cam phasers—addressing the complete timing system in one package. Whether you’re working on a Ford F-150 pickup, a family-hauling Explorer, or a Lincoln MKX luxury crossover, this kit provides OE-quality components at a fraction of dealer pricing.

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What Makes This Timing Chain Kit Stand Out?

During our hands-on evaluation, we discovered that YINAVAGAD didn’t cut corners with their 90738S kit. The package includes everything needed to restore proper timing system operation, which is crucial given that the Ford/Lincoln 3.7L Duratec V6 engine has well-documented timing chain stretch issues, particularly in higher-mileage vehicles.

The kit addresses the complete timing chain system failure mode common to these engines. We’ve seen countless cases where replacing just the chain without addressing the VVT components or tensioners leads to premature failure and another expensive teardown within months. This comprehensive approach saves both time and money in the long run.

Complete Component List: Everything You Need in One Box

One of our biggest concerns when evaluating timing kits is whether they’re truly “complete” or if you’ll find yourself ordering additional parts mid-job. The YINAVAGAD 90738S impressed us with its thorough component selection:

Primary Timing Components

• Timing Chains (Left and Right Banks): Heavy-duty construction with reinforced links that exceed OE specifications
• Chain Guides: High-temperature resistant polymer construction designed to prevent premature wear
• Tensioners: Spring-loaded hydraulic tensioners that maintain proper chain tension across all RPM ranges
• Sprockets: Precision-machined gears with hardened teeth for extended durability

Variable Valve Timing System Components

• VVT Solenoids (OE# AT4Z6M280A): Both left and right bank solenoids included—critical components that frequently fail alongside timing chains
• Cam Phasers (OE# AT4Z6256A): Left and right cam phasers designed to restore proper valve timing adjustment capability
• Gaskets and Seals: Complete gasket set ensuring leak-free reassembly
• Hardware Kit: All necessary bolts, washers, and fasteners for complete installation

During our test installations, we appreciated not having to make emergency parts runs or wait for missing components. This kit truly contains everything required for a professional-grade timing system overhaul.

Compatible Vehicles: Will This Fit Your Ford or Lincoln?

We’ve personally verified fitment across multiple vehicle platforms equipped with the 3.7L Duratec V6 engine. This kit provides direct OE replacement for the following models:

Ford Applications

• Ford Edge (2011-2015)
• Ford Explorer (2011-2019)
• Ford F-150 (2011-2014)
• Ford Mustang (2011-2017)
• Ford Taurus (2010-2019)
• Ford Transit (2015-2019)

Lincoln Applications

• Lincoln MKX (2011-2015)
• Lincoln MKS (2010-2016)
• Lincoln MKZ (2010-2012)

The kit replaces OE part numbers AT4Z6256A (cam phaser) and AT4Z6M280A (VVT solenoid), ensuring direct compatibility. We verified dimensional accuracy against OEM components and found the fit to be precise with no modifications required during installation.

Why Your 3.7L Engine Needs This Timing Chain Kit

Through our research and real-world diagnostic work, we’ve identified the telltale signs that your Ford or Lincoln needs this timing chain service:

Common Symptoms We’ve Observed

Cold Start Rattling: The most common symptom—a loud rattling noise lasting 2-5 seconds during cold starts. This indicates timing chain stretch and worn tensioners allowing slack in the system.

Check Engine Light Codes: P0016, P0017, P0018, or P0019 codes indicating camshaft/crankshaft correlation errors. These codes point directly to timing chain stretch or VVT system failure.

Rough Idle and Poor Performance: Stretched timing chains cause valve timing to drift from specifications, resulting in rough idle, hesitation, and reduced power output. We’ve seen fuel economy drop by 15-20% in severely affected engines.

VVT System Failure: Failed cam phasers or solenoids prevent the engine from properly adjusting valve timing, causing drivability issues and triggering diagnostic codes.

Ignoring these symptoms leads to catastrophic engine damage. We’ve witnessed cases where severely stretched chains jumped timing, causing valve-to-piston contact and requiring complete engine replacement—a $8,000-$12,000 repair versus the preventative timing chain replacement.

Installation Experience: What We Learned From Hands-On Testing

We performed three complete installations using this kit on different vehicle platforms to evaluate real-world installation characteristics. Here’s what we discovered:

Skill Level and Time Requirements

This is an advanced repair requiring intermediate to expert mechanical skills. With proper tools and experience, expect 12-16 hours for complete installation including:

• Front engine disassembly (radiator, accessories, front cover removal)
• Timing chain removal and replacement
• Cam phaser replacement
• VVT solenoid installation
• Reassembly and timing verification

For first-time installers, budget 20-24 hours and invest in a quality service manual specific to your vehicle model. The Ford 3.7L requires precise timing alignment—mistakes result in bent valves and destroyed engines.

Required Special Tools

During our installations, we identified essential tools beyond standard hand tools:

• Cam holding tools (prevents camshaft rotation during phaser installation)
• Timing chain alignment tools
• Torque wrench (multiple torque specifications require precise tightening)
• Harmonic balancer puller/installer
• Front seal installation tool

Professional shops typically have these specialized tools, but DIY installers should factor in tool rental or purchase