12221-73G70 Suzuki K6A K6AT Crankshaft W/CNNECTING ROD For JDM Alto Every Jimny

The part number 12221-73G70 corresponds to a Genuine Suzuki Engine Crankshaft designed for the modern, all-aluminum Suzuki K6A (Naturally Aspirated) and K6AT (Turbocharged) 660cc 3-cylinder engine platform.

This crankshaft is the mechanical backbone of Suzuki’s second-generation 660cc Kei-class engines, transitioning away from the older iron-block F6A series.

🛠️ Engine Evolution Note: K6A vs. F6A

If you are ordering a replacement crankshaft for a vehicle from the transition years (late 1990s to early 2000s), it is critical to know your engine code:

• The F6A Crankshaft (12221-73G01): Fits the older cast-iron block, timing-belt-driven engine.

• The K6A Crankshaft (12221-73G70): Fits the newer all-aluminum block, timing-chain-driven 12V DOHC engine. These two crankshafts are completely different shapes and cannot be interchanged.

🚗 Vehicle & Chassis Compatibility Matrix

The K6A engine was incredibly versatile and stayed in production for over fifteen years. This crankshaft is a direct factory fit for a massive line of JDM (Japanese Domestic Market) vehicles built between 1998 and 2014+:

1. Suzuki Kei Trucks & VansSuzuki Carry & Every: Chassis codes DA52T, DB52T, DA62T, DA63T, DA65T, DA52V, DA62V, and DA64V.Mazda Scrum Equivalents: DG52T, DG62T, DG63T (rebadged platforms using identical Suzuki K6A internals).
   
2.  Suzuki Passenger Cars & SUVsSuzuki Jimny (660cc): JB23W chassis (K6A Turbo models).Suzuki Cappuccino: Late-production EA21R variants (switched from F6A to K6A).Suzuki Alto / Alto Lapin / Twin: HA22S, HA23S, HA24S, HA25S frame lines.Suzuki Wagon R / Wagon R Plus / RR: MC21S, MC22S, MH21S, MH22S, MH23S models.  Suzuki Cervo / Kei / MR Wagon: Various multi-valve variations.
   
   Brand: Suzuki Genuine USED
   Part Number: 12221-73G70 (Alternative: 1222173G70 / 12221-73G70-000)
   Engine Application: K6A & K6AT (660cc, Inline-3, 12-Valve DOHC)
   Material: Forged High-Tensile Steel
   Net Weight~7.36 kg (Approx. 16.2 lbs)Standard Bearing Ref.
   Main Bearings: M660A / Rod Bearings: R660A (Standard Taiho Sizes)

🔧 Critical Installation & Rebuild Checklist

When dropping a new or refurbished 12221-73G70 crankshaft into a K6A block, keep these vital rebuild requirements in mind:

1. Verify Your Bearing Thickness: If you purchase a brand new aftermarket crank, it will arrive ground to STD (Standard) factory sizes. If you are prepping a used or machined crankshaft, measure the journals with a micrometer to check if you need 0.25mm or 0.50mm undersized main and rod bearings.

2. Thrust Washer Inspection: The K6A relies on specific thrust bearings to control the axial crankshaft endplay. Always install brand new thrust washers during a crankshaft swap. If endplay is outside factory specifications, the crankshaft will walk forward and backward, eating into the aluminum engine block.

3. Clean the Timing Chain Drive Gear: The crankshaft snout drives a highly precise timing chain sprocket. Ensure the woodruff key and keyway channel on the nose of the new crankshaft are perfectly smooth and completely free of burrs before pressing the lower timing sprocket into place.

4. Mandatory Seal Replacements: Never reuse oil seals during a bottom-end rebuild. Pick up a fresh Front Crank Seal (09283-32042 or variant) and Rear Main Crank Seal (09283-60005) to safeguard the engine against oil loss.