Suzuki Swift 1.2 K12M 2014-2024 DOHC Engine Overhaul Kit

Indian-built 1.2-litre K12M Swift. Early examples produced approximately 63 kW and 113 Nm, with later calibration revisions.

Later-generation K12M Swift rated around 61 kW and 113 Nm, available with manual or AMT transmission.

The same K12M engine family was widely used in the compact Suzuki sedan.

South African Ignis 1.2 models also use the K12M engine family.

K12M applications also appear in selected Splash models.

Check diameter, taper, scoring and out-of-round condition.

Inspect every journal and determine the correct bearing size.

Check flatness, cracks, valves, guides, seats and sealing surfaces.

Find out whether lubrication, overheating, compression loss or another fault caused the original damage.

1. Timing Chain, Guides & Tensioner

The K12M uses a timing chain rather than a conventional timing belt. That removes the normal scheduled cambelt replacement job, but it does not mean the timing system should be ignored forever.

On a high-mileage engine or one with an uncertain oil-service history, inspect the chain, guides, tensioner, sprockets and timing components for wear before rebuilding around them.

2. Valve Clearance - A K12M Detail That Should Not Be Ignored

The K12M uses a shimless tappet-style valve train and Suzuki specifically includes valve-clearance inspection in K12M maintenance schedules.

Excessive clearance can contribute to valve-train noise. Insufficient clearance can prevent a valve from seating correctly as the engine reaches operating temperature, potentially affecting compression and valve life.

3. PCV / Crankcase Ventilation

Suzuki specifically includes the PCV valve in K12M maintenance schedules. This small component controls crankcase ventilation and should not be forgotten during an overhaul.

A restricted or malfunctioning PCV system can contribute to poor running, increased crankcase pressure, oil leaks and oil-consumption complaints.

4. Oil Pump, Oil Strainer & Oil Pressure

New bearings will not survive if the lubrication problem that damaged the original bearings is still present.

Suzuki workshop diagnostics for the K12M specifically include incorrect oil viscosity, a restricted oil strainer, deteriorated oil-pump performance, oil-pump relief-valve wear and excessive internal clearances when investigating low oil pressure.

5. Cooling System & Previous Overheating

Overheating is one of the fastest ways to turn a serviceable aluminium engine into an expensive rebuild. If overheating contributed to this overhaul, replacing pistons and bearings without repairing the cooling fault solves nothing.

Inspect the water pump, thermostat, radiator, cooling fan operation, hoses, coolant pipes and all evidence of external or internal coolant loss.

6. Do Not Rebuild an Engine Just Because It Misfires

The K12M uses individual ignition coils and electronic multipoint fuel injection. A misfire or rough idle can be caused by ignition, injector, air-intake, PCV or mechanical problems.

Compression testing, leak-down testing and proper diagnosis should determine whether the fault is actually inside the engine before an otherwise serviceable engine is stripped.

• Confirm K12M engine code and VIN.
• Measure every cylinder bore.
• Measure crankshaft journals.
• Check crankshaft run-out and journal condition.
• Check piston-to-bore clearance.
• Check piston-ring end gaps.
• Check bearing oil clearances.
• Clean oil galleries thoroughly.
• Inspect oil pickup and oil pump.
• Inspect cylinder head for damage or distortion.
• Inspect valves, guides and seats.
• Check K12M valve clearances.
• Inspect the timing-chain system.

• Follow Suzuki workshop specifications.
• Follow the correct tightening sequences.
• Use correct bearing sizes.
• Use appropriate engine assembly lubricant.
• Keep gasket surfaces completely clean.
• Use sealant only where specified.
• Confirm correct camshaft and crankshaft timing.
• Confirm free engine rotation during assembly.
• Install oil seals carefully and correctly.
• Replace single-use fasteners where specified.

• Install a new oil filter.
• Fill with correct engine oil.
• Prime the lubrication system where applicable.
• Fill and bleed the cooling system correctly.
• Confirm PCV and breather operation.
• Check fuel, coolant and oil connections.
• Verify oil pressure immediately after start-up.
• Monitor coolant temperature carefully.
• Check for abnormal mechanical noise.
• Inspect for oil or coolant leaks.
• Recheck all fluid levels after initial operation.

We encourage engine-part selection using the actual engine code and VIN rather than relying only on the vehicle badge.

Timing, lubrication, cooling, ignition, service and related components can be sourced alongside the overhaul kit.

Door-to-door delivery throughout South Africa.

South African automotive-parts experience backed by real fitment assistance.