Parts for your 2019 Mitsubishi Asx-Harmonic balancers

2019 Mitsubishi ASX harmonic balancer — what it does and when to replace it

Yes, the 2019 Mitsubishi ASX is fitted with a harmonic balancer (also called a crankshaft damper). Technical references confirm this: the Mitsubishi Motors Service Manual for the 4B1-series engines used in ASX (2.0L 4B11 and, in some markets, 2.4L 4B12) specifies a crankshaft pulley with an integrated torsional damper. Mitsubishi’s ASA electronic parts catalogue also lists a “damper, crankshaft” for these engines, and major aftermarket catalogues (e.g., Dayco and Gates) carry dedicated harmonic balancers for 2010–2020 ASX/RVR/Outlander Sport models. So it’s definitely relevant on a 2019 ASX.

The harmonic balancer’s job is to soak up torsional vibrations from the crankshaft. It’s a two-piece pulley with a bonded rubber ring between the hub and the outer ring. That rubber lets the pulley cancel out crankshaft twist, keeping things smooth, protecting the timing set, bearings and accessories, and helping the serpentine belt track straight. When the balancer ages, the rubber can harden, crack or separate, and the outer ring can drift or wobble — that’s when you’ll feel extra vibration and risk tossing a belt.

There’s no fixed replacement interval in the factory schedule, instead, it should be inspected during regular servicing (a good rule of thumb is every 60,000–100,000 km or if any symptoms show up). If the balancer shows perishing, misalignment or wobble, it’s time to replace it. Best practice on a 2019 ASX is to:

• Use a quality, damped pulley — avoid “solid” underdrive versions that delete the rubber ring.
• Follow the workshop procedure: hold the pulley with the correct tool, fit a new crank bolt if specified, and tighten to the torque-and-angle spec from the manual.
• Fit a new drive belt if the old one shows glazing, cracking or contamination, and check the tensioner and idlers.
• Inspect the front crank seal and accessory alignment while you’re in there.

Common signs the ASX harmonic balancer needs attention include a belt that walks or chirps, visible rubber cracking or separation, engine vibration at idle or under light load, and timing marks that don’t stay steady with a timing light. If the balancer fails badly, the outer ring can shift, the belt can jump off, and you could suddenly lose charging, A/C and power steering — not ideal on Kiwi or Aussie roads. If there’s obvious wobble or a burning-rubber smell, park it and get it sorted before the next drive.

Popular questions

Does the 2019 ASX actually have a harmonic balancer?
Yes. The 2.0L 4B11 (and 2.4L 4B12 where fitted) uses a crankshaft pulley with an integrated torsional damper, as shown in Mitsubishi’s service literature and parts catalogue listings.

How long should the ASX harmonic balancer last?
Often the life of the engine, but our hot summers and age can harden the rubber. Have it checked every major service or around 60,000–100,000 km, and replace on any sign of cracking, wobble or belt misalignment.

Is it safe to drive with a failing balancer?
Short answer: risky. If the outer ring slips, the belt can come off and you could lose charging, power steering and cooling. If there’s wobble or noise, it’s safer to arrange a tow and fix it promptly.