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Parts for your 2007 Subaru Impreza-Timing belt kit
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2007 Subaru Impreza timing-belt-kit: what it does and when to replace it
For the 2007 Subaru Impreza, a timing-belt-kit is absolutely relevant. Technical references including the Subaru factory service manual for EJ-series engines, and parts catalogues from well-known suppliers like Gates, Dayco and Aisin, all specify a toothed timing belt (not a chain) on the 2007 Impreza’s EJ20/EJ25 petrol engines, including WRX variants. These sources also detail complete component kits for proper belt service, confirming this model is belt-driven.
The timing-belt-kit keeps the crankshaft and camshafts perfectly in step so valves and pistons move in sync. On most 2007 Impreza EJ engines, it’s an interference setup, so if the belt slips or breaks, valves can meet pistons — never a happy day. That’s why timely replacement, with all supporting parts, matters.
In Australia and New Zealand, it’s common practice to replace the timing-belt-kit at around 100,000 km or 5 years (whichever comes first), and earlier if the vehicle sees lots of heat, dust, short trips, or towing. Subaru service schedules for EJ engines support time-and-distance based renewal, technicians also recommend inspecting sooner if there’s oil contamination, coolant leaks, or noise from the front of the engine. Always confirm the exact interval for the engine code/VIN on hand.
A quality timing-belt-kit typically includes:
- Timing belt
- Hydraulic/automatic tensioner
- Idler pulleys
- Water pump and gasket (strongly recommended)
- Cam and crank seals, and often a thermostat
When servicing the 2007 Impreza, fitting the full kit rather than “belt only” avoids old bearings or a tired tensioner taking out a brand-new belt. Replacing the water pump while the belt is off is cost‑effective and avoids doing the job twice. After installation, correct belt tension, clean and oil‑free pulleys, fresh coolant compatible with Subaru alloy components, and a careful bleed of the cooling system all help the EJ engine stay happy for another long stint.
Warning signs that it’s time to act include belt squeal or whine, chirping or rumbling from the front of the engine, coolant weeping from the pump, oil around the timing covers, and any timing‑related fault codes or rough running. If there’s doubt, get it checked — on these engines, prevention is far cheaper than cure.
Popular questions about 2007 Subaru Impreza timing-belt-kit
How often should the timing-belt-kit be replaced on a 2007 Subaru Impreza?
Most workshops across Australia and New Zealand recommend every 100,000 km or 5 years, whichever comes first. If the car sees harsh conditions (heat, dust, lots of short trips), bring that forward. Always verify the interval for the exact EJ engine variant via the service manual or a trusted parts database.
What happens if the timing belt snaps on a 2007 Impreza?
Most EJ engines in this model year are interference designs. A broken belt can lead to valves contacting pistons, bending valves and potentially damaging heads. If the belt fails or jumps teeth, don’t try to restart — get it towed and inspected to avoid compounding the damage.
Should the water pump be changed with the timing-belt-kit?
Yes, it’s good practice. The pump sits behind the belt, so replacing it during the timing service saves duplicate labour and reduces the risk of a pump failure taking out a fresh belt. Refit with quality coolant and new gaskets for best results.
