2000 — 2002
2.5L 6G73 V6 (FWD)
Petrol
Test Drive Task: While cruising at a steady speed, gently rest your foot on the brake pedal to check for any pulsing or vibration. | Detail: Warpage of the front brake rotors is a common observation on these V6 models due to the vehicle's weight; keep an eye out for uneven feedback.
Check this by: Placing the transmission in 'Neutral' while parked, then shifting into 'Drive' and 'Reverse' while listening for a clunk. | Detail: The FWD drivetrain can sometimes exhibit driveline slop in older examples, so a smooth engagement is a sign of a well-maintained vehicle.
While driving: Find a quiet street, wind the windows down, and listen for a rhythmic clicking sound while performing a full-lock turn. | Detail: This is a classic way to inspect the CV joints for wear, which can occur on high-mileage front-wheel-drive sedans like the Diamante.
Check this by: Observing the exhaust smoke during a cold start, then again after a warm-up drive. | Detail: It is worth monitoring for excessive blue smoke, which might suggest valve stem seals are reaching the end of their service life in the 6G73 engine.
Usually marks the time to verify if the timing belt has been replaced, as this V6 is an interference engine.
Suspension components like struts and control arm bushings often reach a point where they benefit from a refresh for optimal comfort.
Cooling system hoses and radiator health become a priority to ensure the V6 runs at the correct temperature consistently.
Inspect the coolant reservoir to confirm the fluid is clean, which helps protect your cooling system from corrosion.
Check the engine oil level and color regularly to ensure the 6G73 V6 stays lubricated and happy.
Test the cabin air vents to ensure the climate control system switches modes smoothly without clicking sounds.
Have a look under the car for any signs of weeping oil near the transmission or engine sump.
Check that all electrical windows operate cleanly, as the regulators can appreciate a bit of silicone spray maintenance.
Estimated repair costs if issues arise
Future Budget Planning: Because the 6G73 engine relies on a timing belt, it is a key piece of maintenance. If you don't have proof of a recent change, you might eventually need to budget for this essential service to keep the engine running reliably.
Future Budget Planning: Over time, rubber bushings can harden or crack, affecting the smooth ride these cars are known for. Depending on the car's history, you might eventually need to budget for a suspension refresh to restore that 'luxury' feel.
Future Budget Planning: If the shifting starts to feel a little less crisp than usual, a professional transmission service can often make a world of difference. It is a proactive way to extend the life of the gearbox.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer