When To Replace The Timing Belt On A 1999 Alfa Romeo 166 (2.4 JTD)

When it comes to servicing and maintenance on your Alfa Romeo, one of the most important considerations is timing belt replacement (aka ‘cam belt’)

Failure to replace the timing belt within the required interval – either distance or time – could result in catastrophic engine damage, and potentially a one-way trip to the scrap heap for your car.

On this page you’ll find convenient, accurate information on timing belt replacement for your 1999 Alfa Romeo 166 with the 2.4 JTD engine.

Official, Initially-Stated Timing Belt Intervals

When your car first released, the following was the recommended timing belt replacement information:

Timing Belt Replacement Interval (KM)116,000km
Timing Belt Replacement Interval (Miles)72,000mi
Timing Belt Replacement Time5 Years
Warning: Do NOT rely on this timing belt information that was provided at launch for your car.

However, over time it came to the attention of Alfa Romeo that timing belts were failing prematurely on the 1999 2.4 JTD engine, resulting in catastrophic engine failure and costs for owners and Alfa Romeo alike.

Therefore, timing belt intervals were changed to the following. You should not use the original interval, and instead rely on the following. If you are looking at buying a 1999 166 with the 2.4 JTD engine and it has been maintained using the original interval recommendations (listed above) you may need to factor in organising a new timing belt/cambelt sooner than expected – work this in to your price neogtiations!

Recommended Timing Belt Intervals

The new timing belt interval for the 1999 166 with the 2.4 JTD engine is as follows:

Timing Belt Replacement Interval (KM)77,000km
Timing Belt Replacement Interval (Miles)48,000mi
Timing Belt Replacement Time4 years recommended, 5 maximum

Don’t risk expensive engine damage that might result in your Alfa Romeo becoming a write off – change the timing belt/cambelt as per the recommended interval/time. If you have no evidence of a previous change, get this job done ASAP.

See also  When To Replace The Timing Belt On A 2008 Alfa Romeo 147 (1.9 JTDM 8V)

Timing Belt Replacement For 1999 166 With 2.4 JTD Engine – Notes

Here are some other considerations:

  • While replacing the timing belt, it’s often recommended to also replace the water pump, tensioners, and idler pulleys as these parts often have a similar lifespan to the timing belt. If they fail, they can cause significant damage to your engine. Instead of purchasing these components separately, consider a timing belt kit. These kits often include the timing belt, tensioner, idler pulley, and sometimes the water pump.
  • The water pump is often driven by the timing belt in many Alfa Romeo models. If the water pump seizes, it can break the timing belt, causing significant engine damage.
  • Replacing the timing belt on a 1999 166 (2.4 JTD) is a complicated task that often requires special tools and expertise. Unless you’re an experienced DIY mechanic, it might be best to have this job done by a professional.
  • Keep a record of when you replaced the timing belt, including the date and mileage. This information will be useful for planning future maintenance and for potential buyers if you decide to sell your car.
  • The timing belt synchronizes the rotation of the crankshaft and the camshaft(s) so that the engine’s valves open and close at the correct times. If the timing belt fails, it can cause the engine to stop running or, in worse cases, cause severe engine damage due to piston to valve contact. Although Alfa Romeo timing belt replacement is typically costly compared to other makes and models, the cost of NOT replacing your timing belt on your 1999 Alfa Romeo 166 with the 2.4 JTD engine could be significantly higher if failure occurs.
See also  When To Replace The Timing Belt On A 2003 Alfa Romeo GTV (2.0 TS)

If you have any questions, clarification requests or suggestions, please feel free to leave a comment below.


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