MajorVery commonEngine

Alfa Romeo 147: Twin Spark cam variator (phaser) rattle and cambelt-routing belt failures

Twin Spark cam variator (phaser) rattle and cambelt-routing belt failures is a very common engine fault on the Alfa Romeo 147 on the 2000–2010 cars, and we rate it major. Putting it right costs $600 to $1,600 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 8 documented faults on the Alfa Romeo 147.

Vehicle: Alfa Romeo 147
Engine: 2.0L
Years: 2000–2010
Fuel: petrol
System: Engine

This page covers the Alfa Romeo 147 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Alfa Romeo 147 faults8 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the CVT belt and pulleys or Timing belt yet. We would rather show none than show a picture of a different part.

What goes wrong

The 1.6/2.0 Twin Spark petrol engine uses an oil-pressure inlet-cam variator (phaser) that wears and rattles - a distinctive diesel-like top-end clatter on cold idle that subsides above roughly 1700 rpm. It typically appears from around 80,000-120,000 km and worsens if oil changes are stretched. Separately, the cambelt routing has a sharp bend between the tensioner and water pump that caused early belt failures, so Alfa halved the belt interval to about 5 years/60,000 km; a snapped belt on this interference engine wrecks valves. The variator is usually replaced together with a full timing-belt kit and water pump.

What you would notice

Diesel-like rattle or chatter from the top of the engine at cold idle
Rattle that quietens as revs rise past ~1700 rpm
Louder tapping when the engine is warm and oil pressure is low
Uneven idle or slight loss of smoothness

How to check it

Where to look. Top of the engine - variator on the inlet camshaft pulley behind the timing cover; timing belt on the accessory-drive end

Insist on a genuine cold start and listen at the cam-cover end for a diesel-like rattle that fades as revs climb - a clear sign the variator is worn.
Ask for a dated invoice for the last timing-belt/variator/water-pump service; on the Twin Spark the belt is due about every 5 years or 60,000 km and an overdue belt is a walk-away or heavy price adjustment.
Check the oil-change history, as neglected oil accelerates variator wear.

Parts involved: CVT belt and pulleys, Timing belt.

What it costs to put right

$600 to $1,600 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“When was the timing belt, tensioner, water pump and variator last replaced, and at what odometer?”
“Does it rattle from the top of the engine when started cold?”
“How often has the oil been changed?”

Now check the Alfa Romeo 147 you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in the sources below. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them.

Alfa Romeo 147 buyer questions

Is twin spark cam variator (phaser) rattle and cambelt-routing belt failures serious on a Alfa Romeo 147?

We rate it major and very common on the Alfa Romeo 147. The 1.6/2.0 Twin Spark petrol engine uses an oil-pressure inlet-cam variator (phaser) that wears and rattles - a distinctive diesel-like top-end clatter on cold idle that subsides above roughly 1700 rpm. It typically appears from around 80,000-120,000 km and worsens if oil changes are stretched. Separately, the cambelt routing has a sharp bend between the tensioner and water pump that caused early belt failures, so Alfa halved the belt interval to about 5 years/60,000 km; a snapped belt on this interference engine wrecks valves. The variator is usually replaced together with a full timing-belt kit and water pump.

How much does it cost to fix on a Alfa Romeo 147?

$600 to $1,600 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Alfa Romeo 147 years are affected?

Our research records this fault on the 2000–2010 Alfa Romeo 147. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Insist on a genuine cold start and listen at the cam-cover end for a diesel-like rattle that fades as revs climb - a clear sign the variator is worn. Ask for a dated invoice for the last timing-belt/variator/water-pump service; on the Twin Spark the belt is due about every 5 years or 60,000 km and an overdue belt is a walk-away or heavy price adjustment. Check the oil-change history, as neglected oil accelerates variator wear. Look here: Top of the engine - variator on the inlet camshaft pulley behind the timing cover; timing belt on the accessory-drive end