Re: Alfa GT 1.9JTD Cambelt Change
Yes, change the waterpump. You can only change it by removing the cambelts, so I would do it while they are off.
The belt failures we've read about on the 16v JTD engine are almost all caused by a siezed waterpump, which has tried to stop the cambelt turning, causing it to snap and do a fair bit of damage. The 20v JTD also uses the same pump, so my advice would be to change the waterpump when you change the belts and tensioners on either the 16v or 20v diesel engine, just like you would change the variator if you were changing the belts on a Twin Spark.
FYI, the 8v and 10v JTD use a different pump which doesn't seem to have a reputation for failing.
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