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dstc · Feb 11th, 2019, 13:12

Our D5 XC90 did the same for ages. It was only when we did a timing belt service that we found dried coolant crystals covering everything. It's really easy to pull the black plastic timing cover off to check, it's a single 10mm bolt and a handful of clips. Since you're in there check all of the tensioners and pulleys for dried bearings including the alternator pulley. Ours had a dried bearing on the plastic timing pulley. It sounded like a high pitched whistling sound, like a boost leak, but changed pitch with the RPM.

Amazon had the Aisin water pump for £45 a little while ago. It was identical to the genuine Volvo part we took off only the Volvo markings had been ground off. Hope you sort it soon.

Feb 11th, 2019, 13:12	#4
dstc Junior Member Last Online: Nov 28th, 2019 13:21 Join Date: Sep 2013 Location: London	Failed water pump seal, any dried coolant crystals? Our D5 XC90 did the same for ages. It was only when we did a timing belt service that we found dried coolant crystals covering everything. It's really easy to pull the black plastic timing cover off to check, it's a single 10mm bolt and a handful of clips. Since you're in there check all of the tensioners and pulleys for dried bearings including the alternator pulley. Ours had a dried bearing on the plastic timing pulley. It sounded like a high pitched whistling sound, like a boost leak, but changed pitch with the RPM. Amazon had the Aisin water pump for £45 a little while ago. It was identical to the genuine Volvo part we took off only the Volvo markings had been ground off. Hope you sort it soon.