update and new question

[Jonty Clark]

Hello Again.

Firstly a THANK YOU to CYKER & FLASH22 for your recent help regarding my petrol filling problem on my old Verso. The filler tube and breather pipe were both horribly corroded so I had them replaced.

Secondly: When I start the car on cold, damp mornings and switch the lights on I get a kind of quiet squealing noise. It's a little like a belt slipping. Alternator? But when my mechanic replaced the petrol pipe (above) I asked him to replace the belt at the same time. It's still making the same noise though. Any thoughts please?

Thank you

Jonty

[flash22]

The squeak is likely to be a bearing in either the alternator, water pump, idler or tensioner -you should be able to find it with a mechanics stethoscope

[Cyker]

The most common cause of cold-engine squeal in the Mk1 Yaris is by far the aux belt. If it goes away when the engine gets warm I suspect that is the culprit. You can also spray a bit of water/WD40 onto it to see if that makes it go away - If it does, definitely the cause.

If the mechanic used a cheap belt and/or didn't tension it properly it could still be the cause - A lot of the cheaper third-party belts use cheap rubber which are very prone to squealing.

I had that problem something chronic in my old 1.4 D4D and it was like a cat had been trapped in the engine it was squealing/screeching so loud! Took out the old belt and gave all the pulleys a good clean and fitted a new Toyota belt -  supplied by our very own PartsKing IIRC! - and it was fine ever since!

 

[bathtub tom]

2 hours ago, Cyker said:

You can also spray a bit of water/WD40 onto it to see if that makes it go away - If it does, definitely the cause.

I'd strongly advise you NOT to spray WD40 on it, it contains oil!

[Bernard Foy]

On 3/9/2022 at 7:35 PM, bathtub tom said:

I'd strongly advise you NOT to spray WD40 on it, it contains oil!

It might take away the squeal, but almost certainly will make the belt slip under load and acceleration.