Is it more of a "Whirring " sound Rather than a squeal?

please, can you be more explicit?

|B

 

If it is "Whiring" then that is due to the cam belt being too tight, this will eventually wear the new water pump bearing and bearings.

A squeal could be a slipping auxiliary belt ,

B

 

Thanks, I will try and film a sample when I'm with the car, is intermittent so hard to catch sometimes :/
It is a fairly high pitched constant noise


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The car made the noise before and after cambelt change so assuming it may be a seperate issue?


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You mention "Idler pully " replaced did you mean the timing belt pullies?

Sometimes squealing occurs on the auxiliary belt tensioner pulley, and quite common, the squeal doesn't mean its not doing its job, but may need a little wd40 lube, if its too far gone then may need a replacement pulley , or a new tensioner

B

 

Thanks Brian h
Sorry yes meant cambelt tensioner pulley!
Any idea if this would also explain the high suction on the filler cap or is this not an issue ?


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That is a separate issue, I'm pretty sure, I wouldn't let it concern you too much, my wifes 1.8 vvti has something similar, and on releasing the oil filler cap revs alter, but all runs well with the car ??? who knows ??

 

My Z16XEP was squealing as well now and then (even when warm)... ended up to be the auxiliary belt.

 

My astra H also making squeaking noise from the cam belt cover, I had changed the timing belt, tensioner pulley and the adjuster , still not cure the noise . Pls any ideas of how to fix this problem....... Thank you

 

Chances are it the alternator belt, alternator it’s self or 1 of the idlers


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There’s not much else that can squeak other than the mount itself


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You mention the engine has excess vacuum,the squeal may be air getting sucked by the dipstick,
i've heard all sorts of noises from these engines once the pcv diaphragm has ruptured,
get the cover fixed first then see if the squeal is still there

 

Not sure if OP sorted this but same issue here with mine which I've just diagnosed as a faulty Diaphragm after the car showing p1071 and rather than just throw new sensors at it (Like it wanted me too ) as that's not how my brain works, I dug deeper and found out that if you let it get to temp and let the 'whistle' start....Then pull the dipstick and it (Whistle) should stop. Just about to change the Rocker Cover on mine over the next couple of days.

I did buy the Diaphragm on its own but read that some broke the housing when trying to remove and some said it can't be removed BUT have seen others remove and replace the Diaphragm without issue! So I bought a complete cover as well, will change the cover to keep car on road and then see if the Diaphragm can be changed on the broken OEM Cover.

One other symptom of the Diaphragm fault is that the car 'pinks' at about 2000 Revs because the engine is running too lean.

 

Have a look here. Not in English but the video is good.

 

Make sure you heat up the plastic lugs that hold the membrane with a hair drier , before easing them off.
Also the same thing when reassembling.

 

Will do, as that's one of the Videos I saw when reading up on it.

 

Hi all! First post on here and it's a problem! Have an Astra H 3door with the z16xep engine (1.6l, twin port)

The car has developed a squeal from around the cambelt side of the engine, squeal is intermittent and tends to occur once engine is warm, also there is a lot of suction on the dipstick/filler cap whilst engine is running

Have had cambelt , bearings, water pump and idler pulley replaced to cambat this with no effect?
Have heard it may be down to a dodgy cam cover?
Anyone else experience this or have any ideas ???! Thanks


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