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Author Topic: Massive Clattering Noise  (Read 19677 times)

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polilara

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Re: Massive Clattering Noise
« Reply #195 on: 25 May 2025, 19:34:25 »



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Dave G

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Re: Massive Clattering Noise
« Reply #196 on: 25 May 2025, 20:04:21 »

Thanks for that mate!

Really appreciate your photos.
Looks like I had the right idea, but not the right photos of my own.

 :y :y
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YZ250

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Re: Massive Clattering Noise
« Reply #197 on: 26 May 2025, 13:55:11 »

You’ve probably already done it by now but this may help. It’s in the workshop manual on Section 2C:12, or page 74 on the pdf.  :y  Did I send you a link to the workshop manual pdf?  :-\  If not, I’ll send you a link.  :y

[/url
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My fun car is a 2020 Bmw F32 430d M Sport with indicators.
My cruiser is an Audi A6 Avant S Line Black Edition with indicators.

Dave G

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Re: Massive Clattering Noise
« Reply #198 on: 26 May 2025, 14:04:12 »

Hi. No, not done it yet. Still cleaning up exhaust manifolds.
Link to the workshop manual would be brilliant. 

Thanks.
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YZ250

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Re: Massive Clattering Noise
« Reply #199 on: 26 May 2025, 14:11:41 »

Link sent.  :y
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My fun car is a 2020 Bmw F32 430d M Sport with indicators.
My cruiser is an Audi A6 Avant S Line Black Edition with indicators.

Dave G

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Re: Massive Clattering Noise
« Reply #200 on: Today at 15:03:00 »

Hi, a short update and a couple of questions, if I may.

Heads on, camshafts etc. installed, sprockets on and tensioner & idlers on. I've fitted the belt - right way round - and lined up the belt lines as accurately as I can with the the backplate and sprocket marks.

So this is a Y26SE, and the lower idler is not adjustable. The upper one was installed at 11 o'clock then moved to 9, and the tensioner is at 1.5mm above the reference mark. I've NOT turned the engine by two revolutions yet.

My concern is this: the double line mark on the belt does not align with the TDC notches on the engine and the crankshaft pulley, which is spot-on at 6 o'clock. The belt lines are a little up towards the tensioner.

So my questions are:
1. Should I be concerned about this given that everything else looks (to me anyway) to be correct? Even using the gauge on the 1/2 and 3/4 sprockets shows them bang on.
2. Does everything else look OK before I rotate the engine? In particular the 3/4 belt lines don't quite line up with the sprocket lines. If I were to move the belt to the left by one tooth, then it would be slightly out in the other direction.

A couple of pix will show where I'm at.



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Doctor Gollum

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Re: Massive Clattering Noise
« Reply #201 on: Today at 17:08:53 »

Look at the location of the belt marks relative to the teeth...

They're never going to line up with the pulley marks which are the marks that matter.

You're wasting all that work by not using the locking/timing kit though :-\
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Onanists always think outside the box.

Dave G

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Re: Massive Clattering Noise
« Reply #202 on: Today at 17:15:07 »

But I did use it…!

I took it off to take the photos more clearly.
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Nick W

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Re: Massive Clattering Noise
« Reply #203 on: Today at 17:25:48 »

My advice is simple:


the marks on the timing belt are a distraction, and aren't helpful even to position the belt initially.


Use a timing tool kit, and keep turning the engine through and adjusting the belt until all the marks on the tools line up every time.


Torque all of the relevant fasteners, and turn the engine through one more time.
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