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Author Topic: Crank Seal Inner Ring, How is It Sealed?  (Read 5933 times)

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polilara

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Crank Seal Inner Ring, How is It Sealed?
« on: 26 March 2025, 18:34:34 »
So inside crank seal was a ring as seen. I am just wondering how it is sealed to crank or sprocket. Engine oil can flow between crank and this ring so is somewhere a missing gasget or do I have to put sealant somewhere?

And

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Andy B

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Re: Crank Seal Inner Ring, How is It Sealed?
« Reply #1 on: 27 March 2025, 00:23:11 »
the outer diameter is sealed via the front crank lip seal .... the bore/inside diameter is sealed via the crank pulley being tight against the front face of the ring. You might want/need to turn it round so that the crank seal has a new bit of the ring to seal against it. no sealant required.  :y
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polilara

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Re: Crank Seal Inner Ring, How is It Sealed?
« Reply #2 on: 27 March 2025, 05:27:59 »
Thanks Andy B, I was afraid I'd lost spmething. Good idea to turn it. It is badly worn. I tyrn it if I can polish the other end, seem to be corroded. Perhaps I can find a spare, quite strange contruction.
Torque value for crank bolt was not mentioned in V6 list of maintenance part. Any idea. I have Heynes somewhere but did not find it yet.
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Andy B

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Re: Crank Seal Inner Ring, How is It Sealed?
« Reply #3 on: 27 March 2025, 07:56:24 »
Quote from: polilara on 27 March 2025, 05:27:59
Thanks Andy B, I was afraid I'd lost spmething. Good idea to turn it. It is badly worn. I tyrn it if I can polish the other end, seem to be corroded. Perhaps I can find a spare, quite strange contruction.
It should clean up OK with some fine emery cloth  :y

Quote from: polilara on 27 March 2025, 05:27:59
Torque value for crank bolt was not mentioned in V6 list of maintenance part. Any idea. I have Heynes somewhere but did not find it yet.
No idea I'm afraid, just know they're tight.
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polilara

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Re: Crank Seal Inner Ring, How is It Sealed?
« Reply #4 on: 27 March 2025, 08:06:00 »
Yes, that is whai I found, too, extremely tight.
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Andy B

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Re: Crank Seal Inner Ring, How is It Sealed?
« Reply #5 on: 27 March 2025, 08:12:02 »
Quote from: polilara on 27 March 2025, 08:06:00
Yes, that is whai I found, too, extremely tight.

generally described as 'FT'  ;) ;)
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YZ250

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Re: Crank Seal Inner Ring, How is It Sealed?
« Reply #6 on: 27 March 2025, 10:05:17 »
Quote from: polilara on 27 March 2025, 05:27:59
……
Torque value for crank bolt was not mentioned in V6 list of maintenance part. Any idea. I have Heynes somewhere but did not find it yet.

Crankshaft Sprocket Bolt according to Haynes manual:

Stage 1:  250 Nm
Stage 2:  Angle tighten a further 45 degrees
Stage 3:  Angle tighten a further 15 degrees

I have a link to the manual so I’ll try to send it to you so that you can check it for yourself.  :y



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polilara

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Re: Crank Seal Inner Ring, How is It Sealed?
« Reply #7 on: 27 March 2025, 15:24:55 »
Thanks, I check the link, too.
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