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May 26th, 2021, 11:13 AM   #11
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I Ride: Husaberg fs 650 2007
Sorry if you mount the head by tightening the bolts 1 at a time to the maximum tightening, don't you risk cracking the linar? If so, don't you create the same dangerous situation when you loosen the bolts 1 at a time? If you don't loosen the bolts a little bit at a time and all together here is what happens: you loosen the first bolt while the other three are at maximum tightening, loosen the second bolt and the remaining 2 are at maximum tightening, loosen the third bolt and you have 1 bolt tightened at maximum tightening which creates abnormal tension on the liner surface ...
Ps i love my husaberg ��

Last edited by Alfy; May 26th, 2021 at 11:18 AM.
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May 26th, 2021, 11:22 AM   #12
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Originally Posted by Alfy View Post
Taffy if you mount the head by tightening the bolts 1 at a time to the maximum tightening, don't you risk cracking the linar? If so, don't you create the same dangerous situation when you loosen the bolts 1 at a time? If you don't loosen the bolts a little bit at a time and all together here is what happens: you loosen the first bolt while the other three are at maximum tightening, loosen the second bolt and the remaining 2 are at maximum tightening, loosen the third bolt and you have 1 bolt tightened at maximum tightening which creates abnormal tension on the liner surface ...
Ps i love my husaberg ��
If this really was a problem a lot of `normal` users with little knowledge would be destroying their liners.
Also...shouldn´t it be listed somewhere in the Workshop Manual?

It only says:
Loosen the 4 cylinder head bolts crosswise and remove with the washers...

No offense.
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May 26th, 2021, 11:25 AM   #13
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Hi it sounds feasable Alfy.

fact is, the inside ledge is not perfectly flat in some engine crankcases. I've had a customer ask for money offf if he got an engineers report and shared it with me.

'fair enough' I thought. so he had an engineer look at it and I expected him to agree with me about my video but he didn't. The engineer said that the ledge has a very sharp 90d corner but there is a radius under the liner shoulder. the liner therefore can't get sll the flat part down on the ledge.

imagine one soup bowl inside another, they can rock and slide, they don't sit on the bottom oof the soup bowl underneath.

Let us remember also that 95% of the trouble has been with 450s from 2004.

Its nothing to do with head gaskets this one.

attached are ideas. I had a tool made that you drop into the top and if you see a rod below the round disc well in the hole in the rod goes a dial gause. the disc diameter is only 0.1mm smaller than the hole for the liner. .

Taffy
Attached Thumbnails
-sharp-edge.jpg   -liner-lifting-ring.jpg  

Last edited by Taffy; May 26th, 2021 at 11:29 AM.
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