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CRANK CASE HALVES BOLTS - WHAT GRADE?

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RGH
100Club
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Posts: 453
Joined: 16th May 2009
Location: Mandurah Western Australia

CRANK CASE HALVES BOLTS - WHAT GRADE?

#1 PostAuthor: RGH » Tue Mar 20, 2012 1:24 pm

Split my Z1B engine cases to replace noisy clutch hub springs, snapped one 8mm (outer) and two 6mm bolts. All good I thought, as plenty spare originals in the bolt box, went to reassemble, bugger, no where near tension, only firm, snapped 8mm inside bolt- position no 1 (which was same bolt as taken out). So I better replace all with newies. What grade are these or do you guys recommend to use?

Thankz in advance.
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RGH
100Club
100Club
Posts: 453
Joined: 16th May 2009
Location: Mandurah Western Australia

#2 PostAuthor: RGH » Tue Mar 20, 2012 1:27 pm

To get the broken piece out, just had to tap lightly with centre punch, so no way was it over tightened.
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RGH
100Club
100Club
Posts: 453
Joined: 16th May 2009
Location: Mandurah Western Australia

#3 PostAuthor: RGH » Tue Mar 20, 2012 3:53 pm

problem now solved, tensioned up all my original bolts on some A4 cases and all held up, mustta had one dickie bolt.
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