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Cylinder head bolts

Submitted by william_pryde on Fri, 26/08/2011
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Heavy Twins

My ,53 Dommie no.7 has been partly restored and a copper cylinder head gasket fitted at some time, probably fairly recently. However only 2 of the front head bolts are fitted and there is a hole for a third just behind them. Should there be a bolt here on this model? If there should be and I insert one, does this mean I need to loosen them all and tighten them in the required order, or can I simply put the missing one in place without doing this? I have the tightening order in a later Dominator book.

Thanks

Submitted by gordon_johnston on Sat, 27/08/2011

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Yes, do fit the missing bolt. Make sure you get one the correct length - one of the specialist suppliers should be able to advise you. Without this bolt there is a possibility of the head gasket blowing between the cylinders. Assuming all is well with the bike, just add the missing bolt. I wouldn't disturb the rest, except to check that they are all done up to the appropriate torque - usually a modest grunt with a short spanner...

Submitted by michael_sullivan on Mon, 29/08/2011

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Probably a silly question but have you checked to see if the copper gasket has a hole in it where the missing bolt is supposed to be?

Submitted by william_pryde on Fri, 02/09/2011

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Previously wrote:

Probably a silly question but have you checked to see if the copper gasket has a hole in it where the missing bolt is supposed to be?

I haven't as yet but will do.

Thanks

 


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