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Navigator crankcase problem

Submitted by john_braithwaite on Wed, 13/03/2019
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Light Twins

Hi, recently purchased a Navigator de luxe 1962 for restoration. Decided to fully strip and rebuild the engine and a few problems came to light; loose cylinder head nuts, fingertight camshaft nuts to name a couple, but my main problem is that the crankcase halves appear to have been sealed with blue loctite. My reasoning for this that they are impossible to separate with evidence of a blue compound at the joint. Any ideas anyone?

Cheers John Braithwaite

Submitted by nicholas_clarke on Wed, 13/03/2019

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John, there are several easy to miss Allen bolts on the lightweight crankcases so check carefully all the way round the casings.   The most likely two are in the right hand cylinder spigot bore (the hole in the crank case that the cylinder fits into) and can be hidden by oily residue.   Sometimes heating round the joint and main bearing housing can help break the grip of the old gasket goo - but resist the temptation to level the cases apart - too easy to damage them!     If you haven't got a copy of the Norton Maintenance Manual and Instruction book for the Jubilee and Navigator I strongly recommend you do - it will make your rebuild much easier!   Available from the NOC shop.   Good luck.  Nick    

Submitted by david_payne1 on Wed, 13/03/2019

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Hi John,

Having had the same problem as you when I first stripped down the Navigator I bought I thought the attached picture may help.  The timing cover gasket can hide the two bolts.

Dave.

 

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Hidden fixings.JPG

Submitted by nicholas_clarke on Thu, 14/03/2019

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Hi John,

Dave's picture shows you the two bolts in the timing chest, I have attached a picture of the two I was referring to.  Hope it helps.

Nick

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Hidden bolts.png

Hi Nick, thanks for the quick response, I had spotted these two bolts but not the ones Dave referred to, Sorted now,

As a newby to this forum I am very impressed with the quick and positive responses from Dave and yourself, Thanks again. John.

Submitted by nicholas_clarke on Fri, 15/03/2019

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A pleasure John, life with a lightweight Norton comes with it's challenges but its worth it - they have a special charm....eventually!  Nick 

 



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