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Joined: May 2021
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T
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T
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I have rebuilt this engine and run it but after a short while the smoke was coming out of the head,
I could not find a toque any where so I didn't tighten too much obviously not enough.
Any help would be welcome

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Q
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Originally Posted by PDF link
A persistent leak from the rockerbox/cylinder head joint can be permanently eliminated by
grinding both mating surfaces really flat on a piece of plate glass with fine grinding compound as
used for valves. Oil will leak down the 3/8" cylinder studs and out the head-barrel joint unless the
O-Ring seals under the washers are renewed whenever disturbed. torque the 3/8" cylinder head
nuts 25 foot-pounds evenly. Pull the 5/16" rockerbox bolts down only until they are firmly tight;
these fine threads strip out of the aluminum head rather easily if forced, but this catastrophe can
be repaired with a Helicoil insert.
pdf link
groveclassicmotorcycles.co.uk/Graphics/Home/velo-technical-instructions.

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Thanks great, I appreciate your feedback
Tim

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J
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+1 Quinten.
And Copper headgaskets should be annealed before assembly.


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