Author Topic: In dire need of divine inspiration  (Read 2622 times)

Offline Roadrocket649

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Re: In dire need of divine inspiration
« Reply #15 on: 20.04. 2011 17:39 »
Hi BSA-BIll

Good thoughts
I have screwed down the tappet so there was no clearance
Result: "Tap" still there
So I screwed down all the tappets so there were no clearances
Result: "Tap" still there

Looks like the Timing Chain cover and the inner cover will both have to come off

Cheers

Roadrocket649

Offline Jim

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Re: In dire need of divine inspiration
« Reply #16 on: 20.04. 2011 18:52 »
Hi Roadrocket 649

You say that the cam is new. I recently had a bottom end rebuilt with a new spitfire cam (not from SRM) and the cam lobes were not spaced properly meaning that one lobe was trying to lift two followers, I had to grind it back in the end. Could it be the edge of the cam lobe clipping something? *eek*
Wimbledon, England.
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Online bsa-bill

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Re: In dire need of divine inspiration
« Reply #17 on: 20.04. 2011 19:11 »
Quote
I have screwed down the tappet so there was no clearance

Not what I meant exactly, no take the adjuster out altogether so that the valve does not move, then if the click is still there it's definitely NOT the valve
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Online chaterlea25

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Re: In dire need of divine inspiration
« Reply #18 on: 21.04. 2011 00:57 »
Hi All
Jim may be onto something !!
If the camshaft gear is not fittd correctly and the gear is not fully home the cam can move inwards and catch on neighbouring followers *eek*

HTH
John O R
1961 Super Rocket
1963 RGS (ongoing)

Offline Roadrocket649

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Re: In dire need of divine inspiration
« Reply #19 on: 04.07. 2011 09:36 »
Hi Guys

Just an up date on the saga

Where I last left you, on the ever continuous story of the mysterious ?tap?, seemingly  from one of the valves, that occurred when I rotated the re-built engine over, either with kick start or in 4th gear & turning the back wheel

I had screwed down the tappets so they connected with the valve heads to eliminate excessive clearance some of the guys had suggested may have been the problem, and still had the mysterious tap ? so it was not the tappets and clearances ? I thought

Feeling positively dejected, and visualising the engine casings coming back off, I went down the pub, and consoled myself with a few beers.

Got up next morning, said try one last time and went and turned the engine over with the back wheel whilst in 4th gear ? tap still there

I thought I would just re-check the tappets were fully turned down, and found a bit of clearance on the LHS inlet valve ? screwed it down

The ?tap? was now only one in eight valve openings instead of one in 4

Checked again and found I could turn the RHS down very slightly
-   noise gone completely

I reset the tappets to correct clearance ? no noise!

Engine completed

It turned over 2nd kick, and runs beautifully ? sounds great!!!!!!!!!!!!

The engine re-build included a new camshaft, and new cam followers.

The toolmaker from the WSBSAOC that re-built the engine told me that he had had to grind the cam followers to get them to locate in their position. Whether this was part of the problem, or what I do not know

All I can say, is many thanks to all who helped me through this situation

Kindest Regards

Roadrocket649





Offline A10Boy

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Re: In dire need of divine inspiration
« Reply #20 on: 04.07. 2011 17:05 »
I love a happy ending. Well done.
Regards

Andy

1958 Super Rocket
Plus
1974 Kawasaki Z1a
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Offline Mosin

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Re: In dire need of divine inspiration
« Reply #21 on: 04.07. 2011 22:02 »
Now is the moment to try and store the memory of how good it feels when a problem is easily solved... Just so that you can remind yourself that not everything is always bad next time you strip a thread in an inaccessible place!  *smile* *smile* *smile*
1960 A7 Shooting Star
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North West England