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Rocker oilway drilling plug
https://www.ausmini.com/forums/viewtopic.php?f=2&t=80125		 Page 1 of 1
Author:  Mick [ Mon Jan 28, 2013 10:26 am ]
Post subject:  Rocker oilway drilling plug
I'm looking at pressing in a new set of bushes into my set of Cooper S rockers.

The question I have is to do with the oil drillings for the new bushes. There's two holes, one points forward through the rocker to direct oil onto the valve top, the other is directed backwards through to the adjuster screw to drain down onto the pushrod.

The front drilling is easy to drill, the rear requires me to remove a little bit of pressed in metal that was plugged at the factory after the drilling was completed. Can anyone tell me what I would replace this drilling plug with once I drill the new bushes?

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Author:  drmini in aust [ Mon Jan 28, 2013 10:31 am ]
Post subject: 
Use a solid aluminium rivet. Or, strike an arc.. ZAP!:wink:
Otherwise don't bother drilling. Later rockers (the sintered ones) have no oilway in there, or groove on the adjuster. There is enough oil fog to lube the pushrods without it.
Author:  Mick [ Mon Jan 28, 2013 11:20 am ]
Post subject: 
Cheers, Option B sounds good to me. I'll just give the rear one a miss.

I seem to remember seeing bushes with pre drilled holes one upon a time..

cheers

Mick
Author:  drmini in aust [ Mon Jan 28, 2013 11:22 am ]
Post subject: 
The alternative (if bushes still out) is pre-drill the rear hole in them and line it up when you press it in.
You do realise they need reaming after fitting..?
Correct shaft clearance is about .0005" (1/2 a thou).
Author:  Mick [ Mon Jan 28, 2013 11:32 am ]
Post subject: 
Thanks Doc, I did think about pre drilling, that would certainly do the trick as well.

Yes I've got a reamer for these ones.
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