Cornwall
Austin Seven Club
creating
interest in Austin Sevens
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Cornwall
Austin Seven Club
creating
interest in Austin Sevens
|
|
Links to other Austin Seven
Last updated:
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Pressure Nose Feed ModificationI fitted a new nose cone to my pressure fed engine; this will allow for a starting handle to be remotely fitted, if the need arise. Most pressure fed engines just have the end blanked off thus preventing the use of a handle. However, having now fitted the very nice copy of the original Austin design which was supplied by Quarry engineering I found that I had a small problem with it. It all started because I could not start my car due to a flat battery. When I tried to use the starting handle, I found this was not possible, due to engine oil having filled all the cavity and preventing the shaft from moving in [hydraulic lock]. I could not engage the starting handle shaft into the crankshaft and so I had a new nose cone but could not use it! The original plan was to drill and tap the housing and fit a pipe and tap etc and thus removing the oil trapped, but having removed the nose cone, I found that this was not a good idea, due to location of the pipe and fitting. Also the aluminium wall of the casting was just too thin to accept the fitting [bearing in mind there is 60psi behind it]. A much better solution is to drill down through the starting handle and fit a M6 tapped hole at the end and a small cross drilled hole about 2.5" from the starting handle. This allows for a small bolt to be fitted in the end and thus preventing oil leaking out; this bolt can be removed and allow any oil to escape out through the front in to a waiting rag. This modification now has the added feature of locating the starting handle by using a bolt to hold it in place and has two benefits:
. This article, written by Mike Davies, originally appeared in CA7C Seven Focus in Apr 2008 p25.
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Copyright © 2009 Cornwall Austin Seven Club, M J Watts &
D A Castle
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