Archive for October, 2012

Alloy welding… Done.

Posted: October 20, 2012 in Head

The head was returned from Radtec on Thursday afternoon. The head fillet plate will have to be set and then milled to create the flat face for the head closing plate to fit and seal against. The cam oil feel drilling has been welded up and will now require re-drilling on an angle to match the block. The oil return to sump galleries have also been filled. The head will now go to the machine shop to be skimmed and milled and then its final modifications will take place prior to rebuilding.

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While the head is away again for final machining, I have ordered new valve stem seals and these can then be fitted when its returned and completely cleaned again.

 

The block is still at the machine shop – hopefully it will be returned next week and the bottom end build can start!

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The block , crank and head have been loaded up to go for machining this week. The block will go to the machine shop we use at work. The head will go to Radtec for welding and then up to the machine shop to be milled and the head face skimmed to ensure flatness when mating to the block face.

www.radtec.co.uk – The place to go for alloy rads, intercoolers, bespoke fuel tanks, oil catch tanks and all other alloy fabrications. Speak to either of the Darrens or Keith and they will put you right! – +44 1543 502525

SC template.

Posted: October 7, 2012 in Uncategorized
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I thought id get a picture of the SC drilling template sat on the block showing the re-drilling positions that are required to match the head to the block.

Shown below.

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Some other jobs i have been getting on with was to clean up the gearbox ready to go to Guessworks for rebuilding. I would have done this myself but with the increased torque that will be produced by this engine, I would rather Guessworks build a gearbox that will be able to put the traction onto the road as best as possible and minimise the chances of any breakages.

Parts supply…

Posted: October 5, 2012 in Uncategorized
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A few bits arrived today.

 

4 x AE 21253 +060″ Slipper type pistons.

Cam bearing set

Core plugs

5 x Long head studs.

Mini Spares centre main strap kit.

The pistons will have to go away to SC to be machines for valve pockets this should be done in a couple of weeks. The centre main journal cap will also be machined by the engineering company to alloy the fitment of the steel strap. It is fitted to improve the strength of the centre cap as cranks have been known to flex slightly at higher RPM’s.

 

Plug It…

Posted: October 5, 2012 in Head

The 2 remaining cylinder head plugs have been made in the evenings this week. These are used to blank the original BMW head oil return to sump galleries. Next week the head will go off to Radtec to be have these inserts welded in and the timing chain area at the one side of the head blanked off allowing the SC conversion to run a dry belt setup. Below are the plugs manufactured from 19mm alloy bar. After welding the head will be skimmed flat to confirm a good seal on the A series block face. These inserts will then be drilled and tapped to 3/8BSP and angled unions fitted to allow the use of remote oil drain lines back to the the mini block via the now redundant mechanical fuel pump location.

Making bath tub shaped inserts by hand is not really the nicest of jobs around. Around 2 hours of test fitting, removing the plug then taking a little material at a time off until an acceptable fit was achieved.

Other small jobs completed this week have been to clear out the exhaust stud threads on the head, removing the exhaust gasket copper rings. Cleaning cleaning and more cleaning…