It’s an Align bore, as you are machining the block to Align the bearings correctly, so I was told. And don’t grease you’re wheel nuts…
This is someone else that told me about align bores. A guy who rebuilt a Merlin Spitfire engine,in the very early ‘90’s. And no, it wasn’t Guy Martin, it was a wealthy customer who had part owner ship in a Spitfire aeroplane. He was the art director on the film Battle of Britain. He was a nice bloke, who collected scale model trains,built by the best model train builders of the world. I think he had 17 of them. The cheapest was around 60k, if I remember…
I also thought it was align bore until I had it beaten out of me. Makes more sense to me but I got fed up with being corrected.
https://www.coolairvw.co.uk/product/machinecase3/ UK & USA. Two nations divided by a common language.
A quick survey of VW machine shop websites here in Australia 1 for line bore 1 for align bore 2 for tunnel bore
So,,, do we need to have a poll to establish the only and most up to date and official LateBay terminology required to establish having all your holes in a line align? Or just ban both phrases completely ! Ozziedog,,,,,,,,,,THEN,,,,establishing something ridiculously swear filterrryy
It aligns the bores that are in a line in a tunnel. What it doesn't do is align the crank correctly in the case.
Why can't we all just live in a world of peace and harmony where all people are free to use their own personally preferred terminology without fear of recrimination and repression; where line bores and align bores can mix together in a joyful melting pot of love and random words, maaaan?
Surely it has to align the crank in the case, as it's the case that attaches to the gearbox and the crank and flywheel need to align square and central with the input shaft? Or does the end of the shaft and the clutch act as some sort of universal joint?
All a line bore does is increase the diameter of the hole that is already there. The boring bar (usually) uses the non wearing bores as a register and it doesn't correct any misalignment from the centre line that may have been there when the crankcase was originally machined.
