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Stainless steel doesn’t conduct heat as well as other steels. I believe it also has a higher rate of expansion than most steels and cast iron. This could potentially cause issues, i.e, possible seizures etc, if used for an i.c. engine cylinder?

So do I. Rigid frame, Dowty pneumatic telescopic front forks……..

If you make the heads out of cast iron also, you could machine a short taper on the top of the cylinder. A matching taper on the mating face of the head, then lap the two together, no gasket, seperate valve guides or seats needed either? I had a Velocette 500cc MSS in the late 60’s which had...

I’ve found for drilling or tapping hard materials, Swarfega hand cleaner or E45 skin cream works very well as a cutting lubricant. This with a slow speed and maintain pressure.

In the UK, have a look on “Frost Automotive Restoration” website. All types of paints, coatings, etc. many high temperature. Some quite expensive, but there’s just about everything you could possibly need, paints, powder coating kits, anodising kits, electroplating gear, etc. well worth a look...

Portable induction heaters are sold in the UK by “Machine Mart“.

Very nice Brian. Please don’t take this as criticism but, from a safety point of view, would it not be safer to clamp from only one side to hold the tool bit? Using two screws at 180 degrees apart could allow the tool bit to “Rock”, due to two opposing points of contact when tightened...

Chronos at Dunstable?

The cases also contain a lubricant which gets pumped around the system with the refrigerant, (To lubricate the pump). When you open up the system you will, over time, lose this, and will need to ‘Top’ up with a suitable oil. You can use a moisture separator/filter to catch this, but running a...

How about an old, small fridge/freezer compressor, the ‘canister‘ type? Virtually silent when running. You could control the output by using a ‘bleed’ valve to adjust engine speed? Doug.

I remember, many years ago, following a Commer lorry fitted with one of these engines, or similar along a back road around Cambridge. It had a broken exhaust. I only followed it for a couple of miles or so before I had the chance to overtake it. It gave me such a headache, worse than being in...

Many ”E” clips and Circlips are manufactured by ‘stamping’. This leaves one side with one square edge and one slightly rounded edge. If you fit the clip with the rounded edge towards the outside, then any load pushing against the ‘square’ side of the clip could cause the rounded edge to ride up...

Is it possible that the grooving tool for the piston ring grooves is the problem? If the tool has a ‘defect’, slight taper, etc, on the side that is cutting the lower face of the groove, but the upper face is ok, then as the piston descends, (suction), and ‘seals’ against the, (good), upper face...

Rolls Royce “Vulture” ‘X’ configuration, 24 cylinders based on two RR Peregrine engines using a common crankcase and shaft. Used on the Avro Manchester, later to become the Lancaster. Rare, only around 500 odd engines produced.

Honda‘s 6 cylinder race motorcycle engine from the 60’s? 250cc or 297cc (for the 350cc class)

Here’s a kit I bought some years ago, haven’t got around to using it yet. Bought, I think, from ”Chronos” in Dunstable.

This is the one I use on my Super 7. No problems at all with leaking. I would imagine it would be fairly easy to machine an end to fit a ’push’ type gun? p.s. This was not new when I acquired it 30-35 years ago. Doug.

Yes, trying to remove the ball from the bottom of a blind hole would be,’Interesting’, to say the least. But if the ‘cylinder’ was separate from the ‘valve block’, it would be a straight forward operation. Another possible advantage having a separate cylinder would be, you only have to replace...

To improve the surface finish of the pump bore, if the valve end was detachable, you could perhaps try ‘Ball sizing’ - ‘Ballizing’, whereby a correct size hardened ‘ball’ is forced through the bore to correct any taper, and improve the surface finish. Apparently to an almost mirror finish. With...

Some full size diesels used an exposed element glow plug mounted in the inlet manifold to heat the air in the manifold, rather than inside the cylinder itself. Could you perhaps fit a suitable ‘resistance wire’ element loop across / through the manifold close to the opening, insulated at one...