Quantcast

Search results

Help Support HMEM:

  1. R

    Engine Valves

    Before giving up completely, how about another head, maybe from brass, so no separate valve guides/ seats etc. OHV layout with a more conventional combustion chamber. Use the existing valve operating gear, longer pushrods with a rocker from each side to reach the valves? This should reduce the...
  2. R

    Engine Valves

    Hi, A couple of things, how wide are the seats in the head? If they are quite wide,do you think they may seal better if they were narrower? ( less surface area means spring strength gives more contact pressure). Do the valves have enough clearance in the guides? To allow them to float and seat...
  3. R

    What to charge to thread a rod

    I couldn’t say what to charge, most “jobs” I do are for friends, free of charge! How about asking the lady to provide you with one piece for you to thread to determine how easy/difficult the material is to machine. This should give you a rough idea of how long it will take, and how much to...
  4. R

    How do you seal joints?

    For this (Iveco fuel pump) application, imagine a round - I can’t remember the exact shape, flange with three fasteners arranged, not equally, but positioned as if there should be four but with one missing. The seal (“O ring”) never failed, the pump flange distorted on the unsupported side...
  5. R

    How do you seal joints?

    If you have reasonably wide flanges and don’t want to use gaskets, you could possibly try a shallow groove in one flange, (like an “o” ring groove) but not as deep. A small bead of sealant in the groove, which then shouldn’t extrude out everywhere but should seal ok. I’ve done this to good...
  6. R

    How do you seal joints?

    Happy new year everyone, I don’t know if this would work for you, Rover “K” series engines used a special sealer compound between the cylinder head and the camshaft carrier. It relied upon both surfaces to be machined. No gaskets so no chance of “creeping” between components. I’ve always found...
  7. R

    Engine Valves

    I seem to remember reading somewhere that the first Bristol sleeve valve engines were rejected by the Air Ministry because they didn’t meet the MINIMUM requirements for oil consumption!!! Bristol had to increase machining tolerances to use more oil. Apparently the boffins decided if an engine...
  8. R

    Engine Valves

    I think the main problem with full size versions of this type of valve is to do with unequal temperatures and expansion of valve and head causing sealing issues. With model engines ie the Condor, running on Methanol and castor oil, ( total loss oil, mixed with fuel), this is less of an issue...
  9. R

    Engine Valves

    Hi, Google “ Condor 120 model engine “. I had one in the early eighties, this engine was made by Dennis Allen of A. M. and Merco fame. It has a belt driven overhead rotary drum type valve incorporating both inlet and exhaust ports. The inlet entering from the side and the exhaust “ exhausting “...
  10. R

    Problems with Steel

    ‘Sweep’s fleece?
  11. R

    Problems with Steel

    Would ‘lard oil’ be used for skin cream? I think ‘e45’ is lanolin and paraffin based.Doug.
  12. R

    Problems with Steel

    A few years ago, before I retired, I had to repair a stripped thread in a mild steel bracket. Drilling out to the next size up, M10 x M12, the tap felt as though it would break, drilling to maximum tapping size, new tap, threading compound, oil, nothing made any difference. My friend, a...
  13. R

    tube pump

    Hi In the eighties I had a “Condor” 120 glow plug model rc engine, this had a peristaltic pump driven by a roller attached to the camshaft gear (ohc). This worked very well. Be aware though, silicone tubing does not like petrol / gasoline. Methanol is ok. Google “Condor 120” you should then see...
  14. R

    vacuum for use on a lathe

    How about something like a bathroom type extractor fan exhausting outside? Usually very quiet, reasonable priced and should be ok for removing just fumes. Doug.
  15. R

    Struggling to tap some stainless.

    Hi, I had the same problem a few years ago, a friend gave me a tub of his late mothers skin cream, E45 or something. I had tried everything, a larger drill, all types of tapping/cutting compounds, WD40, new taps, nothing worked. After dipping the tap in the cream the thread was cut with...
  16. R

    Help Please. Troubleshooting a New Webster

    hi gents My first time posting anything on here, just joined, Question, does this engine have a full size spark plug or a "model size" one? the ignition coil, is it a "full" 12volt unit or one which needs a ballast resistor? My reasons for asking are, a miniature type spark plug can be...
Top