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JohnD

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Posts posted by JohnD

  1. On CT, people who knew Nuala, and her family, much better than I, are contacting Facebook to have her personal page "memorialised", so that it should be immune from further desecration.   But who knows, with Facebook?

    John

  2. It would take too long to search them all, so perhaps you should ask your own insurers?

    I find one that says, in respect of the exemption from MoT, "Our classic car insurance and classic motorcycle insurance policyholders are still required to keep their vehicles in a roadworthy condition without defects."  (https://www.abbeyfieldsinsurance.co.uk/blog/classic-vehicle-mot-requirements/ )  [My underline]

    If you are confident that you can do this without another, professional eye over the car, go ahead, make the insurers day!

    John

  3. 5 hours ago, Colin Lindsay said:

    Must be a very slim driver, to get out of the doors with so little room. :)

    Rest assured that given the driving standards I've just seen this morning - had to go on the footpath to get round a car parked on the centre white line outside the Primary School while the little dears were being tucked in behind their desks - if it was any wider they'd all be parking in there.

    Gosh, you too?  I have the same problem outside my nearest secondary school!    Because of a hump backed railway bridge, the road is double white centre-lined and has cycle ways in the gutters.  But the little darlings cannot walk more than    few yards to Mummy/Daddy's car, so they park all down the cycleways and over the bridge, both sides, forcing me on my bike into the face of oncoming juggernauts, which are likewise forced across the double white line!     The other day, I went down the line, walking my bike, pointing out that they were committing an offence, and asking them if they would please park further away.  Without exception, the reply was "I'm waiting for my child" to which my response was that they had my sympathy that they had a disabled child.    Several got quite angry.

    I've also complained, in writing to the Police.  No action, except an acknowledgement, after six weeks.   If they don't do something soon, well I suppose it's the MP?   The School bleats that they have told the parents, and that they have no jurisdiction over parking.

    John

  4. The whole 'remote' gear change extension, leaving a rectangular opening in the top of the box, with four studs, which I close to stop anything falling in!     A simple plate of thin steel is easy to make - don't forget the little locating studs need holes too!   The studs themselves are only partly threaded, so a set of four short tubes allows the original nuts to hold down the plate.

    An alternative would be to use  masking or gaffer tape!

    John

    • Thanks 1
  5. Even if the block originally had dome top pistons, it doesn't now (see original post).     It also has a Mk1 head which would match those pistons in terms of chamber size.   In effect a DPO has made up a Mk1 engine from parts!

    Tim Butler,  this discussion is turning into a beard pulling competition as minutiae of production are discussed, so to return to your original Q, yes, you can reassemble this bitsa engine and expect it to run!   But you found a leaking head gasket - the later GT6 engines had a groove machined in the block face around each bore and used a special head gasket with a 'fire-ring' that went into the groove.      If this groove is there in your later block, but you used an early style gasket, then I'm not surprised the gasket failed!       Refit the head with the later style gasket, it has a tab at the back, that may be marked "TOP".

    Good luck!

    JOhn

  6. The later GT6s had domed pistons because they were fitted with cylinder heads identical to those fitted to 2.5L engines!    The dome occupied extra space in the chamber to maintain the compression ratio, but made no difference to the swept volume.

    Vitesses never had this, so any 2L, but not 1600, head would be fine on your non-domed GT6 engine. 

    • Like 1
  7. Driving on ice!  When I lived in Stockholm in 1980, everyone (except me!) had two sets of wheels.  One for summer and a winter one with spiked tyres.   Was your ice driving on spikes, Roger?

    But this may not be for much longer!   The annual ski resort ice racing series, the Andros Trophy, will hold its last championship this winter.   Suitable iced circuits are too difficult to find!

    John

  8. Nicely arranged stands, Roger!

    The TDC gadget can be a true piston stop, or if the stud slides in the old plug body, may be scored at regular, small intervals and used as a 'piston rise indicator'.  But note that the piston has a few degrees of rest at the top of the stroke!

    John

  9. Dial gauges, and the necessary stands, are not cheap, and anyway, there isn't really room to mount them, unless you remove the head.      A metal plate bolted to the head may help, but that's more faff.   There is another way, that was never documented in Triumphs day!

    Think on "Equal lift on overlap".      At TDC No.1 firing stroke, No.6 should have  it's valves 'on the rock' and of course at equal lift, one coming up, one coming down.   So, if you lay a spirit level across the two valves, when the bubble indicates 'level' then they are at that point.

    This is slightly complicated by the engine being  mounted on a slight slant, nose up.   But a "Combination Rule" includes a protractor with a spirit level on the rule:

    image.thumb.png.bfee4fb41cfbcf86cf1e5523c0a80026.png

    Lay the rule on the edge of the head, and adjust the protractor so that the spirit level in the protractor is level.   Now lay the protractor edge across the valves and turn the engine clockwise towards TDC until the bubble indictaes level again, and your have found the ELoO point!

    image.png.3b9aa9c0942ede2559b9a0eaa2ec3ab4.png 

    This was taken with the head off and cam follower dummies in place, but demonstrates the method.

       Does this point coincide with TDC on your crank pulley?  If not, either A/ your cam timing is wrong, or B/ your crank pulley has shifted>

    Simples!

    John

  10. Petrol as an engine bay cleaner, with a wide area of the car soaked in it, a pool of it under the car and a bin full of petrol soaked rags,  and a high concentration of vapour in the surrounding air would be an enormous fire hazard!

    DO NOT USE PETROL IN THIS WAY!

    Gunk, or another engine  cleaner, would be much safer!

    John

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