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Engineering work in East Anglia

Home Forums Main Forum Engineering work in East Anglia

This topic contains 17 replies, has 6 voices, and was last updated by  John Allaway 2 weeks ago.

  • Author
    Posts
  • #6818

    John Allaway
    Participant

    I’ve just collected my T150V in bits. It’s a 1974 model (frame & engine numbers start JJ). The head is off and has one valve missing. It has clearly been knocking around in someone’s shed for many years but it looks generally OK.

     

    I will need to sort valves, guides and any thread repairs, as well as checking the head gasket face for flatness and putting it right if necessary.

     

    I have several questions, come to think of it!  Firstly, does anyone know of a trustworthy engineering workshop, preferably in East Anglia, which I can use to do head work?

     

    Are there any precautions I should take or things to look out for, when working on a Trident head? (with the twins, skimming the head to make it flat is cautioned against due to the effect on pushrod tube / seals crush – and a small amount of out-of-flatness is usually fixed when tightening-down).  Is the T150 head weak in any respects? Is out-of-flatness of, say, .008″ OK to ignore and expect to be taken out by bolt tightening?

    Is it best to find somewhere that can fit K liners to the guides, or is there a source of guides made of genuinely good material?

    Valves – best place to get from?

    Are there significant differences between heads from different years? I have a suspicion the head with my pile of bits may not be from the rest of the engine (it is a lot dirtier). It has some numbers stamped somewhere (can;t get to it just now to see what they are) – what numbers should I look for on a ’73/74 head, if there’s any difference between this and earlier ones?

    I think I;d better leave it at that for now – thanks in advance for any responses.

  • #6900

    John Allaway
    Participant

    Hello! Anyone out there?!

    • #6902

      John Allaway
      Participant

      Is there really nobody looking at this forum, who can give me any info on any of the points I’ve raised?

       

      Is this forum always so quiet?

       

      Finally, I paid to join the TR3OC a couple of weeks ago – shouldn’t I have received something in the post by now?

      • #6905
        David Lord
        David Lord
        Keymaster

        John, contact Dougy the Membership Sec on membership@tr3oc.com but please bear in mind all the committee members are volunteers, some have day jobs and they sometimes take holiday.

    • #6953

      Gary Westwater
      Participant

      One thing to look out for is making sure the studs in the barrels aren’t gummed up with muck. This can lead to the head bolts bottoming out early and then turning the stud in the barrel, stripping threads. Make sure you clean them out properly, maybe with a tap.

  • #6906
    David Lord
    David Lord
    Keymaster

    The head does need to be flat and sounds like it needs a skim.  If it has been skimmed multiple times before you may find you run out of valve adjustment, but you can buy extra thick copper rocker box gaskets.  A dry fit to check this and also push rod seal crush is recommended.  For reference the nominal head height is 2.875″.

    Take a look at the “Suppliers for Triples” section; there are a few good suppliers in there.

    • #6907

      John Allaway
      Participant

      That’s great David, thanks.  Predictably enough, the moment I post something wondering what’s happened to my membership, everything arrives the next morning!  So, thanks to whoever deals with this side of things. I;m looking forward to reading the to issues of Triple Echo.

  • #6910

    Martin Rawson
    Participant

    Hi you could try The Cylinder Head Shop, Louth.

    • #6911

      John Allaway
      Participant

      Are they still going? I’d heard they’d closed down a couple of years ago, but maybe that wasn’t right? The problem with websites is they never have dates, so maybe I’ll give them a ring.

       

      Are they as good as their blurb makes out?

  • #6919

    Martin Rawson
    Participant

    Hi John, I had a T150 head done by Len Paterson gas flowed, blended inlet, v/v guides K-Lined etc  and was really impressed. He has retired from the shop but does work from time to time. Last number I had 01507 328 590

    The bike pulls like a train!

    HTH

  • #6921

    andrew peterson
    Participant

    hi

    i think there is far too much focus on push rod tube seal crush, i have had my T160 since 1996 and was frightened off by all the talk about tens of thousands  crush. ive had  my head off several times, never measured anything just made sure its all perfectly clean before re assembly, never had a tunnel leak yet

  • #6922

    andrew peterson
    Participant

    im sure the factory never measured seal crush either , as the engines went past im sure they were just bolted up, no time to measure crush, just another thought

    good luck, it will all be worth it

     

    • #6948
      David Lord
      David Lord
      Keymaster

      Andrew, of course the factory had no need to measure push rod seal crush because they were assembling new components that were (at least in theory) designed to fit together properly.  It is worth considering measuring on a 40 year old machine though in case the barrel, the head and the rocker box surfaces have been previously skimmed, possibly several times, leaving everything undersized.  What’s more, many people strive to build their engines better than the factory, but it is entirely optional!

      David

  • #6946

    John Allaway
    Participant

    Thanks to everyone for your replies. It’ll be a while before I get round to the head I think. It looks undamaged but extremely grimy with burnt on oil, so it will need thorough and careful bead blasting.

    Anyone happen to be able to recommend anywhere that does a really excellent job of this? There are several people locally who do a decent job but parts still look as if they’ve been blasted, if you know what I mean.  Some people’s cases / heads etc seem to come back looking like newly cast aluminium, which is the finish I’d prefer, but no idea who can achieve this?

    The barrels will need doing too but they are nothing like as grimy.  I’ll get the rockerboxes doe too. But I will not contemplate having crankcases blasted!

  • #6950

    Gary Westwater
    Participant

    Hi John,

    The as new, or better than new, finish is probably that achieved by vapour (aqua) blasting. Usually available through a Google search of places in your area. I used that for my top end only, with all components fully stripped in advance.

    Attachments:
  • #6952
    Don Gray
    Don Gray
    Participant

    Hi John

    Firstly welcome to the club, you’ve done the right thing if you like Triples! I don’t know if you’re aware or if you do Facebook? We have a group there that’s quite lively & useful for posting up questions & getting good answers. As to recommending somewhere in East Anglia to help you, sorry I dunno…but I have had sterling service from 3D Motorcycles, run by a certain Mr Richard Darby. Based in the midlands I sent him my T150V head for an overhaul & was very pleased with the result. New guides & valves all sorted! He can do all sorts so he’s worth a call. I’d reiterate the previous comments about being worthwhile doing a dry run on head fitting to see what you’ve got clearance wise for pushrod tubes as in 40 years anything could’ve happened! Once you know then you can make a judgement on seals, cups, fibre washers, rocker box gasket material choice & thickness……oh & head gasket choice… Then you’ll have an oil tight engine. If you get anything blasted, I’ve seen lovely results of Aqua blasting. Castings look like new & it’s gentle, but naturally it’s imperative to thoroughly clean every tiny nook & cranny after! Good luck!

    • #6954

      Gary Westwater
      Participant

      I’d agree with Don about Richard Darby at 3D. I sent him my crankcase to have the oil-way bored out to T160 size and received a very quick turnaround. We are however blessed with a number of specialists, most of whom advertise in Triple Echo.

  • #6957

    John Allaway
    Participant

    This is very helpful, thanks Gary and Don.  Oddly enough, Gary, I was going to post a question next, asking if anyone can recommend an engineer to do the 3/8″ oil feed conversion!  I don;t mind driving to the Midlands for engineering work if I;m confident it will be top quality, and I’m more than confident in Richard Darby’s reputation. I’d want to take the stuff in person rather than post, as I like to explain things and have things explained to me, plus it’s interesting to meet people who know about such things.

     

    On the aqua-blasting, I need to do more research. I’ve had T140 items ‘vapour blasted’, which the chap who did it told me was the same thing. They looked good but they didn’t have that new look – slightly matt, just like bead blasting but finer.

     

    My T150 head is really crud-encrusted though, so it might need something a bit heavier to cut through it.

     

    Now to have a look at the ‘East Anglia Branch’ thread….

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