Raber's Tech Tips: Episode #3 - Triumph 1967 T120 Bonneville Pushrod Tube Seals

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  • เผยแพร่เมื่อ 24 ธ.ค. 2024

ความคิดเห็น • 26

  • @j.gordonleishman6401
    @j.gordonleishman6401 4 หลายเดือนก่อน

    Very helpful. Thanks!

  • @PavleBalenovic
    @PavleBalenovic 6 ปีที่แล้ว +1

    I remember how I entered into such the problem you described well. I had to reassemble all the top once again not really undrestanding what the reason for leak has been more because I trusted to "original" parts and sizes needed. The head hasn't been skimmed much except a bit but I even compared the other spare head . That all really took me too much time that was absolutelly not nice. Thanks Michael, for the explanation and quite useful video.

  • @TheFlyingRobert
    @TheFlyingRobert 4 ปีที่แล้ว +1

    Wonderfully explained process of fitting these!

  • @arthurpewty6624
    @arthurpewty6624 5 ปีที่แล้ว +2

    thank you. Learning more all the time..

  • @andyb3429
    @andyb3429 5 ปีที่แล้ว +2

    Well done, very helpful.

  • @michaelfreinberg8614
    @michaelfreinberg8614 5 ปีที่แล้ว +1

    Hi Mike,
    That was great help

  • @johndoogan3712
    @johndoogan3712 3 ปีที่แล้ว +1

    Hi, During my career, I encountered a 633cc 9 stud pre unit Triumph engine in a racing sidecar outfit which was fitted with the 500cc pre unit Tiger 🐯 100 💯 one piece crankshaft with the 80mm stroke (650cc stroke is 82mm). These crankshafts, although of identical appearance have a figure 5 stamped onto the timing side crank web which is the way to tell them apart. A check with another cylinder showed that that cylinder hasn't been decked. The owner decided to replace the crankshaft knowing he could get a good 😊 price for the 500cc item.
    The replacement crankshaft was sent off for balancing, sludge trap cleaned and journals measured which were still fine.

  • @michaelszczys8316
    @michaelszczys8316 4 ปีที่แล้ว +1

    My 900 year old seals are getting pretty tired, I have to do this and check out what size I need to get.

  • @kommando828
    @kommando828 7 ปีที่แล้ว +2

    If the thinnest seals are needed you should also check if the head has been skimmed, if it has then you need a thicker head gasket and to then restart the gap checking process to find the right thickness seals.

  • @michaelszczys8316
    @michaelszczys8316 4 ปีที่แล้ว +1

    You might have to break down and ‘ make ‘ you some custom length pushrod tubes

    • @michaelszczys8316
      @michaelszczys8316 4 ปีที่แล้ว

      Looks like you just made it with those skinny seals

  • @VndNvwYvvSvv
    @VndNvwYvvSvv 4 ปีที่แล้ว

    Finally a good example of how to do this, but how do you measure what to order in the first place? For some of us, it can get very expensive and take a very long time to get new parts.

    • @bonkeydollocks1879
      @bonkeydollocks1879 4 ปีที่แล้ว

      He Dosent know this by the look of it..

    • @rodfast8196
      @rodfast8196 3 ปีที่แล้ว

      Most gasket kits come with several sizes of those seals , round and flat.

  • @stuartosborne3013
    @stuartosborne3013 3 ปีที่แล้ว

    Don’t use silicon goo on the seal joints fit dry.
    I’ve used gas PTFE tape and it works great instead of the silicone stock ones when I didn’t have seals to hand for the top tube joint with a bit of well seal. Still leak free. The standard design bends the head and does encourage leakage across the two cylinders losing power out put.

  • @AskingForAFriend
    @AskingForAFriend 2 ปีที่แล้ว

    Do you use sealant on the pushrod tube seals? Or a dry installation?

  • @HermanMunster420
    @HermanMunster420 4 ปีที่แล้ว

    I'm a first time builder, I have a 72 T120 with a 63 cylinder head, what pushrod tubes and pushrods should I get?

  • @rayl9335
    @rayl9335 5 ปีที่แล้ว

    I use a thick o ring on bottom and thin one on top of tubes. Both are the white o rings. As stated it all depends on how much head rock you get. Any one use gasket sealer or install dry? I would think dry is OK.

  • @mickthemonkey
    @mickthemonkey 6 ปีที่แล้ว +1

    Wow. looks like the right amount? I don't doubt your expertise, but stick a feeler gauge in there & give us some kind of chance.

  • @bonkeydollocks1879
    @bonkeydollocks1879 4 ปีที่แล้ว

    OK shall we just guess the gap then because it's a bit hard to guage when in the bath watching this

  • @raybowman9425
    @raybowman9425 4 ปีที่แล้ว

    Sure that's not 750 head the depth for push Rod tube is different only owed triumph for 35 years

    • @bonkeydollocks1879
      @bonkeydollocks1879 4 ปีที่แล้ว +1

      I thought that but it's a 9 stud head by the look of it. I believe 750s had ten studs

    • @rickconstant6106
      @rickconstant6106 2 ปีที่แล้ว

      @@bonkeydollocks1879 correct. 750s also have a slightly different sealing arrangement for pushrod tubes - the top seal is an o-ring, and there is another o-ring in a groove machined into the bore at the bottom of the tube, as well as the flat silicone ring squashed underneath and retained by the "wedding band". Mine have always sealed ok with the standard set up (for a few years, anyway, until they don't)

    • @bonkeydollocks1879
      @bonkeydollocks1879 2 ปีที่แล้ว

      @@rickconstant6106 yes, I was doing it of memory, what makes it hard for me is mines got a morgo 750cc big bore kit, and a 750cc mick hemming big valve head, all on a 650cc engine so I'm all over the place