Rom 0 Posted September 27, 2006 Hi guys So i was cleaning up my manifold tonight, had a little look inside my TB, wasnt planning on doing anything today on it, just curious. This is what i found,is this replacable ? Or should i just source another TB ? Chris Share this post Link to post Share on other sites
boombang 2 Posted September 27, 2006 Shouldn't their be a screw in there? Reminds me of a guy who took a car somewhere and had the bottom end rebuilt as it was rattling away. On startup after rebuild it was exactly the same - on head removal there was a very small little screw in cylinder 3. Share this post Link to post Share on other sites
Rom 0 Posted September 27, 2006 Shouldn't their be a screw in there? Reminds me of a guy who took a car somewhere and had the bottom end rebuilt as it was rattling away. On startup after rebuild it was exactly the same - on head removal there was a very small little screw in cylinder 3. Yeah it should look exactly like the screw on the right ! Is on the throttle mech spindle, so allows play in the mech. Lucky i noticed now, rather than when i was almost ready to put it in Im guessing its going to be easier to get another TB, then replace the parts. Just wanted to ask. Chris Share this post Link to post Share on other sites
Jonmurgie 2 Posted September 27, 2006 Well it looks bust as well as a screw missing... not worth the risk so I'd locate another one if I were you Share this post Link to post Share on other sites
jonD6B 0 Posted September 27, 2006 I've got a good one that you can have for £10 plus postage if you want one. Share this post Link to post Share on other sites
Baz 421 Posted September 28, 2006 (edited) ooh!! So it's not rare then!! Mine was like this, made the throttle linkage awfully loose too, thats how i spotted it. Had to change the whole TB tho. Edited September 28, 2006 by BazGTMi Share this post Link to post Share on other sites
Baz 421 Posted September 28, 2006 Reminds me of a guy who took a car somewhere and had the bottom end rebuilt as it was rattling away. On startup after rebuild it was exactly the same - on head removal there was a very small little screw in cylinder 3. Oh bugger!! Mine has developed a little top end rattle since too, was hoping it's just a lazy lifter, hopefully cured when i do an oil change. Fingers crossed then eh!! Share this post Link to post Share on other sites
boombang 2 Posted September 28, 2006 This had been squashed flat, marked the piston and take a small amount of material out of the head - as his budget was very low (and just paid for a bottom end rebuild!) IIRC the head internals were cleaned up to remove and sharp edges that could cause excess heat + detonation and put back together. Worked absolutely fine and although not ideal for a race engine he got away with it! Its damn scary though and not fixable with lock-wire. I'll be lock-tighting mine in I think..= Share this post Link to post Share on other sites
Rom 0 Posted September 28, 2006 Should have said...this is an Mi TB, so if anyone has one knocking about... Share this post Link to post Share on other sites
Baz 421 Posted September 28, 2006 Should have said...this is an Mi TB, so if anyone has one knocking about... I've got a good one that you can have for £10 plus postage if you want one. Share this post Link to post Share on other sites
jim21070 2 Posted September 29, 2006 I reckon it's not beyond salvage you know, provided the TB bore and butterfly is undamaged. A little lathe work should be able to turn up a new shaft. As this now seems a common problem, along with air leaks on the butterfly shaft, it might well be worth an experiment. If anyone fancies sending me a duff (and sacrificial) TB, then I'll be more than happy to have a go at repairing it. PM me if interested... Share this post Link to post Share on other sites
