Meeze Posted February 18, 2020 Report Share Posted February 18, 2020 I need some advice as the heater valve on my GT6 MKII has 'snapped off' into the manifold. Any advice please would be helpful. What size spanner do I need for the banjo bolt. Many thanks Maria Link to comment Share on other sites More sharing options...
Clive Posted February 18, 2020 Report Share Posted February 18, 2020 I would avoid trying to undo the banjo bolt, it usually ends up in an expensive repair bill as the threads seem to destroy themselves. I would attempt to drill the broken piece out, slowly increasing the drill size until almost all the way done. Then see if the remains will unscrew... the heat from drilling helps I think. Link to comment Share on other sites More sharing options...
Meeze Posted February 18, 2020 Author Report Share Posted February 18, 2020 Thanks Clive. I have been advised via the banjo & through the top. For the moment, I have been smothering with 'plus gas'. What do you think of a stud extractor? Link to comment Share on other sites More sharing options...
Guest Posted February 18, 2020 Report Share Posted February 18, 2020 Clive, Is it possible to tap a thread in to that and then get an adapter to take a new heater valve ?? I'm not sure what the heater valve thread size is perhaps 5/8"unf, if so you could tap 3/8"bsp in to the break; there are plenty of these adaptors about with this combination if the suggestion is practical. Just a thought.. Regards. Richard. Link to comment Share on other sites More sharing options...
Clive Posted February 18, 2020 Report Share Posted February 18, 2020 Astud extractor will "probably" just spread the softish ali out and make it tighter? I can't remember if the thread on the valve is tapered, I have a feeling it is. Drilling to use an adaptor may work, but needs suitable taps etc. I would just drill it out, then see if it will untwist or use a pick to bend the remains inwards and grab with long nosed pliers. I have ruined 2 manifolds in my time, both by trying to undo the banjo bolt. Back then they were £10 or £15 with carbs at the autojumbles, and plentiful. Not the case any more. A specialist could get it off and repair the threads, but I would try my suggestion first. Link to comment Share on other sites More sharing options...
dougbgt6 Posted February 18, 2020 Report Share Posted February 18, 2020 M, The heater valve thread is BSP, you'll be needing a new heater valve. Here is a previous thread you might be interested in. Doug Link to comment Share on other sites More sharing options...
Meeze Posted February 18, 2020 Author Report Share Posted February 18, 2020 It is a tapered thread Link to comment Share on other sites More sharing options...
Guest Posted February 18, 2020 Report Share Posted February 18, 2020 10 minutes ago, Meeze said: It is a tapered thread Pity. Link to comment Share on other sites More sharing options...
dougbgt6 Posted February 18, 2020 Report Share Posted February 18, 2020 M, The heater valve thread into my banjo mechanism is BSP, the thread on my new heater valve was BSPT, tapered. It may be different on a mk2. Here is a previous thread detailing the trials and tribulations of fitting a new heater valve. My new valve is American and a different construction to the standard Triumph valve, MUCH smother and easier to operate. Link to comment Share on other sites More sharing options...
Meeze Posted February 19, 2020 Author Report Share Posted February 19, 2020 Thanks all for your input. I'm going to try going in from the top as Clive has suggested. I'll keep you posted! Thanks again Maria Link to comment Share on other sites More sharing options...
rlubikey Posted February 19, 2020 Report Share Posted February 19, 2020 Maria, my valve snapped off when I tried to remove it to change to that American heater valve that Doug mentioned. Mine was a TR6-style mounting (an extension out of the head) which is steel. I'm guessing the banjo mount you GT6 chappies have is aluminium? Anyway, I cut the inside of the valve stub in two places with a hacksaw blade ... very very carefully, so as no to graze the internal thread of the mount. Then I was able to squeeze the stub that was sticking out with a mole wrench and it unscrewed quite nicely. When you put the new valve in, use plumbers tape to seal the thread, lower the friction as you screw in, and reduce the possibility of corrosion stopping you remove the valve in another 50 years! Hope this helps, Richard Link to comment Share on other sites More sharing options...
Meeze Posted June 27, 2020 Author Report Share Posted June 27, 2020 Well, Tony, my husband, hack sawed down to the threads. He's got more patience than me! After four pieces had been removed, using my tweezers and my vacuum cleaner, which had to be emptied, we were happy that there was no more crud in the manifold. He then used PTFE tape and wound the new heater valve in. Job done! Link to comment Share on other sites More sharing options...
dougbgt6 Posted June 27, 2020 Report Share Posted June 27, 2020 Good job! Well done. Now your husband knows how the vacuum cleaner works time for some changes?!!! Doug Link to comment Share on other sites More sharing options...
Colin Lindsay Posted June 27, 2020 Report Share Posted June 27, 2020 32 minutes ago, dougbgt6 said: Good job! Well done. Now your husband knows how the vacuum cleaner works time for some changes?!!! Doug Be careful what you start, Doug.... Link to comment Share on other sites More sharing options...
Meeze Posted June 27, 2020 Author Report Share Posted June 27, 2020 Thanks Doug Can show him the ironing board next😂 Maria Link to comment Share on other sites More sharing options...
Colin Lindsay Posted June 27, 2020 Report Share Posted June 27, 2020 SEE? I rest my case, Your Worship. Link to comment Share on other sites More sharing options...
dougbgt6 Posted June 27, 2020 Report Share Posted June 27, 2020 Colin, It's no matter to me, I do my own vacuuming, ironing, bog cleaning. I'm happy to drop the rest of you in it! Doug Link to comment Share on other sites More sharing options...
Colin Lindsay Posted June 27, 2020 Report Share Posted June 27, 2020 1 hour ago, dougbgt6 said: Colin, It's no matter to me, I do my own vacuuming, ironing, bog cleaning. I'm happy to drop the rest of you in it! Doug Thanks. Now I have to do all of that on TOP of the gardening, painting, DIY and general modern slavery. I suppose I do the vacuuming and bog cleaning already, so it's only the ironing... Link to comment Share on other sites More sharing options...
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