Exhaust manifold bolt's snapped off

[smokebeer]

Hi guys I would like some advice on the best way to go about fixing
my problem. It's an old ntv 650 from 1996 the front exhaust manifold
had totally rusted away and when I went to remove the bolts they snapped right off. So my question is wtf do I do now and what would be the cheapest way to fix it I crashed my other bike and broke my hand so money is very tight and the bikes so old I love spending time on it just not money

pic of the issue

[stinkwheel]

Start soaking it with penetrating oil now.

Best way is to get someone with a welder to weld a nut to the stub and use that to wind it out. The heat of the weld will usually loosen it off. Do this first, don't fuck about with it, it's much easier when there's still a bit sticking out. Any other ways will probably land up with it breaking off lower still or being ground/drilled down so you have nothing to weld onto.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[WD Forte]

Agree
Drilling out can go horribly wrong some times if you go off axis.
(been there, done it, tee shirt etc)

I've removed umpteen broken studs using the welder technique
and had mostly good results.
____________________
bikers smell of wee

[smokebeer]

Hi chaps i think you are right maybe i can get a mobile mechanic to come around and try I'll only butcher it. I got some new studs & nuts but can't find a new collar the old one fell to bits.

[stinkwheel]

This ebay seller has a load of new old-stock motad exhaust fittings. maybe worth having a measure up and see if he has anything that'll fit?
https://www.ebay.co.uk/usr/exhausts2017-6
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[smokebeer]

Oh FFS paid a man to come around and remove the studs he got one out but snapped a hardened extractor off in the other stud and left me too it

[stinkwheel]

[Nobby the Bastard]

Brace yourself, that ones going in dry....
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[mattsprattuk]

+1 for "should never have even tried an extractor". Too many monkeys around who think they know stuff and end up making things worse by using the wrong tools.

It's not too late to weld a nut on. I've had success on ships capstans with 20 years of salt corrosion by doing that, then shocking the welded on nut with a hammer while you put torque on it.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[stinkwheel]

[WD Forte]

Extractors?
we aint got no extractors
we don need no extractors
we didn't tell you to use any stinkin extractors !!

https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fmedia4.giphy.com%2Fmedia%2F3oz8xMbKLAkRLHYNgI%2F200.gif%3Fcid%3D790b7611ple47b5uvnug1zhzesng0estqjx5pkaixz187bok%26rid%3D200.gif%26ct%3Dg&f=1&nofb=1
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bikers smell of wee

[smokebeer]

Yep he left me screwed I've seen used front block for around £100
but i think getting the head off is above my level of skill. There is nothing to weld onto now the bikes worthless to anyone but me and having wasted £150 on the job so far i can't justify taking it to a pro.

[WD Forte]

Show us a pic of the current state of it.
I expect we've all had to claw our way back from fuck ups
at times so pics may prompt ideas.

Where do you live? someone here may live not too far
or know someone in your area who may be actually useful
and make it better not worse.

I hope you didn't pay that guy to fuck it up

Putty to make a 'swallows nest' and Alum and moderate heat comes to mind.
never tried it myself tho'
Carbide or diamond tipped drill bits or dremel bits mebbe?
Collapse the fecker with a centre punch?

nil desperendum old boy
____________________
bikers smell of wee

[smokebeer]

I am in good old Bristol m8 its not been a good 3 months i haven't worked as i crashed my cb125f after work and broke my hand that's why i was playing around with the 650.I have started working now but the first day back i went into a shop and a car reversed into the CB.
I must have done something very bad in a past life Anyway i put the 650 back together but forgot to take a pic i just wanted to see how loud it was going to be if i needed to take it somewhere and the bracket i got needed to be cut down a bit and i wanted to get it sorted .Turns out i only needed to cut a bit of the length off and its thicker than the old one
but i was still able to get one stud in and a nut on and fairly tight.
Due to it being thicker metal i noticed it now hits a bracket that holds the radiator on and this seems to be just enough pressure that when i started it up it didn't sound any louder than before to me I think I'll take that as a sign to leave well enough alone its MOT is up next month i will wait and see if it gets through before i decide if its worthwhile fixing. The CB is playing up now and i need it to earn money so i have to get that done first these old people can't put themselves to bed you know

[stinkwheel]

Some extractors have flutes on them like a tap. If it's this sort, you might be able to get on it with a tap extractor which is like a tube spanner with tangs sticking out that fit into the flutes. The extractor itself should back out relatively easily if you can get any sort of a grip on it.

Alum does work. They routinely dissolve broken taps and drills out of complex alloy pneumatic valves. It's a relatively cheap and readily available chemical that dissolves steel but doesn't touch aluminium. It however does have to be strong, hot and in contact with the piece for a period of several hours.

Unless you have access to nitric acid? Dilute nitric will dissolve steel but not aluminium (unless you make it too dilute, when perveresely, it will dissolve both).
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[WD Forte]

[smokebeer]

[WD Forte]

TNR still going ?
There never seems to be anything happening when I pass there
Always done my own work and use Bikecare in St George for my MOTs
____________________
bikers smell of wee

[Robby]

You could still drill it with a solid carbide bit. Only issue is that they're very brittle and best used in a pillar drill. But for this job, where you don't need to cut deep, I would try it with a hand drill. It helps that they cut clean and fast, so you're not having to hold the same position for ages.

[sickpup]

650 Deauville heads are pretty much the same.

[smokebeer]

Hi fellas sorry I've been working everyday but wanted to thank you all for the advice it will be a few months before i can do anything with it.
I will keep my eye on ebay they have a few heads that might do the trick but its not a job i want to tackle in a muddy garden.

I remembered i had a video of it before i ruined it so made another of
after see what you think will it pass an MOT....place your bets lol
before
https://youtu.be/9LY0yVLQbHg
after
https://youtu.be/xhpLpy22Dfc