MG08 water fitting thread size???

[mg34nz]

Anyone know what the thread size is for where the water hose fitting screws into the MG08 water jacket? I have a rusted up thread to try and clear and measuring the IMA supplied reproduction fitting is not helping as I think it may be undersized? comes out at 24 threads per inch and diameter is very odd at 18.6mm????? Any assistance greatly appreciated.

Thanks
Andrew

[IMBLITZVT]

I think all threads are Standard (Imperial to the rest of the world). So I think that 18.6mm might be 3/4 inch. I don't know off hand... but thats a guess.

[mg34nz]

I think all threads are Standard (Imperial to the rest of the world). So I think that 18.6mm might be 3/4 inch. I don't know off hand... but thats a guess.

I dont doubt that theory and Im sort of picking that the fitting is undersized as 3/4" is 19mm in metric terms but was hoping for some confirmation before I source a tap and clear the threads as the last thing I want to do is re-cut the thread in the water jacket the wrong size.maybe someone could measure the thread of an original fitting to determine the correct thread? Sorry but I dont have access to any originals.

Regards
Andrew

[alpencorps]

Hello Andrew,

attached the drawing / messurement from a original Conector and the threads from the gun.
The thread of IMA-Part match to the original very well.

[mg34nz]

Hello Andrew,

attached the drawing / messurement from a original Conector and the threads from the gun.
The thread of IMA-Part match to the original very well.

Thank you for confirming this this is quite an odd thread as I cant match it with any commercially produced taps and dies.I may have to make a special tool to clear the thread.....$$$$....

[crash520]

just have someone thread a piece of round to match then with a dremel or hack saw undercut across the thread in three or four places, will work fine to clear out the thread

[mg34nz]

Thanks crash,yes that will be the answer.

[alpencorps]

hello Andrew,

did yo have done the thread repair?

Had the same problem with my new 08 Semi Auto.

I found a screw tap for this work,
had to made a threaded bushing,
inside M19 x 1,0mm (match good to the Steamconector)
outside Diameter approx 19,3mm (without threads)

you have to dremel out the damaged original thread,
make a diameter 19,3mm.
Now soldering the bushing with a low temperatur solder.
Works easy and match very well.

if you need a bushing, let me know.

Greetings from Germany
Fritz

[mg34nz]

Hi Fritz,

Thank you for the advice on your thread repair, it sounds like a good solution. I did manage to clean the thread enough to get the water fitting to screw into it by following some of the above advice and putting a small cut into the male thread to help clear the female thread of rust.The fitting is now in place with a good coating of anti seize paste to ensure that it can be removed again in the future.

Regards
Andrew

[alpencorps]

Andrew,
on my gun, the threads are gone, realy damaged.
I understand, the threads of your gun are "only" rusty,
so its was not nececary to install a bushing.

greetings and a hapy new year
Fritz

[mg34nz]

Andrew,
on my gun, the threads are gone, realy damaged.
I understand, the threads of your gun are "only" rusty,
so its was not nececary to install a bushing.

greetings and a hapy new year
Fritz

Hi Fritz Yes just rusted from years of neglect,I was not able to even screw the fitting into the thread,I think I was fortunate to be able to clean the thread successfully otherwise it would have been a case of fitting an insert as you have done.
Happy 2013 to you also!

Regards
Andrew