Brazing Cast Iron
Turbo Mini Forums

I've managed to break through into the tappet chest whilst drilling a hole for a head stud plug. I should not have needed to plug the hole in the first place, but cocked up the original stud drilling.

Anyway, the hole for the plug goes into the water jacket and has also broken into the tappet chest. It is only a pin sized hole but would leak water into the sump.

I'm thinking of using braze/silver solder to plug the hole.

Has anyone had experience of brazing cast iron? Is it going to be possible to get it hot enough with my MAPP blowtorch or do I need something hotter.

The other option is to drill and tap it for a small plug.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

have brazed them with oxy acetaline, but not mapp.

when I did mine I stuck it in the oven to preheat it, brased it then let it cool slowly.

Im sure you oxy to braze.


Edit: What he said.

Edited by MikeRace on 24th Apr, 2008.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

I can use my blowlamp to get it hot over a large area and then use the Tig torch on a low setting to get it red hot local to the hole.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

i dont know much about it but when my mate repaired my dads plane (wood working, not jumbo jet) he heated it all up, welded it, and then buried it in sand to let it cool slowly

Well I think I've fixed it.

Fluxed it then warmed it up with the blowlamp and then used the Tig torch to get it to a dull red around the hole and then dropped in some silver solder.

Jobs a good un.

Except I've now broken a milling cutter in the new plug after fixing and milling it. Managed to get the plug out and put a new one in.

I'm afraid to doing anything else today in case I do some real damage.

I might just get back to where I started at 9:00am if i'm lucky.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Time to give the day up as a bad'un and head to the pub before you monumentally fuck up or bust something!!! LOL

I've just made myself a nice cup of tea.

Time to chill and work out how I'm going to do the job without the 2.5mm milling cutter that I'm not going to replace as it cost me £18.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Wooo everyone to pauls house

nowyoull spill the tea down your front ,scald your tessies,, and pull out a filling with the sticky cake .... go to bed oh ..happy birthday . :)

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Party at Paul S's! Put it on Facebook!

In the 13's at last!.. Just

spot it with a mig, job done! trust me

Hi,
Happy Birthday Paul :) Can you post me a slice of cake? lol
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

Come on lads, the cake is nearly all gone!

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."