Who can braze?
Turbo Mini Forums

I've broken my cylinder head. trying to remove the by pass tube due to it being rotted off

but this happened



so need it brazing up

thanks
Stephen

Better off arc welding it with a cast iron stick imo but instead of welding that bit back on Id build up the area and redrill it

I seriously doubt it!

Thanks Paul I'm not fussed about having the bypass tube back in there i was gonna blank it off anyways

know anyone who could do that though?

I dont know anyone with an arc welder bur just look for a local welding shop

I seriously doubt it!

Cast iron is awful to weld, is the head anything special, if not it maybe easier to just find another.

its a 12g202 head i got for swopping a hif44 carb so don't owe me nothing but its best sort of head i can lay hands on for my 998. expect a 12g295 but price is outrageous these days

I would just find another TBH. The 202 is just a 1098 head with slightly bigger inlet valves than the 998.

Clean it back to shiny metal then MIG it up (normal mild steel wire). Weld for no more than 5 seconds at a time, then let it cool off just cold enough to touch (throw the broken piece away).

Don't use the pre-heat + slow cool method and don't braze either. Even if they work, you may warp the head requiring a reface.

Some cast irons may need more specific wire as Paul suggests, but I used the MIG and mild steel wire to block off the water holes in a 12G940, and repair a grinding mistake. Worked fine for me (and plenty more examples on the internet). Easy and nothing to lose by trying.

Edited by PhilR on 23rd Feb, 2015.

ally bronze rod and Tig?

is the head the same material as the block?
i know of a couple people who have welded the block with a regular mig
maybe even 3 people, didnt Simon ( madmk1) do this after breaking through making space for a turbo

Yes i moved to the darkside

Instagram @jdm_brett

You cant weld iron with steel so mig is out of the question. You can only weld iron with iron and provided its clean it welds very nicely, but as its nothing special Id replace it as Tom says

I seriously doubt it!

would rather find a 295 but i may get this one fixed a mate has offered to weld it as Paul has said for beer tokens and keep it as a spare.

is there enough to fit a tapered plug possibly an over size one?

if a std head id use a another one imo