- Thread starter scott_shot
- Start date
MattF
Forum Supporter
- Messages
- 17,666
- Location
- South Yorkshire
No idea what level of heat is generated by welding, but I'd be surprised if you could subject that to much worse than it gets each time the engine is running, provided you do short stints of weld and let it cool. EGT's are pretty damned high on any engine. Anything in that vicinity is easily going to withstand a few hundred centigrade, and seeing as the melting point of aluminium is around 650 degrees, if I recall correctly, can't see as you'd have a problem. Like I say though, I know diddly about any form of welding. 
Still think you're overthinking it though. Just get some threaded rod and pop a piece into the remaining thread to see how much you have to work with. If you've got around 1/4" or above, you should be absolutely fine as is.
Still think you're overthinking it though. Just get some threaded rod and pop a piece into the remaining thread to see how much you have to work with. If you've got around 1/4" or above, you should be absolutely fine as is.
scott_shot
Member
- Messages
- 119
when you say as is??? lol you mean without repair at all? i reckon i have 1/4" and no more tbh.No idea what level of heat is generated by welding, but I'd be surprised if you could subject that to much worse than it gets each time the engine is running, provided you do short stints of weld and let it cool. EGT's are pretty damned high on any engine. Anything in that vicinity is easily going to withstand a few hundred centigrade, and seeing as the melting point of aluminium is around 650 degrees, if I recall correctly, can't see as you'd have a problem. Like I say though, I know diddly about any form of welding.
Still think you're overthinking it though. Just get some threaded rod and pop a piece into the remaining thread to see how much you have to work with. If you've got around 1/4" or above, you should be absolutely fine as is.
Your prob right there though I have been overthinking latley with the change of prescription the doc has gave, noticed a couple times now, might have to get the doc told to get it changed if its effecting my build haha
MattF
Forum Supporter
- Messages
- 17,666
- Location
- South Yorkshire
Yup. You have the mechanical strength provided by the other mounting points holding the header stationary, so that one spot is mainly only needed to supply enough compression for the flange to compress the gasket to the block to seal.
There is always the slight chance that the bottom portion could break too, especially if it was weakened when the other part was damaged, but there's only way to find that out in practice.
You could follow Pete's suggestion and make an extra support/clamping plate spanning several bolt holes, for a bit more piece of mind.
scott_shot
Member
- Messages
- 119
Thanks matt makes sense, , pete's idea is a good'un may try that but i will post on my build when i get somthing done about it. And Cheers to all who replied, Great help all of you. God damn i love this forum and the help you can get here
Jim_gsxr1000
Mechanical Magician
- Messages
- 1,296
Your only 10 mins up the road mate 
Jim_gsxr1000
Mechanical Magician
- Messages
- 1,296
What about hts 2000 aluminium repair rods ? I have some in my garage
scott_shot
Member
- Messages
- 119
What about hts 2000 aluminium repair rods ? I have some in my garage
Dunno what they are lol i gather there rods for MMA
shenion
Tool Pack Rat
- Messages
- 7,586
- Location
- Stone Mountain, GA USA
They are aluminum brazing rods.
I have done similar repairs with similar rods. Takes a lot of heat, is tricky to do right, but it works. The stuff lows like water so you need to be able to get it flat and build a dam to mold the repair (steel works.)
Getting the braze to stick is the issue. By the time you get it hot enough, eth aluminum has oxidized.
I'd TIG it up and drill/tap.
scott_shot
Member
- Messages
- 119
lol kinross damn its a small world
. went to school there haha
. went to school there hahascott_shot
Member
- Messages
- 119
lol getting abit off topic but how old are you mate if you dont mind me asking
