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Discussion Starter · #1 ·
ok well i was just about finished and i hit water on the end exhaust port. just a little hole maybe the size of a pencil lead. can i fix this with jb weld? we used to use this stuff in school to fix tractor blocks, and an old head that was cracked and couldn t be fixed. all of these case worked out great, but can i do this with my heads. are they ruined? please help!
 

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You can use JB steel, but you have to have it dry and do it from both sides! BOTH SIDES or it will fail. JB wels steel or even better, the clay substance called MAX STEEL.


FE
 

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I certainly wouldnt trust it, exhaust temps are hot. Maybe that stuff is better nowadays
 

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Discussion Starter · #4 ·
how am i gonna get it in the water jacket? it is between the two end exhaust ports
 

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I'd take it to a good welding or head repair shop and have it welded simply because it would totally suck to have to pull the motor apart if the "quick fix" didn't work. For the $50-$75 you'll pay for a weld job its worth it considering you'll have to buy new intake, head, and header gaskets plus the time involved. Chris
 

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It's junk........

If it was the intake side you could use JB weld but not the exhuast...

Welding it will be tough cause it's paper thin........
 

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A welding shop can easily braze it with acetylene torch. My heads were done 20+ years ago and no problem.
 

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Dayam... I thought it was an intake port.... Try to have it brassed.... Maybe welded then re, grind it but not quite so far this time....


FE
 

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Good luck welding it. I doubt it can be done successfully.
Brazing might work ok.......
This site is kinda trick. I've no idea how much it costs though.
http://www.belzona.com/enc.aspx
This is the stuff CAT uses to fix diesel blocks and
heads. Don't know the temperature range..... you'd
have to see "your local authorized dealer."
 

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I hit water in an exhaust port many years ago and had a welding shop repair it... unfortunately it didn't last 500 miles.

Heat is the biggest problem. You may want to contact these guys to see if they have any recommendations.
http://cotronics.com/vo/cotr/

I did notice a repair putty for up to 2000 degrees.
 

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http://www.aluminumrepair.com/

I used the iron brazing rod from ths company to fix my Aussie heads when I went a little far with my porting and hit a water jacket. It works well and is harder than the iron in the heads. The aluminum repair rod I got from them does not work from what I have tried and I have given it to other people and they couldn't get it to work either. The iron rod repair does work, but you have to super heat the heads almost to the point of melting the surrounding area of the repair before the rod will melt and start to flow into the area. It usually looks like you make it worse before you make it better, but after you goober it all up with the rod, you just blend it back down into the head and it looks like nothing was wrong except for a gold colored patch repair.
 

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"http://www.aluminumrepair.com/ "

Where was this when I needed it?
It looks like great stuff but I'm wondering what temperature it can withstand.
 

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http://aluminumrepair.com/video_new.asp

Id like to try it But what they dont mention is wether or not the high heats on aluminum will lose there hardness. In the video they butt weld two bars of aluminum together. Their weld doesnt break but the aluminum bars seem to bend rather easily. I dont recall 6061 t6 bar that thick bending that easily.
just an observation. Anyone else have thoughts??
 

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Belzona is great stuff but it won't work in an exhaust port - after all it is just a high density epoxy - I have used it for a lot of things but it doesn't hold under high heat.

Braze it or weld it but you may not get much life out of it. This is why they make porting templates, so that you don't go too far. If you wemt through on that port how thin are your other port walls?
The best fix is to get a new set of heads and do it right.
 
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