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Old 02-13-2005, 09:45 AM
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removing rusted out fitting

im attempting to remove a rusted out heater hose fitting on my Offenhauser manifold.
its the 7/8 fitting for the heater.
its rusted out so bad that the hole is actually closing up a bit.
and the surfaces to grab on to are begining to round off.
I have stainless replacement fittings that id like to use once I remove it but I am afaid once it moves itll take the threads with it aswell.
I was going to attempt to heat the fitting to help loosen the bond the rust has on the manifold.
any ideas?

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Old 02-13-2005, 10:20 AM
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I have taken my die grinder and cut it out ....carefully. As a rule, they are so rusted..........they are weak and crumble.

I cut into them at 12 o'clock and a 6 o'clock. I then take a small chisel and tap the halves inward ( towards each other.........NOT into the intake )

Then I re tap the hole............

Works for me.............but be careful.

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Old 02-13-2005, 11:47 AM
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I got the fitting soaking in some Kroil right now Ill keep giving it a bath in it for one last attempt at loosening it.
then Ill try your method.
oh boy a chance to finally use my die grinder!
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Old 02-13-2005, 11:53 AM
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Cutting it out is your best bet.............Ahh, good old oxidation.
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Old 02-13-2005, 12:11 PM
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Heat using a oxy/acetlylene torch to red heat, repeat until fitting comes out. The different expansion rates of the two metals will break the corrosion bond and allow the fitting to be extracted with ease.

Works everytime.
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Old 02-13-2005, 12:15 PM
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I am always leery about heating up aluminum too much..............but, that's just me.
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Old 02-13-2005, 12:35 PM
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I dont have a torch but I do have mapp gas.
wont be as hot.
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Old 02-13-2005, 02:42 PM
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I would drop another larger fitting or nut over it, Weld it to the stuck fiiting, using plenty of heat, let it cool, and screw it out. I just did this the other day to get a junk heater hose fitting out. It works every time.
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Old 02-14-2005, 09:51 AM
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yeah Im gonna heat then quench it to loosen the rust then take a 7/8 deep socket with breakerbar to attempt to loosen it.
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Old 02-14-2005, 12:10 PM
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Thanks for bringing that up Poncho.

I've got a Winters aluminum intake that had a stuck fitting. I took it to the speed shop and he tried to muscle it out. I almost had a heart attack. As a last resort, I took it to the machine shop. I don't know what they did...don't care...it's out.
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Old 02-14-2005, 12:20 PM
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Chuck speaks with straight tongue. Heat always works. Get to low red then quickly quench and you won't hurt the aluminum. There is enough insulating value in the corrosion and aluminum transfers heat away very efficiently so there is little chance of heat damage to the aluminum as long as you don't go crazy and try for yellow hot on the steel!
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Old 02-14-2005, 03:55 PM
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If you do end up with messed up threads, there is always Heil Coils.
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Old 02-14-2005, 04:55 PM
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helicoil pipe thread ?
never knew that exsisted?
anyhow I heated and quenched the fitting 3 times.
I got that sucker out but there is a small area of damaged threads.
luckely they are at the bottom of the hole so I dont think it will leak.
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Old 02-14-2005, 05:37 PM
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That's why God made Teflon tape!
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Old 02-14-2005, 05:42 PM
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Quote:
Originally posted by dawg
helicoil pipe thread ?
never knew that exsisted?
http://www.jtsmach.com/jtswebshop/Ta.../T246.asp#pipe
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