catalytic converter nut size
Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: 1972-1976 Ford and Mercury
Forum Description: Technical discussion for 1972-1976 Ford and Mercury
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=6892
Printed Date: 26-March-2026 at 7:26AM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: catalytic converter nut size
Posted By: TV 2M8O
Subject: catalytic converter nut size
Date Posted: 03-March-2012 at 7:24AM
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OK guys, time for my stupid question of the week... Was over working on the Torino this morning and the task of the day was to drop the exhaust out from under it. Got her all up on the jack stands and roll under her with tools in hand to remove the nuts holding the exhaust H pipe to the converters ('76 460). The 1/2" socket was too small, so I put the 9/16" socket on the ratchet extension and got ready to put my all into it to break it loose only to have the socket slip on the nut. Thought perhaps it might have been a metric nut but no suck luck. So my question is: Is the nut holding the H pipe to the converters 17/32" or have they eroded? Thanks for your help!! -------------  TV 2M8O OUT JOE 1976 Gran Torino S&H season 2-4 Clone Project Blog: http://tv2m8o.blogspot.com/ |
Replies:
Posted By: kenneth
Date Posted: 03-March-2012 at 7:50AM
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I wouldn't know the nut size, but the threads may have exhaust cement on them too, along with rusted on ?? Might need to use one of the reciprocating saws mentioned here in another thread ------------- 1973 Q code sports roof |
Posted By: 75GranMan
Date Posted: 03-March-2012 at 12:09PM
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I believe the nuts to be 5/8 originally.make sure your using a 6 point socket.nuts are probably rusted away,try a metric socket that fits snuggly,you might have to tap the socket onto the nut.heating the nuts will help greatly and or soaking them in weasle piss(penetrant oil). ------------- John 75Gran Torino 4spd  |
Posted By: TV 2M8O
Date Posted: 04-March-2012 at 4:14AM
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John, Got 'em soakin! 99% sure it was a 9/16 nut I was using but I'll bet you are right that it was a 12 point. I'll have to check and get the appropriate style. They aren't too rusty but like kenneth suggested might have something on them to prevent loosening.....  Thanks guys! ------------- TV 2M8O OUT JOE 1976 Gran Torino S&H season 2-4 Clone Project Blog: http://tv2m8o.blogspot.com/ |
Posted By: stanman
Date Posted: 04-March-2012 at 5:54AM
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I think they've probably rusted away a bit and now they're "between" sizes. I try to always use 6 point sockets, especially on something that's rusty or hard to get started. If you can give them a "whack" with a hammer and cold chisel it might help break them loose too. If all else fails, a nut splitter has helped me on occasion. http://www.bing.com/shopping/performance-tool-heavy-duty-nut-splitter-model-w88030/p/46BEB2EAEEFC3FE15012?q=nut+splitter+tool&lpq=nut%20splitter%20tool&FORM=HURE" rel="nofollow - http://www.bing.com/shopping/performance-tool-heavy-duty-nut-splitter-model-w88030/p/46BEB2EAEEFC3FE15012?q=nut+splitter+tool&lpq=nut%20splitter%20tool&FORM=HURE
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Posted By: TV 2M8O
Date Posted: 04-March-2012 at 6:01AM
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LOL, yeah I was just looking at those! Thanks Stan... ------------- TV 2M8O OUT JOE 1976 Gran Torino S&H season 2-4 Clone Project Blog: http://tv2m8o.blogspot.com/ |