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Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

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Old 04-13-2011
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Default swing radiator bolts

I am looking for the name of the nuts that the 3/4" bolts used to hold the swing radiator frame to the coach. My last one of two fell off and I am currently using a bumper bolt to hold it in place. The nut side of those bolts is almost impossible to get to. Luckily there is a square hole for the nut so I used the carriage bolt head for a temporary fix. Not having a lot of luck explaining my needs to the NAPA counter guy as I don't really understand it too well myself. But the nut was in some kind of floating sheet metal that held it in place while tightening. Thanks.
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Old 04-13-2011
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captive nuts maybe?
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Old 04-13-2011
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Quote:
Originally Posted by markbragdon View Post
I am looking for the name of the nuts that the 3/4" bolts used to hold the swing radiator frame to the coach. My last one of two fell off and I am currently using a bumper bolt to hold it in place. The nut side of those bolts is almost impossible to get to. Luckily there is a square hole for the nut so I used the carriage bolt head for a temporary fix. Not having a lot of luck explaining my needs to the NAPA counter guy as I don't really understand it too well myself. But the nut was in some kind of floating sheet metal that held it in place while tightening. Thanks.
Can the nuts be welded in place on your coach. That is what i did on our previous 1974 coach when doing the swing radiator project.
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Old 04-13-2011
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Quote:
Originally Posted by Randy Dupree View Post
captive nuts maybe?

That is what is on mine and they are a pain to work with or replace if they go bad, because you can't reach up in there.


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Old 04-13-2011
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I tapped the sleeves, 3/4" I think and went with bigger diameter much shorter bolts. Simple and sweet.
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Old 04-13-2011
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They are called Panel Nut Retainers @ Mc Master/ Carr # 90680A158 @ 9.95 each. I got large washers and heavy duty nuts welded , then tack welded to the back of radiator frame. Bolt all together (-) radiator to get them placed right.
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Old 04-14-2011
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Thank you very much. I do not want to remove the radiator again this year, so I will try to get the original nuts. Thanks to all!
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