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willysmjeeps.com :: View topic - M38a1 exhaust flex pipe
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M38a1 exhaust flex pipe

 
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JayO
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Joined: Mar 08, 2018
Posts: 5
Location: London, Ontario, Canada

PostPosted: Tue Jun 09, 2020 2:58 pm    Post subject: M38a1 exhaust flex pipe Reply with quote

Hello colleagues,
I have a 1970 Canadian Three M38a1 and I am working out some noises from below. My exhaust is stock and in good condition. It surprises me that the exhaust does not have a flex portion and...is not mounted on a rubber hanger. I wonder sometime if I hear a flexing exhaust system. The clamps that secure the system to the frame are currently tight and allow no movement. I thought engines move perpendicular to the length wise frame. Therefore how could exhaust be rigidly attached. I appreciate very much your thoughts. Stay safe. Jay. London Ontario Canada.
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GPA
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Joined: Aug 07, 2008
Posts: 212
Location: Hungary

PostPosted: Sat Jun 13, 2020 8:40 am    Post subject: Reply with quote

I've mounted the exhaust system with rubber hangers on M38A1. Visually, hardly noticeable.
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1960 M38A1, M100 Trailer
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wesk
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Joined: Apr 04, 2005
Posts: 14908
Location: Wisconsin

PostPosted: Sat Jun 13, 2020 9:07 am    Post subject: Reply with quote

Apparently the Willys engineers believed that the few curves and bends in the pipe would allow adequate flexing for the inch or 2 forward/aft movement of the engine.
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Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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BCA
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Joined: Jul 02, 2011
Posts: 129
Location: Milton, Ontario

PostPosted: Thu Jun 25, 2020 9:00 am    Post subject: Reply with quote

Final adjustment of the exhaust system can be done by varying the spacer in the rear muffler clamp so that the system is in a relaxed position. Always consider that settling of old motor mounts or body to frame cushions can put stress on the exhaust system: bad news for manifold outlets.
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