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Old 12-14-2013, 11:31 AM   #1
Deuce Man
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Default T exhaust manifold threads

Does anyone have a thread chaser for the packing nut threads on my manifold? I have been working them with a thread file for a few evenings, getting close but still not as nice as a thread chaser could do. I would be happy to rent one and pay for postage. Rich
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Old 12-14-2013, 11:46 AM   #2
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Default Re: T exhaust manifold threads

If you cannot borrow one, Snyder's sell this one for $85.

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Old 12-14-2013, 01:04 PM   #3
redmodelt
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Default Re: T exhaust manifold threads

Or you can buy a nice new manifold for about the same price.
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Old 12-14-2013, 01:24 PM   #4
Steve Jelf
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Default Re: T exhaust manifold threads

Actually, a new manifold costs a few dollars less than the tool.
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Old 12-14-2013, 01:30 PM   #5
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Default Re: T exhaust manifold threads

I sent him a PM to check for flatness and sag before spending a lot of time re-working his old manifold also about gaskets.
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Old 12-14-2013, 02:33 PM   #6
Farmallcub49
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Default Re: T exhaust manifold threads

Jack,

Isn't that for chasing hub threads?
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Old 12-14-2013, 04:39 PM   #7
Jack Innes
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Default Re: T exhaust manifold threads

Quote:
Originally Posted by Farmallcub49 View Post
Jack,

Isn't that for chasing hub threads?
Yes it is; another lesson in not reading correctly!

Redmodelt's suggestion on a new manifold is the best solution.

You can buy a 1 7/8 - 16 rethreading die for the price of 2 new manifolds but I am afraid you would need to be trained in government economics to justify that.

http://www.mscdirect.com/product/797...rItem=79770368
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Old 12-14-2013, 07:40 PM   #8
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Default Re: T exhaust manifold threads

The one thing you never see archival footage of is the manifold threading department. When I was about 10 my grampa spent an afternoon looking through all his threading stuff for a die nut for us swearing it was a pipe thread. NOT. To this day I still inspect boxes of dies at swap meets looking for one. ws
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Old 12-14-2013, 09:02 PM   #9
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Default Re: T exhaust manifold threads

I used a thread file and worked the manifold till the nut got tight as I would risk it.
Then I drilled a hole in one of the flats on the nut and put a pointed set screw in it to lock the nut on. It worked long enough for me to find another manifold.
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Old 12-15-2013, 04:38 AM   #10
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Default Re: T exhaust manifold threads

Ah just a plain ole muffler clamp behind the nut. Has'nt backed off yet!!!
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Old 12-15-2013, 10:38 AM   #11
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Default Re: T exhaust manifold threads

I purchased a die from MSC for about $120. Our club has a manifold sreaoghtening party one Saturday. We straightened and chased about 18 manifolds in one day. It takes about a 2foot cheater to run the die on the manifold threads.

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Old 12-15-2013, 03:25 PM   #12
Deuce Man
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Default Re: T exhaust manifold threads

This manifold is mounted on the motor with new gaskets, runs real well. I was just trying to make the threads work without disturbing too much. I worked the threads with a thread file, and at the advice of a friend detailed it with a three sided file. Finally got the packing nut to snug up without that annoying squeaking, screeching, thread galling sound. Pipe is snug, new muffler is on. Thanks for the advice and support guys! Rich
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Old 12-18-2013, 05:40 AM   #13
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Default Re: T exhaust manifold threads

MSC sells a the file which has 4 different thd.pitches milled into the sides of the square file.they are cheap. And very handy around the shop.You will find it much easier to use as it files multiple thds at the same time.
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Old 12-18-2013, 08:31 AM   #14
Deuce Man
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Default Re: T exhaust manifold threads

Trainguy, thanks I have a couple of sets of these "thread files" you mentioned. Thats what I initially used, 16 threads per inch seemed to match my manifold. I did the final with a three sided file, which was much more agressive than the multi sided thread file. All in all I was tickled by the results. Rich
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Old 12-18-2013, 01:22 PM   #15
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Default Re: T exhaust manifold threads

If you need a temporary fix for threads so worn that they will not grip and hold, try a wrap of aluminum foil on the manifold threads.
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Old 12-31-2013, 10:52 PM   #16
Bruce,Upstate NY
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Default Re: T exhaust manifold threads

For a non-show car I cut across one flat with hacksaw, run the nut up the thread and clamp it with an exhaust clamp.
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Old 01-01-2014, 12:09 AM   #17
Ken Ehrenhofer
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Default Re: T exhaust manifold threads

A newby here! Can you tell me what company is MSC? Thanks
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Old 01-01-2014, 12:13 AM   #18
Jack Innes
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Default Re: T exhaust manifold threads

http://www.mscdirect.com/
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Old 01-01-2014, 10:55 AM   #19
Ken Ehrenhofer
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Default Re: T exhaust manifold threads

Thanks Jack, I usually go to McMaster Carr for most of my stuff,
Happy New Year
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