Barracuda Challenger Forum

Author Topic: Broken exhaust manifold stud  (Read 262 times)

Offline 73440

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Broken exhaust manifold stud
« on: May 06, 2017 - 02:53:03 pm »


Took a drive to Smileys Racing to buy 5 gallons of VP 110 leaded. Adjusted the idle, checked timing , it's at 12 btdc , then tried to reduce exhaust manifold leak and decided to snap one of the studs.
Still has the original turquoise paint on the bolt.
67 440
73 Barracuda w/ 68 440
65 Plymouth Fury III , I sold ,was my Nana's car till 92 yo.
51 Ford F1 239 Flathead, flipped , new cab , stolen
59 BelAir 283 4 door original patina
01 Chevy van 378,304 miles
06 Crown Vic Police Interceptor
75 HD Ironhead converted to RH shift
73 HD Ironhead
82 HD Ironhead
74 Norton 850
80 HD Shovelhead
80 Husqvarna WR 390




Offline xtopfuel

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Re: Broken exhaust manifold stud
« Reply #1 on: May 06, 2017 - 04:02:15 pm »
Ugh that sucks

Offline 73440

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Re: Broken exhaust manifold stud
« Reply #2 on: May 06, 2017 - 05:20:18 pm »
It turned very easy, so it was probably going to let go soon.
Now it matches the starter bolt threads in the bell housing that are stripped.
40 year old engine will do that.
67 440
73 Barracuda w/ 68 440
65 Plymouth Fury III , I sold ,was my Nana's car till 92 yo.
51 Ford F1 239 Flathead, flipped , new cab , stolen
59 BelAir 283 4 door original patina
01 Chevy van 378,304 miles
06 Crown Vic Police Interceptor
75 HD Ironhead converted to RH shift
73 HD Ironhead
82 HD Ironhead
74 Norton 850
80 HD Shovelhead
80 Husqvarna WR 390


Offline xtopfuel

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Re: Broken exhaust manifold stud
« Reply #3 on: May 06, 2017 - 11:25:53 pm »
True

Offline mopar jack

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Re: Broken exhaust manifold stud
« Reply #4 on: May 07, 2017 - 09:43:37 am »
I have had that happen on the drivers side rear bolt, just broke off with no torque.

Offline 73440

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Re: Broken exhaust manifold stud
« Reply #5 on: May 07, 2017 - 03:54:11 pm »
 I recently replaced the header with the exhaust manifold and maybe it's possible that with the heating and the cooling and the different expansion rates of cast iron and steel tubing the stud stretched it a little bit because it was fine a month or so ago when I last checked .
This stud was drivers side second from front.
67 440
73 Barracuda w/ 68 440
65 Plymouth Fury III , I sold ,was my Nana's car till 92 yo.
51 Ford F1 239 Flathead, flipped , new cab , stolen
59 BelAir 283 4 door original patina
01 Chevy van 378,304 miles
06 Crown Vic Police Interceptor
75 HD Ironhead converted to RH shift
73 HD Ironhead
82 HD Ironhead
74 Norton 850
80 HD Shovelhead
80 Husqvarna WR 390

Offline 67vertman

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Re: Broken exhaust manifold stud
« Reply #6 on: May 08, 2017 - 01:35:11 pm »
Sorry hear that.   :hyper: Hopefully it is not flush to the head and you can get it out easily .  :2thumbs:



Ron - Born and raised in Southern California

I got the 1970 Cuda, but still need the hot blonde to ride shotgun!

First car -1969 Road Runner 383 4sp

Current ride - 1970 Barracuda 440-6 4 sp Dana 60  (4:10)

Offline 73440

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Re: Broken exhaust manifold stud
« Reply #7 on: May 08, 2017 - 02:19:39 pm »
Probably flush, it snapped right at the start of the threads.
67 440
73 Barracuda w/ 68 440
65 Plymouth Fury III , I sold ,was my Nana's car till 92 yo.
51 Ford F1 239 Flathead, flipped , new cab , stolen
59 BelAir 283 4 door original patina
01 Chevy van 378,304 miles
06 Crown Vic Police Interceptor
75 HD Ironhead converted to RH shift
73 HD Ironhead
82 HD Ironhead
74 Norton 850
80 HD Shovelhead
80 Husqvarna WR 390

Online 340-FOUR- BARRELL

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Re: Broken exhaust manifold stud
« Reply #8 on: July 20, 2017 - 12:13:18 am »
Been there several times. Used the wick method with paraffin to remove snapped exhaust manifold bolts.

Online 1 Wild R/T

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Re: Broken exhaust manifold stud
« Reply #9 on: July 20, 2017 - 01:17:50 am »
Weld a nut onto it & unscrew...
JS27N0B 70 Challenger R/T Convertible  FJ5 Sublime, Show Poodle w/90,000 miles since resto
WS27L8G 68 Coronet R/T Convertible  PP1 Bright Red, Project
RM21H9E 69 Road Runner Coupe R4 Performance Red, Sold...
5H21C  65 Falcon 2 dr Wagon... Dog Hauler...

Offline 73440

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Re: Broken exhaust manifold stud
« Reply #10 on: July 20, 2017 - 06:56:44 am »
Thanks, I need to do some work on this , will try the parrafin first and have the welder ready to go also.
Thinking of getting new set of studs installed all around while doing this repair.
67 440
73 Barracuda w/ 68 440
65 Plymouth Fury III , I sold ,was my Nana's car till 92 yo.
51 Ford F1 239 Flathead, flipped , new cab , stolen
59 BelAir 283 4 door original patina
01 Chevy van 378,304 miles
06 Crown Vic Police Interceptor
75 HD Ironhead converted to RH shift
73 HD Ironhead
82 HD Ironhead
74 Norton 850
80 HD Shovelhead
80 Husqvarna WR 390