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Exhaust manifold fastener broken

Moderator: Mod Squad

DoctorC
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Joined: Wed Mar 20, 2019 2:01 pm

Exhaust manifold fastener broken

Post #1 by DoctorC » Tue May 14, 2019 2:20 am

Hi all,
Upon inspection of my engine bay today, I noticed that the exhaust manifold cast catch of the fastener bolt (front) has half missing. It's rough and dirty, so it's been like that a loooong time. Is this anything I should be concerned about? It's the cylinder head that is broken, so I guess to fix it I'd have to swap heads. I'm thinking of upgrading to a large log anyway, but not for a while.

Any thoughts?

Pic attached

Thanks in advance!
-DrC
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1967 Cherry Red Mustang
All stock

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StarDiero75
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Location: Bremerton, WA

Re: Exhaust manifold fastener broken

Post #2 by StarDiero75 » Tue May 14, 2019 3:57 am

DoctorC wrote:Hi all,
Upon inspection of my engine bay today, I noticed that the exhaust manifold cast catch of the fastener bolt (front) has half missing. It's rough and dirty, so it's been like that a loooong time. Is this anything I should be concerned about? It's the cylinder head that is broken, so I guess to fix it I'd have to swap heads. I'm thinking of upgrading to a large log anyway, but not for a while.

Any thoughts?

Pic attached

Thanks in advance!
-DrC

Mine is the same, just don't touch it and you should be fine. If you dont have an exhaust leak, especially don't touch it. You csn keep the same head, but it will need to be cast iron welded. I'm going to a later head so I'm not worrying about mine. If thats what you plan to as well, don't worry about it
--1965 Ranchero w/1966 200 and 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), 1968 1.08 Autolite 2100 with VI adapter, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected. But it lives
--Creator of the only Weber 32/36 conversion video.

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Econoline
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Re: Exhaust manifold fastener broken

Post #3 by Econoline » Tue May 14, 2019 11:04 am

It's prety common for people to break those ears off. Not one of Fords better ideas. People do like what was done there and use a longer bolt with a nut, and usually a washer, to help hold on to what's left.
It ain't gonna fix itself

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StarDiero75
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Re: Exhaust manifold fastener broken

Post #4 by StarDiero75 » Tue May 14, 2019 3:05 pm

Looks like youre missing a bolt too to the left of the jerry rigged one
--1965 Ranchero w/1966 200 and 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), 1968 1.08 Autolite 2100 with VI adapter, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected. But it lives
--Creator of the only Weber 32/36 conversion video.

drag-200stang
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Location: Michigan

Re: Exhaust manifold fastener broken

Post #5 by drag-200stang » Tue May 14, 2019 8:38 pm

Well it now looks like you have two reasons to ditch the early dog log head, and go with the late model high flo funnel port log head.
Last edited by drag-200stang on Wed May 15, 2019 9:04 am, edited 1 time in total.
66 Mustang Coupe
200 turbo w/lenco 4-spd
stock adj. rockers, stock timing set, ARP studs
best 1/4 mile ET 9.85/best mph 139 on 8 lbs progressing to 15 lbs boost
Went 9's when 10's was fast.

DoctorC
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Re: Exhaust manifold fastener broken

Post #6 by DoctorC » Tue May 14, 2019 11:55 pm

I just finished the Falcon Handbook... I'm liking the idea of a new exhaust manifold for an easy boost... and now I have an excuse too!
1967 Cherry Red Mustang
All stock

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StarDiero75
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Location: Bremerton, WA

Re: Exhaust manifold fastener broken

Post #7 by StarDiero75 » Wed May 15, 2019 2:39 am

DoctorC wrote:I just finished the Falcon Handbook... I'm liking the idea of a new exhaust manifold for an easy boost... and now I have an excuse too!

You'll need a new head too or fix yours. if you want the most CCs of intake, go with a hex log from 1980. Thats what i have. I believe it has another 70 CCs over the flat top.

Good luck,
Ryan
--1965 Ranchero w/1966 200 and 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), 1968 1.08 Autolite 2100 with VI adapter, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected. But it lives
--Creator of the only Weber 32/36 conversion video.

DoctorC
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Joined: Wed Mar 20, 2019 2:01 pm

Re: Exhaust manifold fastener broken

Post #8 by DoctorC » Wed May 15, 2019 3:07 am

Exactly what I have in mind. Theres a few about 200mi away ina parts yard. I'm gonna call and see how much to ship. Only about 100 bucks for the head!
Did you mill your head to compensate for gasket and increase CR, or how did you deal with the volume change/CR?
1967 Cherry Red Mustang
All stock

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StarDiero75
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Re: Exhaust manifold fastener broken

Post #9 by StarDiero75 » Wed May 15, 2019 3:33 am

DoctorC wrote:Exactly what I have in mind. Theres a few about 200mi away ina parts yard. I'm gonna call and see how much to ship. Only about 100 bucks for the head!
Did you mill your head to compensate for gasket and increase CR, or how did you deal with the volume change/CR?

I have yet to get that far. All the work I've done to it is solely the 2V conversion. I'll be upping the exhaust valve to 1.5 next and checking the combustion chambers afterwards. Hopefully it won't need to be milled much since it was redone not too long ago by the previous owner.
--1965 Ranchero w/1966 200 and 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), 1968 1.08 Autolite 2100 with VI adapter, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected. But it lives
--Creator of the only Weber 32/36 conversion video.

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chad
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Location: Lawrence Swamp, S. Amherst, MA

Exhaust manifold fastener broken

Post #10 by chad » Wed May 15, 2019 11:18 am

"...Did you mill your head to compensate for gasket and increase CR, or how did you deal with the volume change/CR?..."
"...just finished the Handbook..."
Ur really gettin into it now. Stick w/the Handbook. To answ ur Q U will C the "CCing the head". Lotta factors go into this inc the "gasket compression thickness", trueing out any 'non-flat' warps, and exact voluumn of that new head.

I bettin (depending on mi put on & type of drivin) U gotta alot of time to wrk out all the details. That rig'll run as is. Keep ur eyes onit @ that location, assess 4 escapin heat, runnin condition & 'nearer the end' a compression ck on #1.
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", tool boxes, etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749

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