manifold problems. 360/390
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71f250highboy
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manifold problems. 360/390
so I'm attempting to change manifold gasket on my 71 f250 highboy. well apparently the PO did this at some point and used a cheap 14mm bolt instead of a decent grade 8 or stainless bolt/stud. well I snapped it off after letting it soak for 3 days of constant application of WD-40 specialist. now it broke almost flush with the manifold outter edge(closest to inner fender) I know I need to pull hood/outer and inner fender to access it as I'm trying to do it in the truck and don't want to cut and re-weld inner fender in with my tombstone welder. so my question is what is the specs on the factory studs. And how should I go about drilling the rest of the bolt out if I cant get it out with a welded on nut or an "ease out" ? Thanks in advance.
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tnlprt
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Re: manifold problems. 360/390
Take the one head off
Takes less than an hour
Takes less than an hour
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eggman918
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Re: manifold problems. 360/390
Steve
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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Ohiotinkerer
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- Location: Galion, Ohio
Re: manifold problems. 360/390
Probably not what you wanted to hear but pulling it is gonna be the easiest way to do it. A little info I got from the guys on here before I did mine is soak the bolts in a 50/50 mix of acetone and ATF......I was skeptical at first but after having EVERY bolt come right out - even the studs for the pipe - with no effort I was sold. I use it on everything now......... 
"Life is a garden - dig it"...........
1968 F100 2wd - Rangoon Red - 360 w/T18 - power steering and brakes
1997 Honda CBR 900RR
1968 F100 2wd - Rangoon Red - 360 w/T18 - power steering and brakes
1997 Honda CBR 900RR
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Nitekruizer
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- Location: Manitoba, Canada
Re: manifold problems. 360/390
tnlprt wrote:Take the one head off
Takes less than an hour
That's what I had to do when I broke a couple of bolts. It was probably easier in the long run. I had to buy a pair of head gaskets, so I ended up with a spare. 
The torque specs for the bolts is actually surprisingly low, to me anyway, just around 12-14 ft/lbs.
390 FE IN A "BUMP" / 383 WEDGE IN A 2 DOOR C-BODY / 351W IN A FULL-SIZE MERCURY / 194 CHEVY 6 IN A DUECE / 2.4 DOHC CHRYSLER IN A PLASTIC BUBBLE (Driver)