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Author
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Topic: 351C 4bbl exhaust bolts???
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71RESTO
Gearhead Posts: 1243
From: Oregon, USA
Registered: Oct 2000
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posted 04-29-2002 11:40 PM
  
I am in the process of installing stock exhaust manifolds on my '73 Mach w/351c 4bbl (the headers finally tore open) and was wondering which hole the stud goes in. I purchased a set of stock exhaust manifold bolts and in the set it has 8 short bolts (for the inside holes), 6 long bolts & 2 long studs. My question is, which port does the studs go in-- front port(1 & 5 cylinders) or back (4 & 8 cylinders). I checked my '71 for reference and it has bolts across all the cyclinders.
Does anyone know or can they check for me??
Thanks much for the help.------------------
Duane
71 Fastback (his) under resto (351C-4V C6 auto)
73 Mach 1 (hers) (351CJ 4 speed)
66 289/2V coupe (daughter Ashley's)
89 LX 2.3 convertible (daughter Amanda's)
M & M Member #730
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SteveLaRiviere
Administrator Posts: 30261
From: Saco, Maine
Registered: May 99
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posted 04-30-2002 08:22 AM
The studs were used to hold the pre-heat shield on the right {passenger} side, so 1 and 5, right? {if it's not 1 and 3}------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
MCA Member # 47773 The secret of success is sincerity. Once you can fake that, you got it made.
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Dave Witthoeft
Gearhead Posts: 1954
From: IL.
Registered: Dec 2000
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posted 04-30-2002 02:21 PM
I just checked my 71 for you. No studs. Am I suposed to have studs? I seem to be studless. 
I'll keep checking other sources.  ------------------
MCA# 48755
71 Mach 1
69 Fastback
92 F-150
M&M#884
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PONYMAN
Gearhead Posts: 227
From: Ardmore, Ok. USA
Registered: Jul 99
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posted 04-30-2002 10:15 PM
Yeah, you are supposed to have two studs on the passenger side. From the front, the first stud, and the third back should have the studs. These were used to hold the pre-heat shield for the air cleaner on. Most of these soon rusted away, and they were a pain and a very close fit. One of these heat shield is very hard to come by. I have a NOS one, but the guy who overhauled my engine before I got the car neglected to put the two stud bolts in. I have them, but I KNOW as soon as I put a wrench on the bolt to remove it that the head will twist off and I will be trying to drill the bolt out of the head.
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71RESTO
Gearhead Posts: 1243
From: Oregon, USA
Registered: Oct 2000
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posted 04-30-2002 11:13 PM
Thanks guys!!!!!! This confused me also due to the fact my '71 has the heat shield on it, but it has bolts holding it on rather than the studs. It also has two small bolts holding the shield on that screw into tapped holes in the manifold (about 3/16"-1/4").It definately makes sense to use the studs on the 1st and 3rd holes though.
BTW, the bolt box (brand new from a mustang parts house)lists the set for '72-'73 manifolds, so maybe the '71s just used bolts without studs.
Thanks for the help again!!!!!!!!!------------------
Duane
71 Fastback (his) under resto (351C-4V C6 auto)
73 Mach 1 (hers) (351CJ 4 speed)
66 289/2V coupe (daughter Ashley's)
89 LX 2.3 convertible (daughter Amanda's)
M & M Member #730
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