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Exhaust Manifold Bolt Length
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Topic: Exhaust Manifold Bolt Length (Read 822 times)
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Brian
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Crazy about Buick!
Posts: 1096
Exhaust Manifold Bolt Length
«
on:
March 20, 2015, 08:26:15 AM »
Anyone have an original 65 GS 401 exhaust manifold-to-cylinder head bolt (that is not installed)? Need to know the correct length. Mine were rusty junk when I got my car, so I put some off-the-shelf bolts in it when I put the car together. Trying to find some of the correct appearing black zinc bolts now and want to get the correct length.
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'64 Skylark 2dr ht 4 speed, 300-4
'65 GS ht, 4 speed,2-4s,AC,PS,PB,PW,Pseat,Tilt
'66 Skylark 2dr ht 300-2 automatic
'78 Yamaha DT 400 2 stroke
'88 Ford F-150 4x4 (used to be 4x2)
'89 Ford F-350 4x4
'03 Honda Accord Coupe V6 6-speed manual (daily driver)
gs spoken here
Crazy about Buick!
Posts: 376
Re: Exhaust Manifold Bolt Length
«
Reply #1 on:
March 20, 2015, 10:37:17 AM »
I did the same thing and know want to get more OE bolt and put the French locks back on. Bolt I have are slightly over 1" one with lock washer is later 66 GS. I was told the early 66 GS used the same as 65 with the French locks. The bolts I have some have different letter/number on the head, some none.
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Brian
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Crazy about Buick!
Posts: 1096
Re: Exhaust Manifold Bolt Length
«
Reply #2 on:
March 20, 2015, 10:45:25 AM »
This is what I have found. Obviously will not need the washer, but the bolts look correct. Any opinions?
http://www.ebay.com/itm/1964-72-Oldsmobile-Cutlass-V8-Exhaust-Manifold-Bolts-Washers-20pc-OEM-NOS-/370785467991?pt=Vintage_Car_Truck_Parts_Accessories&hash=item5654893e57&vxp=mtr#ht_1475wt_1154
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'64 Skylark 2dr ht 4 speed, 300-4
'65 GS ht, 4 speed,2-4s,AC,PS,PB,PW,Pseat,Tilt
'66 Skylark 2dr ht 300-2 automatic
'78 Yamaha DT 400 2 stroke
'88 Ford F-150 4x4 (used to be 4x2)
'89 Ford F-350 4x4
'03 Honda Accord Coupe V6 6-speed manual (daily driver)
Mark Ascher
Administrator
Crazy about Buick!
Posts: 1615
Re: Exhaust Manifold Bolt Length
«
Reply #3 on:
March 20, 2015, 11:23:30 AM »
I'll get some pics later and post them. The length in Bill's picture looks about right.
I don't think the french lock fits under the alternator bracket, so I'll yank one of those out.
Mark
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65 GS HT 4 Speed - BCA Senior 2015; AACA Senior Grand National 2021
66 Impala 396/TH400/12 Bolt "Project Rodent Remediation" - Almost Done
69 Bel Air 2 Door Sedan "Project Junior Stock" - In Process
19 Chev Silverado Pickem Up (daily driver)
Brian
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Crazy about Buick!
Posts: 1096
Re: Exhaust Manifold Bolt Length
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Reply #4 on:
March 20, 2015, 12:10:46 PM »
I visited Tractor Supply next door over lunch break and lo and behold, the grade-5 bolts they carry are the black/dark olive color zinc! They have them in 1" and 1.5", so I got 20 of each. I can easily cut the 1.5" ones to 1.25" length in my lathe.
Logged
'64 Skylark 2dr ht 4 speed, 300-4
'65 GS ht, 4 speed,2-4s,AC,PS,PB,PW,Pseat,Tilt
'66 Skylark 2dr ht 300-2 automatic
'78 Yamaha DT 400 2 stroke
'88 Ford F-150 4x4 (used to be 4x2)
'89 Ford F-350 4x4
'03 Honda Accord Coupe V6 6-speed manual (daily driver)
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Exhaust Manifold Bolt Length