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01-18-2018, 06:03 PM
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#1 |
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Registered User
Join Date: May 2011
Location: Fort Pierce, FL
Posts: 430
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72 350 Intake Manifold Bolts
Do the intake manifold bolts get washers, regular or lock?
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01-18-2018, 06:22 PM
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#2 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
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Re: 72 350 Intake Manifold Bolts
Never used lock washers on an intake manifold. I've always used regular washers on. Also, make sure you put thread sealer (not thread locker) on the bolt threads as well. Or oil from the lifter valley will creep up the threads and pool on your intake.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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01-18-2018, 06:24 PM
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#3 | |
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Registered User
 Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: 72 350 Intake Manifold Bolts
Quote:
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01-18-2018, 06:24 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,509
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Re: 72 350 Intake Manifold Bolts
With aluminum use flat washers. Cast iron doesn’t need any.
Watch your bolt lengths. 4 bolts are shorter if IIRC. The ones that screw in close to the pushrods are shorter. |
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01-18-2018, 07:35 PM
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#5 |
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Registered User
Join Date: Jul 2011
Location: strausstown pa
Posts: 3,394
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Re: 72 350 Intake Manifold Bolts
Also the four corners are blind holes gotta watch too long of a bolt in them and they will bottom out and not seal.
Gotta watch those push rods too, and the path they travel as they just don't move up and down. Your asking for some serious issues if the intake bolts are too long and they lock up or rub the rods.
__________________
81 camaro 355 4/spd 342 posi my first love  .67 swb step 454/4spd ott 373 posi 4/7 drop. 2000 s10 zr2 little blue truck that never gets stuck. '74 heald super bronc vt8. tecumseh powered moon rover. |
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01-18-2018, 10:52 PM
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#6 | |
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Senior Member
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,118
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Re: 72 350 Intake Manifold Bolts
Quote:
I haven't checked all of them yet, but I'm pretty sure a BBC uses 3/8-16 x 1.1/4 flange bolts. You know, with recessed heads. No washers. Only exception on a BBC is the A/C bracket that mounts to the intake. Based on my math and per the assembly manual, that bracket uses 3/18-16 x 1.3/4 regular hex bolts and lock washers............ I do not know if SBC is the same. Like someone mentioned, if they're too long you're screwed, pardon the pun.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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01-19-2018, 02:40 PM
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#7 |
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Registered User
Join Date: May 2011
Location: Fort Pierce, FL
Posts: 430
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Re: 72 350 Intake Manifold Bolts
I have the originals. Two are studs on the 4th inner from the front. Driver side has the oil fill tube brace on the stud and topped with a nut. The passenger side stud mounted the transmission controlled spark solenoid mounted to it. I find it odd that the right front needs the A/C adjuster bracket mounted, because that bolt goes through that bracket.
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