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#1477738 Tue Dec 06 2022 02:01 AM
Joined: May 2022
Posts: 23
Mike34 Offline OP
New guy question. Piecing together and rebuilding 1955 235 for my 1955/2 shortbed pickup. I have an intake and exhaust manifold from a 1954. My understanding (to date) is that it is the same fit/function.
See attached photo and arrow pointing to "something". I wasn't able to locate what it might be in the 55-59 Assembly manual or 1955 shop manual. Maybe only on pre '54s? Your help/knowledge is appreciated.


Attached Images

1955 Chevy 2nd Series 3100 Stepside, 235cid
Joined: Sep 2010
Posts: 1,531
That is for a thermal spring that closes the flap valve when the engine warms up

Attached Images
BD90974A-6152-4A2F-8120-A208BA992168.png (157.41 KB, 79 downloads)
Joined: Jan 2022
Posts: 512
The stud that the arrow points at is the attach point for the end of the manifold heat control thermostat spring.

Joined: Jun 2011
Posts: 4,788
Make sure and tighten the inter manifold bolts first before the head bolts!


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Joined: May 2022
Posts: 23
Mike34 Offline OP
Thanks. There is nothing left of the stud, so it will need to be replaced. Is it a screw in or press in and are they available? Things are in the tear down phase, so theses manifolds need to be disassembled, shot peened, studs replaced And ensure that the flap valve is in working order too,….before assembly. Thanks for the pointer on the inter manifold bolt tightening,…before installing.


1955 Chevy 2nd Series 3100 Stepside, 235cid

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