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Username Post: 217 leaking exhaust-intake manifolds        (Topic#369904)
Posts: 13

Age: 69
Reg: 08-03-21
10-30-22 06:16 AM - Post#2849253    

Can anyone shed some light on the 217 intake and exhaust manifold? Mine is leaking on the intake side by the block. as I look at it, I see a rectangular gasket looks like it separates the 2 manifolds. I had a guy tell me there is a spring-loaded butterfly valve in the exhaust manifold for temperature control. Is there an exploded view available to look at? Is it necessary to open it up or could I just replace the intake-exhaust gaskets? Any help appreciated.


"6th Year" Platinum Supporting Member
Posts: 437
Age: 75
Loc: Neosho, MO.
Reg: 04-01-18
10-30-22 06:38 AM - Post#2849257    
    In response to STOKER1948chevy

There is a Gasket between the Intake and Exhaust Manifolds, but, this would not be a Vacuum leak, because this is just for exhaust gas to heat the intake manifold. The Intake and Exhaust connections are made with Three metal rings, that fit into the head, and intake manifold, to align them and a metallized gasket that seals them. The Butterfly, should move freely with your finger, and be spring loaded.
I have ran the six, with the rings, and without them, with silicone and everything from Indian Head shellac, to permatex 1 and 2, and also without sealant, and could not see any difference other than them holding the manifold up a little while installing the bolts. Also ran these sixes with, and without the Butterfly, and noticed very little difference.

1952 Styleline Sedan, 62-235, Drum brakes, Manual steering, 2" Drop, 8-60 AC, Glass packs, Two Carbs, and a Cast Iron PowerGlide-
Way out behind the Old School

Half a Dozen in a Row, all it needs for Her to go.

Rusty Heaps 
Posts: 140

Loc: Knoxville,TN
Reg: 06-29-11
11-06-22 06:02 AM - Post#2849702    
    In response to gcrkfrd

Don’t listen to the auto parts store when they tell you it’s a 217, it’s really a 216. A 216.9 but Chevrolet didn’t round up the number.

I invest my money in precious metals, mostly rust!

Posts: 13

Age: 69
Reg: 08-03-21
11-28-22 07:01 AM - Post#2850633    
    In response to Rusty Heaps

got the gaskets, took it apart, and got it back together and back on the engine. Decided to send the carb out to be rebuilt by goofing off an letting time go by have drained the gas tank and will have to wait till spring to see if it all works. Those metal rings are helpers installing the gaskets.


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