VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1929-1932 Manifold Sleeves

Doing a valve job on my '29 head, we found the manifold sleeves (PN 362704) are very rusty. We're afraid parts of it may break off and get into the engine. The question is, can we cut off the sleeve, leaving the alignment ring, without causing any problems?

Thanks
ArtM

Your best bet is to purchase new ones.

New ones are the best bet, they are important to prevent manifold leaks.

Definitely install new manifold sleeves!!

I would be more than willing to install new sleeves if someone could tell me who sells them. I don't see them at the Filling Station or on Gary Wallace's site.

Thanks for the help.

ArtM

The filling Station:
INTAKE MANIFOLD ALIGN SLEEVE
206 216 CID & 1941-49 235 CID FS901 $6.50 per set of 3


INTAKE MANIFOLD ALIGN SLEEVE
235 & 261 CID - Set of 3 Sleeves FS902

Mack,
Those will not fit the '29 head. Maybe Skipper knows of a source?

The 1929 sleeves are a one year only application (no Mr. Mack, the 1929 Chevrolet did not have a 206, a 216, a 235 or a 261....it was a 194), and the sleeves are very hard to come by. The only sources that I can think of is either Gary Wallace (he has lots of stuff that is not listed in his catalog) or Don Rossi in Colorado.

Skip, If the sleeves were only used in '29, what was used in '30? Wasn't that the same head except for valve size?

ArtM

I am glad that you have them even if they are in bad shape.
Yep, I agree that anyone needing these alignment sleeves should try calling or calling those vendors, even if they don't have a set, they may know someone that does.


I knew that the 194 rings or sleeves are not mere rings. I have a part number in my 1929-1954 Chevrolet Master parts manual, also for the 30-31.
You can kind of view them online:

Group # 3.281 part number 362704 (set of 3) 1929
Group #3.281 Part number 362842 (set of 3) for 1930-1931
This is the link to the parts manual on Keith Hardy's site: Keith hardy parts manual
which is most helpful....

I found a set of '30 sleeves in good shape. We're going to use those. If there's any major disaster, I'll be back.

ArtM

I don't remember the differences year to year and passenger to truck. They should work on your '29.

Chipper,
The only truck sleeve in the parts catalog is for a '29 1 1/2T.
There is only one part number for the '30 and '31. It's different than the '29 but as you say it should work. We're going to try it and find out.

Thanks for the response.

ArtM

ArtM, could you take pictures of your reassembly? I would appreciate it very much. I'd like to see the sleeves and how they go in. When I removed and replaced my manifolds, I didn't find any so I didn't know to put any in.

I have checked several of parts books from that period.

Jan & Aug. '29 parts books list
Sleeve pn 835953.

Feb & Aug 1930 books list
Sleeve (set of 3) Series AC pn 362704
Series LQ pn 362705
Universal (1930) pn 835741

Feb & Aug 1931
Sleeve (set of 3) Series AC pn 362704
Series LQ pn 362705
Universal & Indep (1931). pn 362842

Feb & Aug 1932
Sleeve (set of 3) Series AC pn 362704
Series LQ pn 362705
Universal & Indep (1931) pn 362842
Confederate (1932) pn 836495

Feb 1933
Sleeve (set of 3) Series AC pn 362704
Series LQ pn 362705
Universal & Indep (1931) pn 362842
Confederate & Eagle (1933) pn 836495

So apparently there are at least 4 different configurations to the intake manifold sleeves.

Elderjames;


The top image is the sleeve. The bottom image shows the sleeve partly inserted into one of the intake ports in the head. The ring on the end aligns the manifold with the head.
Hope that helps.

ArtM

This is how one manual describes the sleeves.
"Sleeves in the inlet ports are an effective aid to distibution, equalizing the wet portion of the mixture and tending to return it to the air stream."

They extend well into the valve pocket area and direct the fuel air mixture to the furthest side of the valve better.

What the sleeves really do is provide a smooth passage for the fuel/air mixture to flow through. This helps keep laminar flow instead of turbulent flow. The more turbulent the flow of gas the lower the flow rate and higher the pressure drop. It is sorta like porting the head in that section.

Yeah!

I just pulled the sleeves out of 2 cylinder heads which i have, A 1931 and a 1932 and i could tell no difference between them.

They measured just under 3 3/8" (3.365") and the diameter measured at somewhere between 1.080" and 1.055"(slight oval) for the thin long tube part. with a metal thickness of .020".

The alignment sleeve on the manifold end is .390" long with a combined thickness of .085" ( including the .020" main tube thickness, so it is .065" or 1/16" thick), and the outside diameter is 1.205" to 1.195" (slight oval aswell) .
I have measured the best sample that i have.
Hope this helps someone to make some for their cars.

The 1932 manifold sleeves are completely different in configuration than the 1930-1931 manifold sleeves.

Well, i must have had 30-31 sleeves in my 1932 Head,They both fitted both heads which i have, a 31 and a 32.
What are the measurements for the 32-33 sleeves ??

I did notice that in the intake ports on the 1932 head , it had a slight groove on the lower port surface just in from the machined alignment ring recess.

I would have to get my 1932 sleeves out and measure them. However, the sleeve part behind the ring for 1932 is cut at a diagonal.

I do hope you mean-- get them out of your workshop storeroom??

Yes, I think that I have samples of each year in my parts stock so I am heading out to the shop now to see if I can find the sleeves and maybe get a photo as well.