Buford

Identify year of intake/exhaust manifold - straight 8

Recommended Posts

Somewhere along the way I've picked up a straight 8 manifold and don't remember what year it's from. It's two piece rather than the 3 piece that my '50 Roadmaster has and has the part #1338252-2 on the intake and #1313674-3 on the exhaust (see pictures). Any help identifying it would be appreciated.

 

Alan

post-138769-0-53447800-1439396962_thumb.

post-138769-0-11338700-1439397010_thumb.

post-138769-0-89453000-1439397055_thumb.

post-138769-0-53008800-1439397127_thumb.

Share this post


Link to post
Share on other sites

According to my parts book, the intake manifold number matches '50-'52 series 40 and 50, and '53 series 40

Share this post


Link to post
Share on other sites

Thanks retirednow. I didn't realize that the smaller straight 8 used a 2 piece rather than a 3 piece manifold. I know the 3 piece is the one prone to cracks in the exhaust side but I'm not familiar with the likelihood of cracks in the 2 piece. The one I have doesn't seem to have any so perhaps it will be of some interest to someone if I post it for sale.

 

Thanks again,  Alan

  • Like 1

Share this post


Link to post
Share on other sites

Retirednow is correct. Notice that the carb mounting area has 4 bolts. This indicates this is for a 263 cubic inch engine whereas a 3 bolt carb mount would be for the older 248 engine.

Joe

Share this post


Link to post
Share on other sites

Retirednow is correct. Notice that the carb mounting area has 4 bolts. This indicates this is for a 263 cubic inch engine whereas a 3 bolt carb mount would be for the older 248 engine.

Joe

 

 

  Not so. I do not know when the 248 got 4 bolts, but for sure 1950 does. The manifold will Fit any 248 and 263. With exception of the earlier ones that the engine sat level, then the exhaust would still fit.

 

  1950 was the last 248, in the 40 series. The first 263 in the 50 series. 

 

  Ben

Share this post


Link to post
Share on other sites

Thanks Joe and Ben for your replies. I've got to admit not knowing Buick had three engines for 1950; 248, 263, and 320. Now that I know what my extra manifold fits, that leaves the Roadmaster only that has the three piece manifold which apparently is the only one prone to cracking.

Alan

Share this post


Link to post
Share on other sites

Thanks Joe and Ben for your replies. I've got to admit not knowing Buick had three engines for 1950; 248, 263, and 320. Now that I know what my extra manifold fits, that leaves the Roadmaster only that has the three piece manifold which apparently is the only one prone to cracking.

Alan

 

   The 320, I believe, always had the three piece [ plus preheat valve box ] and the center section is prone to crack. The 248/263   [ '50 was the ONLY year for both]   is a one piece plus preheat box. They, too, are prone to cracking and warping. The preheat valve box will also crack. I have one cracked into three pieces.

 

  Ben

Share this post


Link to post
Share on other sites

First Born:

Thanks for correcting me on the carburetor mounting holes for the 248 vs 263. I never knew Buick sold both engines in 1950. On the 248 intakes that I have seen there is a boss and a hole near he front of the intake manifold for the long bolt to hold the air cleaner in place. On the 263 intake the air filter crosses over the valve cover to the other side of the engine.

Joe

Share this post


Link to post
Share on other sites

 Joe, my 248 air cleaner mounts like the 263. I believe the 320 mounts parallel to the engine and has the boss on the manifold. Perhaps some of the earlier year 248's also. My memory is not what it was. I owned a 1948 Super when it was just an old car. about 1958. It would have had a 248. In fact, I overhauled {bearings and rings} but do not remember.

 

  Ben

Share this post


Link to post
Share on other sites

Ben:

I had a 48 Special with the 248 and it had the boss with a hole between the first sand second intake ports and the air cleaner was parallel to the engine. My 53 Special has the 263 and the air cleaner crosses over the top of the valve cover.

Joe

Share this post


Link to post
Share on other sites

 The manifold will Fit any 248 and 263. With exception of the earlier ones that the engine sat level, then the exhaust would still fit.

 

  1950 was the last 248, in the 40 series. The first 263 in the 50 series.

1939 was the first year of the stepped manifold

Share this post


Link to post
Share on other sites

rh - Sorry for the long delay in replying but my wife passed away in October and I haven't been back on the forum until now. Yes, I still have the manifold if you're still interested.

 Alan

Share this post


Link to post
Share on other sites
Guest
On 8/15/2015 at 8:34 PM, 1939_Buick said:

1939 was the first year of the stepped manifold

Good catch! It's a combo. Early, pre 1939 exhaust, and later, 4 bolt carb intake. Why did they change to the stepped intake for 1939? Makes it a little taller, but Speedway sells 3 to 4 bolt adapters if needed to accommodate whatever carb you choose. 

Share this post


Link to post
Share on other sites
2 hours ago, 2carb40 said:

Early, pre 1939 exhaust, and later, 4 bolt carb intake. Why did they change to the stepped intake for 1939?.. 

 

1939 exhaust manifolds/heads do not have a lug/stud at no. 8 cylinder. Theory was it was too close to the firewall.

 

1938 and before the crankshaft was horizontal to the ground. 1939 & later the crankshaft is at an angle to the ground so lower the drive shaft.

 

 

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now