Good day. I have a vacuum leak at the carb mounting gasket. I ordered what appeared to be the replacement, which is the Fel-Pro 1904 1/4 thickness. Unfortunately it is a different then what is there now. I then looked at summit racing and what they recommend is a paper Fel-Pro 60024 gasket. Looking at the one from summit, it does appear to be the right one as it has the same groves as the intake manifold. The one I have on there now does not have any grooves, just the four port openings for the carb. Not sure which one I should be looking for. Any recommendations greatly appreciated. I attached a picture of the actual gasket that is on there now. Thanks
Apologies. 1967 GS400, stock engine. It is the Rochester Quadrajet, not sure of number, but I attached pics of the carb.
Ok...yeah...I see...I have a 67 GS400, the gasket is kind of a weird deal. Does your car definitely have the original stock manifold?
Great question... I am not sure as I am the second owner. Original owner was a gear head and really wanted this car to track it but never got it to where he really was a happy camper. I believe it is even bored over to 405 or 407. Need to go back to my notes. Attached are pics of the manifold
The original gasket looked something like this. There's a matching metal plate you either need or should have. The thing that makes it different is the cutout in the gasket for the heat riser. Your manifold should have that area cut out in it. http://www.oldbuickparts.com/product_info.php?products_id=8059
Right, it is like a shield. I'll post a pic here. It's possible your heat riser has been blocked at the head(s). I didn't check your manifold #, but it looks about right. The carb looks about right, also. No way to know about the jets and rods, etc. Now you can see why I asked for the additional info before. There's a ton of Q-jet gaskets, and you can't just be tossing any gasket on it, because sometimes they may leak. https://www.ebay.com/itm/400-401-42...332449171348?_trksid=p2385738.m4383.l4275.c10
Just to show a member here sells them also and to verify the above is correct. https://quadrajetparts.com/quadrajet-steel-shim-heat-shield-buick-1966-cadillac-1967-p-1114.html https://quadrajetparts.com/quadrajet-base-gasket-thick-buick-1966-p-98.html
Do you have numbers on that carb? Looking at your fuel line I am thinking it’s a Chevy quadrajet. Gasket shouldn’t be different I would think
That's definitely an early qjet. It has the place on the side for the round id number placard but looks to be missing. Its also missing the tab over the choke rod that ive only ever noticed on 67 gs 400s. I assume it's there to prevent interference with the star wars air cleaner.
I think the tab you are talking about is the secondary lockout lever. Many people like to just take them off...because...I don't know why they take them off! It's a good thing and if adjusted right it's never going to give anybody any trouble. There's plenty of clearance for the breather.
Frank i tried to upload a pic of it but ikeep gettin an error msg. I dont see how it has any affect on the secondary operation as it only shrouds the upper choke flap arm in the air horn section of the carb. The upper secondary blades work fine with it in place
I hate to steal this person's thread. Geez' Chris...that's really an interesting piece. I don't have one on my car, and never seen one before. I think I've got more than one carb, too. It almost looks like that piece holds the base on. Like you put the base on, then the bracket. I'm pretty sure there was a retainer for the hold down nut, so maybe there was a retainer for the base to keep it on the carb. Maybe Gary knows? Or Nick? Thanks for posting that!
It doesnt hold the base. It is all contalined inside the air horn and the outer edge of the tab sits in a notch in the top of the carb. Ive only seen em on 67s with the star wars breather. I did a google search and the hemmings article with the red car has it also. My car was a mostly original 42k mile car when i got it so presumably thats why its still there. I bet most of the brackets got tossed when carbs were rebuilt.
