Carburetor to Manifold Gaskets
Posted by Joe On 2023/7/7 21:49:02
Hey all,
Quick vehicle info - 1950 2302-5, 327, Carter WDO-643SA
Alright, been diving down a rabbit hole. My carburetor is coming back from the rebuilder for some warranty work, and I have my freshly milled and torqued from the inside-out intake/exhaust manifolds hung and ready to go.
I hopped on here and utilized the handy search feature to look for questions pertaining to this topic and came across the Service Counselor that mentioned two different types of gasket material used on either side of the insulator, and those sometimes getting switched, leading to swelling of the gasket and blocking of the "vacumeter passage."
Fast forward - I have my two new "BEST" gaskets and a NOS insulator (that has all four layers, instead of the three with cracks my old one had). Given that a. the new gaskets don't seem to match the description in terms of materials used/construction of what Packard ended up supplying as replacements for their carburetor/manifold gaskets, and b. the surfaces of the new gaskets are either flat (the side with text on it), or sort of puffy (solid gray):
1. Are there different gaskets that should be used than those supplied by BEST?
2. If it matters, what is the correct orientation of the gaskets relative to the insulator (text sides facing the insulator, or text sides facing the metal surfaces)?
3. Perhaps the bigger curiosity, I took some pictures with the throttle body of my parts carb (also a WDO... not sure if it's a 643SA, but this setup is the same on my carb) with the new gaskets. The blue arrow points to the starter switch passage that is only partially obstructed by the gasket. The screen and check ball are at the end of the passage. Should this passage be partially open like this? The red arrow points to the vacumeter passage and how it looks with the gasket; there is a machined passageway that I would guess is enough, but wanted to confirm if any modification of the gasket was necessary.
Basically just want to make sure what I have is correct and make sure I'm using best practices for attaching the carb to the manifold.
Thanks, everybody!
Joe
Attach file:
20230707_220837.jpg (374.71 KB)
Screenshot_20230707_214312_Firefox.jpg (175.15 KB)
20230707_220936.jpg (307.43 KB)
20230707_220913.jpg (329.19 KB)
20230707_221428.jpg (322.71 KB)
Quick vehicle info - 1950 2302-5, 327, Carter WDO-643SA
Alright, been diving down a rabbit hole. My carburetor is coming back from the rebuilder for some warranty work, and I have my freshly milled and torqued from the inside-out intake/exhaust manifolds hung and ready to go.
I hopped on here and utilized the handy search feature to look for questions pertaining to this topic and came across the Service Counselor that mentioned two different types of gasket material used on either side of the insulator, and those sometimes getting switched, leading to swelling of the gasket and blocking of the "vacumeter passage."
Fast forward - I have my two new "BEST" gaskets and a NOS insulator (that has all four layers, instead of the three with cracks my old one had). Given that a. the new gaskets don't seem to match the description in terms of materials used/construction of what Packard ended up supplying as replacements for their carburetor/manifold gaskets, and b. the surfaces of the new gaskets are either flat (the side with text on it), or sort of puffy (solid gray):
1. Are there different gaskets that should be used than those supplied by BEST?
2. If it matters, what is the correct orientation of the gaskets relative to the insulator (text sides facing the insulator, or text sides facing the metal surfaces)?
3. Perhaps the bigger curiosity, I took some pictures with the throttle body of my parts carb (also a WDO... not sure if it's a 643SA, but this setup is the same on my carb) with the new gaskets. The blue arrow points to the starter switch passage that is only partially obstructed by the gasket. The screen and check ball are at the end of the passage. Should this passage be partially open like this? The red arrow points to the vacumeter passage and how it looks with the gasket; there is a machined passageway that I would guess is enough, but wanted to confirm if any modification of the gasket was necessary.
Basically just want to make sure what I have is correct and make sure I'm using best practices for attaching the carb to the manifold.
Thanks, everybody!
Joe
Attach file:
20230707_220837.jpg (374.71 KB)
Screenshot_20230707_214312_Firefox.jpg (175.15 KB)
20230707_220936.jpg (307.43 KB)
20230707_220913.jpg (329.19 KB)
20230707_221428.jpg (322.71 KB)
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