Author Topic: sixpack gasket question  (Read 830 times)

Offline 70RTdroptop

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  • 1970 Challenger R/T 440-SixPack
sixpack gasket question
« on: June 07, 2015 - 05:37:53 PM »
So, I was digging through some car stuff, found a carb rebuild kit that I don't remember having. Got it from some guy on ebay, I think. Anyway, got everything cleaned up on the center carb, gaskets fit perfect, holes lined up like they're supposed to. Outboards... not so much :(. I've attached some pictures so you can see what I've got going here. First pic shows the outboard disassembled. Second pic shows the old and new gaskets. On the new gasket are some black dots - those indicate a hole in the old gasket, as well as the corresponding hole in the carburetor body. The new gasket doesn't have that "D"-shaped cutout, either, just a small 1/4" hole. So, here are  my questions - do I need to get an exact match for the old gasket, should I punch holes in the new gasket, or don't I have to worry about the holes in the carb body that would be covered up if I use the new gasket? Or does that metal plate, which fits on top of the blue gasket, render all those questions irrelevant? The other gaskets are fine, by the way, it's just those blue ones that are giving me a problem.
I don't know who rebuilt the carbs previously, so I don't even know if the old gaskets are the correct ones.
On another note, I've read posts that reference outboard carb jets. Where the heck are they?! I'm probably missing something really simple, but for the life of me, I can't find them! :swear:
Anyway, thanks for the help!

1970 Dodge Challenger R/T 440-6 convertible
1966 Ford Mustang convertible  - numbers matching (wife's car )




Offline 72ls5fla

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Re: sixpack gasket question
« Reply #1 on: June 07, 2015 - 06:52:37 PM »
the jets are the metal metering plates you unscrewed from the carb body.
only the center carb had a metering block with jets and power valve.

there are #s stamped on the outer metal part indicating size etc..


as for the gaskets - that i am not 100% sure about.
I would take the carb and old/new gaskets to a speed shop (or someplace that knows Holleys inside out) and ask them.

Good luck ...
Bill

Offline 734406pk

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Re: sixpack gasket question
« Reply #2 on: June 07, 2015 - 08:23:14 PM »
The gasket with the D shaped hole is for the primary (center) carb. The cut out is for the power valve. The outboard carbs don't use power valves. I'm not sure about the other holes, but they may be for the vacuum diaphragms. You want to be certain to use the correct gasket and not block any needed passages. The center carb uses a different gasket from the secondary outboard carbs.
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive

Offline jhaag

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Re: sixpack gasket question
« Reply #3 on: June 08, 2015 - 11:20:24 AM »
both of those gaskets are wrong. the metering plate uses a gasket the same size as the plate, as seen in the first photo. The bowl gasket is a separate gasket, that seals only the bowl. get the correct kits!

actually a little research shows that gasket may work, but you still need the metering plate gaskets.

go here and look at the exploded view:   http://www.chicagocarburetor.com/carburetor-parts.php?c=2354

 





« Last Edit: June 08, 2015 - 06:59:14 PM by jhaag »
love 70 Challengers