Quadrajet “slotted” throttle body gasket 1979 met 454

[anderso8623]

hi guys,

rebuilding the carb on my 1979 mercury 454. Motor is MIE 330 and serial number is 5226400, carb has a tag on it wit “MIE 330” and “1347-7366”. The kit came wit 2 throttle body gaskets. One is a standard four hole gasket and the other is essentially the same BUT has 2 slots between the primary and secondary bores. Two main questions: what one do I use? And what is the purpose for the slots.

Thanks!

 

[jimmbo]

Which of the two is the same as the old gasket? Are the slots Primary to Primary, and Secondary to Secondary, or Primary to Secondary?

 

[anderso8623]

The previous where not slotted but who knows who did it last. Slots are from primary to secondary. What I could find stated that it was for one of two things: marine application or higher heat car engines.

 

[anderso8623]

Here is the link to the kit, or at least a similar kit. It the two almost identical gaskets on the bottom. The one in the middle has the slots.

 

[Scott Danforth]

you use the one that matches the intake. if your intake has 4 holes, you use a gasket with 4 holes. if your intake uses 2 slots, you use the gasket with 2 slots.

 

[Lou C]

You could also go on the Cliff Ruggles Quadrajet site and ask on their forum.

 

[anderso8623]

Merc dealer said to us the non slotted gasket. Slotted has something to do with hot running engines. Not exactly sure.

 

[anderso8623]

Starting a new thread because not the engine won’t start! Ugh!

 

[Scott Danforth]

Starting a new thread because not the engine won’t start! Ugh!

Do not start multiple threads on the same topic. Its against the rules