General Category > Quadrajet Carb Talk and Tips

Buick qjet

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Cliff Ruggles:
They made "37" rods that were not "B" suffix.  The "B" series tapers slightly on the upper section then again more quickly down to the .026" tips.  I use and prefer them in the early APT models.

Later rods would be stamped 37 with a J, or K after the number (they may have made others) and they are shorter than the early style.......Cliff

mcx:
Cliff...thanks for the info, I really like this site..I ordered your book today from Amazon, it's a used version which is perfect for this qjet!...i have been cleaning it up and trying to follow the paths within to understand it better....I figured out the idle air bypass from base plate to airhorn, it was a little confusing till I finally noticed those notched out sections in the primary air horn bores(pretty cool to see how the air gets around the closed throttle plate)....I also tried pulling out a idle tube, not pretty ,but at least I know what size it's tip is down there, .032. to .033ish to purchase.....I checked out the APT in the base plate, it's capped off still..is that APT set screw the same size as a mixture screw?.  Thanks, Mike

Cliff Ruggles:
We make and sell an external APT screw with a spring on it to hold it's adjustment.  We also have everything you would need to set up that carb exactly for any particular application, have done thousands of the Buick units over the years and know exactly what they need to be up to par for any set-up......Cliff

mcx:
I had much better luck removing the second idle tube, it came out so nice it could probably be reused LOL....I made a effort to remove the base plate APT..drilled the apt cover and it came off easy...apt was soaking for a day and used map gas to heat it up....that screw is  fused permanent..screw head ended striping..than tried drilling out the whole screw...no luck , than moved on to the Dremel cutting disk to slice a channel....its a cluster fcuk!!..i quit!!!   I ended up using JB Weld Marine putty and sealed the damage up..frustrating..but at least its back to where it was originally.

Cliff Ruggles:
Those screws are often case hardened.  They can be difficult to drill out and easy to break the "ears" off as well.

I'm close to 100 percent successful at removing them, but I get more practice than most!

To drill them out you have to "pierce" them with a really sharp/hard punch.  The insides of the screw are relatively soft and once the drill bit gets a good start they drill out pretty easily......Cliff

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