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Exploded view of a Cadillac / Rochester carburetor

Reassembely video of a 1953 cadillac / rochester 4GC 4bbl carburetor

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  • 20 Answers

Check youe local libary, I am sure they have it to download for free.

Posted on Dec 11, 2012


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017

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SOURCE: secondary on my rochester quadrajet 4bbl wont open

It could be several things. It's quite possible that lack of use has made them hard to open. If that's the case then a little penetrating oil and some gentle persuasion will get them working. The top butterflies work on vacuum so you will have to push on them by hand.
It could be that the vacuum pot on the front passenger side of the carb is not working properly.It should connect by a short vacuum line to the top of the carb on the same side. Unplug the hose from one end, stick a finger over it so you don't lose vacuum. There is a long rod off the back of it that goes to the secondary's that should slide when you unhook and hook it back up.
The linkage on the driver's side should move the lower butterflies. Work the throttle linkage by hand, with the car off, and see if they will open. If they don't then liberally spray the linkage with something like WD-40 and work it back and forth. Spray both sides of the carb at the base and in the middle to lubricate the shafts for the butterflies. Work the linkage and spray and it should free up. Make sure that someone hasn't bent the tab that pushes the secondary's open, out of the way.
If the carb has been worked on lately, especially the choke linkage there are lockouts there. If the choke linkage has been taken off and put back on, these lockouts may not be in the right positions. There is a small tab that drops down when the choke is engaged but it can flop around if not correctly installed. You will need a diagram to get the linkage on properly. Most any rebuild kit for that age carb will have a picture of it.
These are your most likely problems. Hope this helps.

Posted on Aug 13, 2010

  • 2382 Answers

SOURCE: vacuum tube routing for Rochester

Hi, you can only get the vacuum tube routing for your 1972 Buick Skylark from the car repair manual because the it's not readily available online. You can get your car repair manual from Haynes Manual on 1-800-242-4637...

Posted on Mar 06, 2011

  • 693 Answers

SOURCE: simple post complete 4bbl adjustments

most of my experences they are like 10 oclock 2 oclock.

Posted on Mar 20, 2011

  • 2002 Answers

SOURCE: 1986 cadillac rebuilt rochester quadrajet

It sounds like whoever rebuilt the carb hooked the choke linkage up the wrong way. The mechanism can go together wrong and still fit. One of the pieces is a counterweight to trip the linkage off and it is likely in there wrong. It is usually painted green. The linkage will have to come apart and be redone. I've rebuilt a few and never had any luck finding a good diagram of how it is supposed to go together. There is one piece that has small steps on it, and when the choke is activated it is supposed to lock out the back barrels. The steps are what makes your engine rev higher when you try to kick it down. You have to play with it, put it together, close the choke and then trip the throttle. If it doesn't open try again. Sorry but hope this helps.

Posted on May 31, 2011

  • 12 Answers

SOURCE: need diagram for 2 barrel rochester carburetor

this site has manuals but you have to pay a few dollars for them

Posted on Mar 12, 2012

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Hey Anon,
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