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Quadrajet rebuild!

D

Dango

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Ive never rebuilt a carburetor, Ive got the kit for my carburetor I know the components of one but have no experience with rebuilding one. Mine is overflowing fuel and I dont know what it would be, im guessing my float is sticking but does anyone have any suggestions or really good resources that I could use to rebuild this carb correctly?:D
 
It does sound like a float problem.

One of the big set backs with trying to rebuild an old worn out Quadrajet is the throttle shafts. The throttle shaft bore gets worn out, and vacuum leaks occur. Also, with the extra play in the throttle shaft, it causes the primary butter flys to stick the throttle partly open, thus casing eradic idling. Just throwing a basic rebuild kit at a worn out Quadrajet usualy does nothing to fix it,

One of the best cures for an old worn out Quadrajet is to replace it with a new carburater. I know it costs more, but it is the only complete fix there is, short of spending the same amount of money to pay an expert to restore your old Quad to new.

The Eldelbrock Performer (read Carter) carb is a good and reasonbaly priced carb, if you shop around. But they totaly suck if you plan to do any hard core off roading.
 
If there are carb shops around, they can probably fix the primary throttle shaft. Local place (last I had them do one, years back) was $40. Parts to do the first one would probably cost just as much, if you plan on doing more in the future, buy the parts and do it yourself.

As mentioned, I've not had one apart that didn't have SOME play in the primary throttle shaft. Worst I have seen was on my '83. Bad enough that idle wasn't consistent because the primary throttle plate bound up as the throttle was let off.
 
Alot of the time you can find local guys who can work magic on those carbs also HP books has a book on the its a good read. I redid mine and it worked awesome.

IMHO the quad is one of the best carbs ever
 
dyeager535 said:
If there are carb shops around, they can probably fix the primary throttle shaft. Local place (last I had them do one, years back) was $40. Parts to do the first one would probably cost just as much, if you plan on doing more in the future, buy the parts and do it yourself.

As mentioned, I've not had one apart that didn't have SOME play in the primary throttle shaft. Worst I have seen was on my '83. Bad enough that idle wasn't consistent because the primary throttle plate bound up as the throttle was let off.
Click to expand...

It can be hard to find anybody that knows about "bushing" a Quad carb throttle shaft anymore.

Last time I tried to find somebody who knew how to do this (1988), most of them had no idea what I was talking about, or lied and said "yea, I can do it", but obviosly had no clue what they where talking about, when I qizzed them on how they would do the job.
 
I was probably spoiled then, these guys used to be just down the street from me. Two primary throttle shaft bushings were $5, which I did myself.

http://www.carburetion.com/

They've got a good parts selection online, that's for sure. :)
 
I stopped rebushing quadrabogs at work years ago... just wasn't worth it, you where married to that focker after that... I can buy a remanned marine version for $300...

I usually have a couple good, used throttle plates kicking around to swap in if need be......
 
When you've got a lot of overhead (business) remanning carbs is probably not cheap.

Yourself, you could do the whole thing for well under $100 for the first one (including bushing), and all subsequent would be under $50. Drill bit for the bushings ("J" IIRC) was the most expensive piece.

Rebild kits are still under $30, if you were lucky and no bushing was required you'd have a pretty cheap and easy rebuild. Can't see what they do to reman them that I can't do...I doubt they mill them flat.
 
it just becomes a cost effective thing for us at work... same as long blocks now.. doesn't pay for me to assemble bottom ends at the price we can buy em for... I can be earning billable money elsewhere...

at home, absolutely....
 
If the bushing situation is ok, You need to purchase a new float for the carb. It is best to remove the existing float ( there is a code number on the float ) and replace it with the correct one. The bushings and float were the worse problems with the Q-jet.
 
Thanks that really helped me out, Ive got a guy whose been working on them for a long time and hes showing me the process of rebuilding one. I will deefinitrly ask him about the throttle bushing and see if it needs replacement, as for the float, it is in good shape but the needle was not attached correctly. It wouldnt seat properly causing it to flood. And the guy who had it before me put alot of other stuff in backwards:doah:so we've been correcting those mistakes as we took it apart. so far it looks good just a bunch of junk in it. Ill keep yall posted and ask if i come into any more problems.
Thanks!:o
 
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