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#1 |
Junior Member
Join Date: Nov 2005
Location: Saint Francisville, Louisiana
Posts: 157
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Quadrajet Carburetor Rebuild
Is there anyone on this site that rebuilds Quadrajet 4 barrel carbs?
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1972 GMC K2500, stepside, stock 350, 4 speed. Former F/D truck with 32,000 miles, no rust. 1973 Jeep CJ 5, 304, 33's with side pipes 2008 GMC 2500HD, CC, SWB, D/A, SLT |
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#2 |
Registered User
Join Date: Jan 2007
Location: South Florida
Posts: 158
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Re: Quadrajet Carburetor Rebuild
I've rebuilt a few but it's been about 10 years since the last one. There pretty simple.
Rob |
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#3 |
Saving 1 truck at a time!
Join Date: Aug 2001
Location: Kent, WA
Posts: 6,465
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Re: Quadrajet Carburetor Rebuild
I've done a few...found the instructions pretty easy and basic. Make sure you have lots of clean table space (no kids, pets or wives around the area) and take your time. There is some excellent resources on the net as well as in the rebuild kit.
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'68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) |
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#4 |
Registered User
![]() Join Date: Oct 2007
Location: Fairfield, PA
Posts: 503
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Re: Quadrajet Carburetor Rebuild
I have rebuilt Quadrajets and had them rebuilt...I guess one of the questions is how many miles on you Quadrajet and why does it need a rebuild. If it is fairly low mileage then the throttle shafts should be ok. If it is a high mileage carb...the throttle shafts are probably worn and no matter how good you rebuild it as far as gaskets/getting everything back in the right place...Worn throttle shafts = vacuum leaks that you will chase forever.
Just another thought is the carbs are made out of pot metal and plated when new to protect the pot metal and eliminate any leaks in the pot metal. As these carbs age...the plating will were off. When this happens...you will chase all kinds of problems. If you want to get a professional opinion...Call Greg with Sparky's Carburators in Milwaukee, WI. His number is (414) 447-7500. He just rebuilt my Quadrajet off of my 75 Pontiac Grand Am 400 and it works like new...Not to mention the plating makes this carb look show quality. He is going to get my Quadrajet off of my 72 BB pretty quick and do the same thing. Cost is between $300.00 and $400.00...and well worth it. Quadrajets are the most underated carbs out there in my opinion. Good luck on whatever you decide...Alan |
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#5 |
Registered User
Join Date: Aug 2007
Location: Boise, Idaho
Posts: 676
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Re: Quadrajet Carburetor Rebuild
While were on Quads, I need to lean mine out a little, getting a black build up on the exhaust tips. Which needle screws do I turn and how far. Or basic start all the way in and how many turns out? Location and which ones. Or at least years ago I thought if the exhaust was turning your tips black it was to rich, is that true. Carb works fine other than that.
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#6 |
Registered User
Join Date: Dec 2006
Location: Idaho
Posts: 210
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Re: Quadrajet Carburetor Rebuild
Those screws only affect idle. You need to adjust the rods and/or jets to change off-idle mixture.
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72 C2500 LWB 402 Sierra Grande 05 Odyssey 08 Tundra |
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#7 | |
Gone to greener pastures
![]() Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
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Re: Quadrajet Carburetor Rebuild
Quote:
That's what makes them the most misunderstood & underrated carburetors. I could very well be wrong. It's been a LONG time since I messed with them.
__________________
'69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck |
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#8 |
Registered User
Join Date: Dec 2006
Location: Idaho
Posts: 210
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Re: Quadrajet Carburetor Rebuild
Nah, there are replaceable primary and non-replaceable secondary jets.
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72 C2500 LWB 402 Sierra Grande 05 Odyssey 08 Tundra |
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#9 |
Registered User
Join Date: Jan 2006
Location: Seattle WA
Posts: 505
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Re: Quadrajet Carburetor Rebuild
I'm gonna rebuild mine within the next month. I have Cliff's book, a rebuild kit, and new throttle shaft bushings. Based on a conversation with the guy who sold me the rebuild kit (The Carburetor Shop, Eldon MO, mentioned in the book), it should be pretty straight forward. Follow the instructions, take your time, take good notes.
He did mention that the throttle shaft bushings should be done by a pro. Luckily I live near Carburetor Connection. They said they can do them. They also mentioned that they'll rebuild the Quadrajet for 245. Nice to know that I have a backup in case I run into problems. I've done motorcycle carbs in the past, so I'm pretty confident this will go ok. Let's hope so ![]() |
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#10 | |
Gone to greener pastures
![]() Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
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Re: Quadrajet Carburetor Rebuild
Quote:
We're literally talking DECADES. Yeah. I'm that damn old.
__________________
'69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck |
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#11 |
Registered User
Join Date: Jun 2006
Location: Janesville, WI
Posts: 13
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Re: Quadrajet Carburetor Rebuild
What you need to do is buy a rebuild a kit and any other parts you need for your carb, then find a guy who knows how to do it and buy him a case of beer if he does it for you. Thats what I did and now my carb works great.
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__________________________________ 1969 GMC 3/4 Ton 4x4 - 350 4-Speed 2004 GMC Sierra 1500 4x4 - 5.3L Auto |
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#12 |
Registered User
Join Date: Aug 2007
Location: Boise, Idaho
Posts: 676
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Re: Quadrajet Carburetor Rebuild
Well mine has been excellent, starts right up, idles when it's very cold here in Idaho, like now! Touch the peddle it kicks down to a slower idle, no sputters or coughs, just think I"m running rich.
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#13 |
Registered User
Join Date: Dec 1999
Location: Mid NE USA
Posts: 2,212
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Re: Quadrajet Carburetor Rebuild
I just sent mine out last week to get rebuilt. Cliff Ruggles is where I sent it, he has written books on the Quadrajet. They are going to go through it completly, Bushings and everything new. Quoted price was around $370-$400.00. He tunes it according to what engine it will be going on.
I learned of him from this board. Ron http://www.cliffshighperformance.com/services.html
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Member #111 68 C-10 ![]() 70 ![]() 76 Jeep CJ-5 Help Support the Board: http://67-72chevytrucks.com/vboard/payments.php He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors. Thomas Jefferson |
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#14 |
Registered User
Join Date: Jan 2006
Location: Grand Jct.,CO
Posts: 59
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Re: Quadrajet Carburetor Rebuild
Sent mine to Sean Murphy Induction in CA. It made a huge difference in my roller cammed 462BB. Almost 3 week turnaround, but got my carb back & only $250.
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#15 |
Junior Member
Join Date: Mar 2007
Location: Hideaway, TX
Posts: 4,950
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Re: Quadrajet Carburetor Rebuild
I used SMI as well and was not that impressed. I am having a few issues.
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71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400 |
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#16 |
Junior Member
Join Date: Nov 2005
Location: Saint Francisville, Louisiana
Posts: 157
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Re: Quadrajet Carburetor Rebuild
I'm definitely not going to give it a try. I've tryed on small motors, (lawnmowers, weedeaters, ect) and have failed terribly. Always ended up sending them off or throwing them away. I will either send it off to get rebuilt or buy a remanufactored. Thanks for the reply. I would love to give the work to a board member, so if you are interested please pm me. Randy
__________________
1972 GMC K2500, stepside, stock 350, 4 speed. Former F/D truck with 32,000 miles, no rust. 1973 Jeep CJ 5, 304, 33's with side pipes 2008 GMC 2500HD, CC, SWB, D/A, SLT |
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#17 |
Junior Member
Join Date: Nov 2005
Location: Saint Francisville, Louisiana
Posts: 157
|
Re: Quadrajet Carburetor Rebuild
Oh yeah, the truck is my GMC 4x4 with about 35,000 miles. Not sure if it's been rebuilt before but probably not.
__________________
1972 GMC K2500, stepside, stock 350, 4 speed. Former F/D truck with 32,000 miles, no rust. 1973 Jeep CJ 5, 304, 33's with side pipes 2008 GMC 2500HD, CC, SWB, D/A, SLT |
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#18 |
Registered User
Join Date: May 2005
Location: PA
Posts: 2,696
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Re: Quadrajet Carburetor Rebuild
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#19 |
Senior Member
Join Date: Feb 2005
Location: Maynardville, Tn
Posts: 3,030
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Re: Quadrajet Carburetor Rebuild
You might PM JHow66, he has done them in the past.
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SEMA Network- Protect our Hobby! 71 C30 in pieces, starting to come together. Click here for A Place For Tennessee Truck Enthusiest To Meet |
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#20 |
Registered User
Join Date: Jan 2007
Location: South Florida
Posts: 158
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Re: Quadrajet Carburetor Rebuild
I agree 100% with My72BB.
Also, make sure you get it totaly clean. Rob |
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#21 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,923
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Re: Quadrajet Carburetor Rebuild
gman69 has done a few in recent years.
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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#22 |
Son of a gun
Join Date: Jan 2007
Location: Hot Springs, Arkansas
Posts: 1,636
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Re: Quadrajet Carburetor Rebuild
you can buy remanufactured q-jets at advanced and auto zone for $150. They work great right out of the box.
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Bill BEATERS ARE NEATER |
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#23 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: Quadrajet Carburetor Rebuild
i got mine for 140 from advance auto parts
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#24 |
Registered User
Join Date: Oct 2006
Location: Oshkosh, WI
Posts: 101
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Re: Quadrajet Carburetor Rebuild
I just recently rebuilt mine. The kit was $25 or so from Autozone. First time I've done any carb work - it wasn't bad at all. Only about 2 hours worth of work.
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#25 |
Registered User
Join Date: Aug 2007
Location: Boise, Idaho
Posts: 676
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Re: Quadrajet Carburetor Rebuild
Lot's to think about!!! I'm not sure how old mine is, well miage wise or if was rebuilt in the past. Not sure. I suppose they will ask for a core and at this point it seems to work or maybe I just don't know how a new or rebuilt one works. I know I only get about 10mpg driving it like my age @ 55, LOL. Other types? What's the smallest, efficient for a total stock 350? What CFM is the Quad? Would like a 500 CFM work. Daily driver here just around town no highway long distants.
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