How hard is it to rebuild a qjet? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 10-27-2004, 10:19 PM

How hard is it and what tools would I need to rebuild a qjet?

Thanks

Cheesewagon · 10-27-2004, 11:02 PM

I don't think their that hard to work on. But here is a Great book that I picked up to get me started.: Rochester Carburetors , by Doug Roe. If you know just what info your looking for I could copy it at work and snail mail it to you.

Latter, Tom.

cableguy0 · 10-27-2004, 11:09 PM

not hard at all just toss it in the trash and get a holley

but seriously just like anything else if you get a good rebuild kit and pay attention as you take it apart or better yet get a book they are easy

Brainchild · 10-27-2004, 11:19 PM

Pretty easy to work on.All you need is a screwdriver,and some needlenose pliers,and the correct kit to replace everything.And a bunch of carb cleaner.

Car Craft article might help.
All the Q-Jet info on the net I didn't look through this one,hope it helps

jimfulco · 10-27-2004, 11:24 PM

And a 1/16" roll pin punch for the accelerator pump arm.

Fred T · 10-27-2004, 11:31 PM

Kits are easy to install, but the Qjet has a problem with throttle body wear where the shafts go through. If the wear is excessive, you have a vacuum leak. Here's how to check the wear.

The design specification was a clearance of 0.004 ~ 0.006 inch (4 thousands to 6 thousands) as measured by a dial indicator from the throttle shaft to the throttle body in a direction perpendicular to the shaft. In practice, the "break-point" is 0.009 inch. If the wear is 0.009 or less, leave it alone. 0.010 or greater, install bushings.

Thanks to CarbKing on the Stovebolt Board for the specifications

skokie · 10-27-2004, 11:54 PM

Quote:

Originally Posted by Cheesewagon

I don't think their that hard to work on. But here is a Great book that I picked up to get me started.: Rochester Carburetors , by Doug Roe. If you know just what info your looking for I could copy it at work and snail mail it to you.

Latter, Tom.

Think I found it.
http://www.amazon.com/gp/reader/0895...36#reader-link

10-27-2004, 10:19 PM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,325	How hard is it to rebuild a qjet? How hard is it and what tools would I need to rebuild a qjet? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

10-27-2004, 11:02 PM	#2
Cheesewagon Senior Member Join Date: Jan 2002 Location: Perrysburg, Ohio, USA Posts: 409	I don't think their that hard to work on. But here is a Great book that I picked up to get me started.: Rochester Carburetors , by Doug Roe. If you know just what info your looking for I could copy it at work and snail mail it to you. Latter, Tom. __________________ '91 suburban 350 TBI - R 700 4 new daily driver '72 Cheyenne Super 49,000miles 350/350 frame up resto w/ matching numbers.

10-27-2004, 11:09 PM	#3
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	not hard at all just toss it in the trash and get a holley but seriously just like anything else if you get a good rebuild kit and pay attention as you take it apart or better yet get a book they are easy __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-27-2004, 11:19 PM	#4
Brainchild Still drivin' a Rat Rod Join Date: Sep 2004 Location: Monett Missouri Posts: 4,925	Pretty easy to work on.All you need is a screwdriver,and some needlenose pliers,and the correct kit to replace everything.And a bunch of carb cleaner. Car Craft article might help. All the Q-Jet info on the net I didn't look through this one,hope it helps __________________ Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the a$# 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website

10-27-2004, 11:31 PM	#6
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Kits are easy to install, but the Qjet has a problem with throttle body wear where the shafts go through. If the wear is excessive, you have a vacuum leak. Here's how to check the wear. The design specification was a clearance of 0.004 ~ 0.006 inch (4 thousands to 6 thousands) as measured by a dial indicator from the throttle shaft to the throttle body in a direction perpendicular to the shaft. In practice, the "break-point" is 0.009 inch. If the wear is 0.009 or less, leave it alone. 0.010 or greater, install bushings. Thanks to CarbKing on the Stovebolt Board for the specifications __________________ Fred There is no such thing as too much cam...just not enough engine.

10-27-2004, 11:24 PM	#5
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	And a 1/16" roll pin punch for the accelerator pump arm.



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