Got the Q-Jet from Junkyard: Have MANY questions... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TIMSPEED · 04-16-2004, 06:10 PM

First off, I pulled this NICE Q-Jet off a 77 FullSize Chevy van with the 350/Th350 combo. The carb is untouched (by junkyard hands at least). My question is...it LOOKS like it's a MECHANICAL secondary...but I haven't seen a Q-Jet in a while. Am I missing anything, and if I am, what is it? Also, what kit should I get for the rebuild?
Here's the pics...

TIMSPEED · 04-16-2004, 06:11 PM

2

TIMSPEED · 04-16-2004, 06:12 PM

3

TIMSPEED · 04-16-2004, 06:13 PM

4

TIMSPEED · 04-16-2004, 06:14 PM

This is the number on the Secondary throttle blades.

TIMSPEED · 04-16-2004, 06:14 PM

Here's the number on the top, side of the mainbody.

TIMSPEED · 04-16-2004, 07:52 PM

OK, I've deduced that I'm missing the Secondary throttle linkage. Also, the part # on the carb is 17056502, with 0706 AAD under it. Which I've found the carb to be off a 76 Chevy California Chassis. So, my carb is almost date correct! Nice!

**swervin ervin** · 04-16-2004, 09:07 PM

Yep it's missing the air valve pulloff linkage. It's not a mechanical secondary. No Q-jets were. The air valves are what is controlled by vacuum.

TIMSPEED · 04-16-2004, 09:26 PM

Quote:

Originally posted by swervin ervin
Yep it's missing the air valve pulloff linkage. It's not a mechanical secondary. No Q-jets were. The air valves are what is controlled by vacuum.

Can't I make the linkage with a piece of metal coathanger or something?
I didn't THINK any Q-Jets were MS's, but it's been so long since I seen a QJet, I couldn't tell...Any recommendation on gasket/rebuild kit or anything? Also, can you tell me what vacuum ports are what, and what idle screws are what...

**swervin ervin** · 04-16-2004, 09:34 PM

Quote:

Originally posted by TIMSPEED

Can't I make the linkage with a piece of metal coathanger or something?

Not really. I would find one off another junkyard carb. We, (I) don't rig carbs around here. Must be a Cali thing.

As for the kit, just get one at Autozone or Advance etc. They are all pretty much the same. The float don't come with the kits. You will need to buy this seperate.

TIMSPEED · 04-16-2004, 10:00 PM

Quote:

Originally posted by swervin ervin
Not really. I would find one off another junkyard carb. We, (I) don't rig carbs around here. Must be a Cali thing.

Can you show me a picture of the linkage, so I know what I'm looking for.
And, what KIND of QJet is this? 4MV or M4ME?

**swervin ervin** · 04-16-2004, 11:01 PM

Here's the rod that is on my 1904. It's green. This is the one used if you only have a primary vacuum break, which yours looks to have.

As far as what type it is. Not sure. Looks sort of like a M4MC. It don't have any electrical connections going to it, right?

**swervin ervin** · 04-16-2004, 11:02 PM

Oops. Forgot the pic.

*1972C10* · 04-16-2004, 11:06 PM

I betcha i have that linkage ive tore apart a biziillion q jets in the conquest for smaller jets and have since wound up with alot of parts.

If you build that carb ditch the hot air choke and put the electric there Ive done it before just plug that hole in the front and bolt the electric part down The outer housing will accept it just the same.

76HighSierra · 04-17-2004, 11:16 AM

Tim, I should have that piece laying around in my shop. PM me your adress and I'll send one to you.

04-16-2004, 06:10 PM	#1
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	Got the Q-Jet from Junkyard: Have MANY questions... First off, I pulled this NICE Q-Jet off a 77 FullSize Chevy van with the 350/Th350 combo. The carb is untouched (by junkyard hands at least). My question is...it LOOKS like it's a MECHANICAL secondary...but I haven't seen a Q-Jet in a while. Am I missing anything, and if I am, what is it? Also, what kit should I get for the rebuild? Here's the pics... __________________ I have a few cars... See Them Here

04-16-2004, 06:11 PM	#2
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	2 __________________ I have a few cars... See Them Here

04-16-2004, 06:12 PM	#3
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	3 __________________ I have a few cars... See Them Here

04-16-2004, 06:13 PM	#4
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	4 __________________ I have a few cars... See Them Here

04-16-2004, 06:14 PM	#5
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	This is the number on the Secondary throttle blades. __________________ I have a few cars... See Them Here

04-16-2004, 07:52 PM	#7
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	OK, I've deduced that I'm missing the Secondary throttle linkage. Also, the part # on the carb is 17056502, with 0706 AAD under it. Which I've found the carb to be off a 76 Chevy California Chassis. So, my carb is almost date correct! Nice! __________________ I have a few cars... See Them Here

04-16-2004, 09:07 PM	#8
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Yep it's missing the air valve pulloff linkage. It's not a mechanical secondary. No Q-jets were. The air valves are what is controlled by vacuum. __________________ Mike 1985 Chevy C-10

04-16-2004, 11:01 PM	#12
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Here's the rod that is on my 1904. It's green. This is the one used if you only have a primary vacuum break, which yours looks to have. As far as what type it is. Not sure. Looks sort of like a M4MC. It don't have any electrical connections going to it, right?

04-16-2004, 11:02 PM	#13
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Oops. Forgot the pic.

04-16-2004, 11:06 PM	#14
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	I betcha i have that linkage ive tore apart a biziillion q jets in the conquest for smaller jets and have since wound up with alot of parts. If you build that carb ditch the hot air choke and put the electric there Ive done it before just plug that hole in the front and bolt the electric part down The outer housing will accept it just the same.

04-17-2004, 11:16 AM	#15
76HighSierra DAMN, I love Big Blocks! Join Date: Aug 2003 Location: New Mexico, USA Posts: 619	Tim, I should have that piece laying around in my shop. PM me your adress and I'll send one to you. __________________ Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear.



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