70 ls5 carb - Chevelle Tech
Engine AdvertisementGeneral Engine Discussion. Advertisement

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 16 (permalink) Old Yesterday, 5:23 PM Thread Starter
Tech Team
 
Join Date: Nov 2016
Posts: 60
70 ls5 carb

Does anybody know the correct carb part number for a 70 LS5 car,uto with AC
Thanks for any help
Remmag is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old Yesterday, 5:23 PM Thread Starter
Tech Team
 
Join Date: Nov 2016
Posts: 60
Damn spell check,that was auto with ac
Remmag is offline  
post #3 of 16 (permalink) Old Yesterday, 5:52 PM
Senior Tech Team
Eric
 
Join Date: Jan 2006
Location: SW Ohio
Posts: 1,256
Re: 70 ls5 carb

7040204

Carburetor Rebuild & Restoration
Engine & Driveline Parts & Services

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


Check out
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
on Facebook
Vintage Musclecar is offline  
 
post #4 of 16 (permalink) Old Yesterday, 6:16 PM Thread Starter
Tech Team
 
Join Date: Nov 2016
Posts: 60
Thank you sir
Remmag is offline  
post #5 of 16 (permalink) Old Yesterday, 9:14 PM
Lifetime Premium Member
Bob
 
Join Date: Mar 2005
Location: Jeannette Pa. near pittsburgh
Posts: 8,337
Re: 70 ls5 carb

1970 LS-5--Auto= 7040204
1970 LS-5--M-22= 7040205
You can also use a 7040202, Thats what I have on my 1970 Sta. Wgn. 468 driver.
My one owner -M-22 has the "05 " on it. You would have a FAIR chance on finding a "04 ". The 05s are getting hard to come by.
A restored 04 or an 05, Will be pricey.
Bob


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
1970 SS LS-5/M-22 El Camino- Org. Owner-AACA 2016-Senior Grand National Winner---MCACN-GOLD-2013
1970 ( FRAUD) SS 468 Station Wagon - Driver.
Robinls5 is offline  
post #6 of 16 (permalink) Old Yesterday, 9:22 PM Thread Starter
Tech Team
 
Join Date: Nov 2016
Posts: 60
Thanks for the info
I plan on getting me one over the winter
I am trying to get everything correct in my car
Thanks for the info
Remmag is offline  
post #7 of 16 (permalink) Old Yesterday, 9:35 PM Thread Starter
Tech Team
 
Join Date: Nov 2016
Posts: 60
If I could ask one other question.
My car has factory case iron manifold with replacement q jet set op for divorced choke
The rod and the part that bolts to the manifold is gone
I have found where I can get one but my question is
What heats the spring up to work the choke
Is it just heat from the intake or is there something else I am missing
Thanks for the help
Remmag is offline  
post #8 of 16 (permalink) Old Yesterday, 9:44 PM
Lifetime Premium Member
Randy
 
Join Date: Oct 2009
Location: Wisconsin
Posts: 887
Garage
Re: 70 ls5 carb

There is a heat passage in the intake that runs exhaust from one side head to the other. That's where the heat comes from to work that coil spring. The heat riser on the passenger side exhaust closes when its cold and directs the exhaust thru the intake.
redrocket1953 is offline  
post #9 of 16 (permalink) Old Yesterday, 9:45 PM
 
Join Date: May 2018
Posts: 2
The manifold heats the choke stove. I have a 202 I do not want. This morning I saw a 205 for 30 bucks on local Craigslist here, I think it’s gone, I’m looking..
67ss4spd is offline  
post #10 of 16 (permalink) Old Yesterday, 9:51 PM Thread Starter
Tech Team
 
Join Date: Nov 2016
Posts: 60
Ok dumb questions but please bear with me
Is the heat passage in the intake actually internal
Is there a hole in the intake where the heat escapes to let the heat go to the spring or does it heat the metal
Is the heat riser you are talking about the piece that sets between the exhaust manifold and the exhaust pipe
I do remember seeing that there
My car isn't here to look at or take pics of
In the body shop right now

Thank you all for your help
Remmag is offline  
post #11 of 16 (permalink) Old Yesterday, 10:03 PM Thread Starter
Tech Team
 
Join Date: Nov 2016
Posts: 60
I count two pics of the carb but can't attach ,I'm not sure why
Remmag is offline  
post #12 of 16 (permalink) Old Yesterday, 10:51 PM
Lifetime Premium Member
leo
 
Join Date: Oct 2003
Location: Southwest Florida
Posts: 13,089
Re: 70 ls5 carb

It heats the manifold under the choke spring, there should be a cover for the choke spring to keep the heat in, good luck!!

If you want to try to find an already to install carb, I recommend www.customrebuiltcarbs.com They can probably find and provide you with the correct one, good luck!!

Leo Paugh
Maryland Chevelle Club #017
A.C.E.S.#3731
progress has little to do with speed, but lots to do with direction

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
LeoP is online now  
post #13 of 16 (permalink) Old Today, 8:51 AM
Senior Tech Team
Eric
 
Join Date: Jan 2006
Location: SW Ohio
Posts: 1,256
Re: 70 ls5 carb

Quote:
Originally Posted by Remmag View Post
Thanks for the info
I plan on getting me one over the winter
I am trying to get everything correct in my car
Thanks for the info
Are you looking for a dated one?

If so, what's the build date of your car?

Carburetor Rebuild & Restoration
Engine & Driveline Parts & Services

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


Check out
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
on Facebook
Vintage Musclecar is offline  
post #14 of 16 (permalink) Old Today, 9:46 AM Thread Starter
Tech Team
 
Join Date: Nov 2016
Posts: 60
I am looking for one
Build date is first week of may 70
Thanks
Remmag is offline  
post #15 of 16 (permalink) Old Today, 3:04 PM
Lifetime Premium Member
Bob
 
Join Date: Mar 2005
Location: Jeannette Pa. near pittsburgh
Posts: 8,337
Re: 70 ls5 carb

Here is how the choke stove works. Your right side exhaust manifold has a " HEAT RISER " Its a hunk of iron with a butterfly and a spring. ( it is bolted between the R. Side exhaust manifold and the head pipe)When it is KOLD the butterfly is closed, This forces the engine exhaust from the right side to go through the exhaust crossover that is built in to the stock cast iron intake.
Now with all of this going on the exhaust heat ( going through the intake manifold) passing under and around the " COIL SPRING " inside the choke stove. As the coil spring get warm to hot it expands and unwinds, When this happens the coil spring inside the choke stove starts to MOVE the rod.
The rod that is being MOVED is attached to the Carb. butterflys.
When the butterfly is close or (cold engine). A closed butterfly will along with vacuum suck a lot of raw gasoline into the Q-Jet to keep a KOLD engine running.
When the engine gets warm enough to have the fuel " ATOMIZE with Oxygen "........... SCHZAAAAM the engine runs wonderful. YES a lot of parts to call it an automatic choke....... In the 30s--40s-50s you would find a knob under the dash, What did it do. This knob had a cable that was attached to the Carb. butterfly. This was a manual choke. With a manual choke you had to PUSH the knob "IN" after the engine was warm, If you forgot to do this the FREEKEN ENGINE would DRINK gas and not run for $H!t,,, you would get P!$$ed because you forgot to push the CHOKE KNOB in........
Bob
This message is about choking the engine not your chic---....


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
1970 SS LS-5/M-22 El Camino- Org. Owner-AACA 2016-Senior Grand National Winner---MCACN-GOLD-2013
1970 ( FRAUD) SS 468 Station Wagon - Driver.
Robinls5 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome