1967 L30/M35 combo - should I have two carb return springs - Team Camaro Tech
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post #1 of 9 (permalink) Old Oct 8th, 16, 06:56 PM Thread Starter
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Jon
 
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Location: Northern Virginia
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1967 L30/M35 combo - should I have two carb return springs

Howdy all,

Trying to reassemble my car that I didn't disassemble.

In the AIM, UPC 6/D2 shows the one spring running from the coil to the 2 barrel carb for the 327/210.

UPC M35/A14.5 shows the "production spring" running from the coil bracket to the carb, and another spring running from the kickdown rod to the spark plug retaining tower. That has a specific part number for the L30 version of the spring. I cannot find the production spring by doing a part number search on the Google machine.

So, should I have two springs, and if so, should I just use two of the 390425 part numbers?

Cheers,
Jon

67 RS, 327/275, PG

Born Sierra Fawn on Gold, now Bolero Red on Gold

Not sure how many owners, but she's mine now...
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post #2 of 9 (permalink) Old Oct 9th, 16, 09:21 AM
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Al
 
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Re: 1967 L30/M35 combo - should I have two carb return springs

Jon, I believe the 2 springs are quite different. Posts 6 and 7 here show the throttle return spring on my 67 327/210 that I think is original. https://www.camaros.net/forums/18-eng...arb-parts.html
The 3904245 has a longer leg seen here.
1967 Corvette 327 with Powerglide Auto Lime Green Accelerator Spring Replaces GM 3904245

Al

my 67' build thread:
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post #3 of 9 (permalink) Old Oct 9th, 16, 09:49 AM Thread Starter
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Jon
 
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Quote:
Originally Posted by allanjs View Post
Jon, I believe the 2 springs are quite different. Posts 6 and 7 here show the throttle return spring on my 67 327/210 that I think is original. https://www.camaros.net/forums/18-eng...arb-parts.html
The 3904245 has a longer leg seen here.
1967 Corvette 327 with Powerglide Auto Lime Green Accelerator Spring Replaces GM 3904245
Thanks. I figured as much. Any idea where to find a replacement? As far as I can tell from trying to decipher the AIM, the spring in question is the same for 327/210 and 327/275, but the only 327 spring I can find anyone selling is the 3904245 for the kickdown linkage.

Cheers,
Jon
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post #4 of 9 (permalink) Old Oct 9th, 16, 10:22 AM Thread Starter
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Jon
 
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Re: 1967 L30/M35 combo - should I have two carb return springs

Do you suppose this one would work?

http://www.heartbeatcitycamaro.com/s...och-4bbl-1969/

67 RS, 327/275, PG

Born Sierra Fawn on Gold, now Bolero Red on Gold

Not sure how many owners, but she's mine now...
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post #5 of 9 (permalink) Old Oct 9th, 16, 11:35 AM
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Al
 
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Re: 1967 L30/M35 combo - should I have two carb return springs

Jon, That looks too long to me. HBC doesn't give the dimensions. Mine is 3-3/16" overall length. Body diameter is .55. Body length is 1-1/2". Long end is 1-7/16". Wire diameter is .04. I may have an extra.

Al

my 67' build thread:
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post #6 of 9 (permalink) Old Nov 14th, 16, 06:42 PM Thread Starter
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Jon
 
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Re: 1967 L30/M35 combo - should I have two carb return springs

Need a little help here folks -

Can anyone who has a 327/275 with a Q-Jet post a picture of their return spring setup?

I bought a spring from Q-Jet parts, but I can't for the life of me figure out how it should go on there. Using what the AIM shows for the 327/210 (which is obviously not what I have) only ends up holding the carburetor in wide open throttle, but in the L30 section it just mentions the production spring. So, is the only spring linkage for my application the one that hooks up to the kickdown rod for my PG?

67 RS, 327/275, PG

Born Sierra Fawn on Gold, now Bolero Red on Gold

Not sure how many owners, but she's mine now...
ScudRunner is offline  
post #7 of 9 (permalink) Old Nov 14th, 16, 07:46 PM
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Garth
 
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Re: 1967 L30/M35 combo - should I have two carb return springs

There should be one off the coil bracket too. I'm pretty sure it's the same as the L48 (SS350). I have this pic of Roger's 67 SS350 with powerglide. If you look close, there's a special bracket that mounts on the coil bracket.



Here's a pic of the "special bracket". I believe it's a one year only piece and hard to find if you don't have one.



It should be shown in the AIM, L30 section ? Hopefully Roger will chime in soon...

  • '68 RS, AA, 749, L30, M(uncie)20 (originally a 3spd), 15yr backburner resto........
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post #8 of 9 (permalink) Old Nov 14th, 16, 08:09 PM Thread Starter
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Jon
 
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Re: 1967 L30/M35 combo - should I have two carb return springs

Quote:
Originally Posted by Garfields Maro View Post
There should be one off the coil bracket too. I'm pretty sure it's the same as the L48 (SS350). I have this pic of Roger's 67 SS350 with powerglide. If you look close, there's a special bracket that mounts on the coil bracket.



Here's a pic of the "special bracket". I believe it's a one year only piece and hard to find if you don't have one.



It should be shown in the AIM, L30 section ? Hopefully Roger will chime in soon...
My coil bracket has a spot for a spring back there. I suspect my problem is that I'm hooking it up to the wrong place on the Q-Jet.

67 RS, 327/275, PG

Born Sierra Fawn on Gold, now Bolero Red on Gold

Not sure how many owners, but she's mine now...
ScudRunner is offline  
post #9 of 9 (permalink) Old Nov 15th, 16, 04:21 PM
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Vince
 
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Re: 1967 L30/M35 combo - should I have two carb return springs

ScudRunner,

I'm not trying to hijack your thread or anything like that. I just noticed in your posts that you mention your car was originally Sierra Fawn with a gold interior. That is a relatively rare color. Is your car a RS car too? I owned a '67 RS, Sierra Fawn with a gold interior with the L30 327 and a powerglide that I bought from the original owner in 1988 here in California. I sold it in 1994 also to a person living here in California. If this might be your car I could tell you a few things about it.
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