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#1 |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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1975 350 intake manifold removal tips
I thought I would ask some of you guys with a lot more experience than I for any tips on removing/replacing the intake manifold on a 350. I am swapping a two-barrel carb out for a four-barrel Edelbrock carb. Also swapping intake manifolds.
Thanks for any help! |
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#2 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: 1975 350 intake manifold removal tips
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#3 |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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Re: 1975 350 intake manifold removal tips
Thank you very much!
What is the problem with the rubber seals? Thanks. |
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#4 |
Registered User
Join Date: May 2012
Location: South Ogden, Utah
Posts: 171
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Re: 1975 350 intake manifold removal tips
They should be named, "Never seals".
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'71 C/20 350/T350. |
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#5 |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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Re: 1975 350 intake manifold removal tips
Okay thanks!
I'll be sure to pickup some black silicone. |
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#6 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: 1975 350 intake manifold removal tips
Black RTV, sorry.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#7 |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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Re: 1975 350 intake manifold removal tips
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#8 |
Registered User
![]() Join Date: Oct 2011
Location: jackson michigan
Posts: 755
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Re: 1975 350 intake manifold removal tips
Make sure to mark your distributor before you remove it. Get the rotor back in the same position. Drain the coolent. You are going to get water and debris in oil so change it and the filter BEFORE you start the engine for the FIRST time. Mark your plug wires. Have fun and take your time you will do great.
Last edited by terry b; 05-08-2017 at 04:44 PM. |
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#9 | |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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Re: 1975 350 intake manifold removal tips
Quote:
Thanks again! |
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#10 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: 1975 350 intake manifold removal tips
If you don't you will require an oil change as well as all the coolant will go into the motor...
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#11 |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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Re: 1975 350 intake manifold removal tips
Okay. Thanks.
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75 Chevy K10 Custom Deluxe |
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#12 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,594
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Re: 1975 350 intake manifold removal tips
When you clean the old gaskets off use some tinfoil in the lifter valley. Poke it into the corners so it stays put. You'll catch all the debris that way.
Also keep track of which bolt holes which bolts came from. A few are shorter so they don't contact the pushrods when they're installed. |
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#13 |
Registered User
Join Date: Jun 2009
Location: COOKEVILLE,TN
Posts: 144
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Re: 1975 350 intake manifold removal tips
Mark your Distributor, very important !
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#14 |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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Re: 1975 350 intake manifold removal tips
Thanks for all the great tips! Should start the swap this evening.
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75 Chevy K10 Custom Deluxe |
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#15 |
Registered User
![]() Join Date: Sep 2015
Location: Mohnton pa.
Posts: 208
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Re: 1975 350 intake manifold removal tips
Just did this a few months ago on my 350 also. Watch a few you tube videos on replacing the manifold. I had vacume leaks and the intake did not aling properly, causing oil failed plugs on the drivers side. I had to remove the intake and start over again.
Buy a set of ARP intake bolts with the 7/16" heads, that way you can properly tighten the center 4 bolts by the carb. Besides silicone at the ends of the intake, a light coat around water jacket openings for the intake. I also covered both sides of intake gaskets with indian head sealer. Also a light coat of silicone around the bolts, to prevent additional vacume leaks. |
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#16 | |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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Re: 1975 350 intake manifold removal tips
Quote:
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75 Chevy K10 Custom Deluxe |
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#17 |
At the body shop.
Join Date: Aug 2009
Location: Land of fruits and nuts.
Posts: 5,211
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Re: 1975 350 intake manifold removal tips
Ultra gray rtv has been my go to
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" That didnt make it any newer " " Dont antique the equipment " |
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#18 |
Registered User
Join Date: May 2017
Location: Oregon
Posts: 9
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Re: 1975 350 intake manifold removal tips
Got the old manifold off and all of the old gasket removed. Ended up spending some time re-wiring some stuff while I was waiting for parts. I also checked in the glove box for what stuff was ordered from the factory. looks like its a 400ci, with a 400 turbo tranny (3.73). All of the steps were the same for the 400 as the 350.
Thanks again for the help!
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