First time replacing intake manifold gaskets

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

johnswie

Junior Member
Joined
Aug 19, 2023
Posts
17
Reaction score
2
Location
simi valley
First Name
john
Truck Year
1978
Truck Model
c10
Engine Size
350
You must be registered for see images attach

Does anybody know what this is called or what it does? It was on my intake but nothing attached to it.
 

75gmck25

Full Access Member
Joined
Oct 13, 2016
Posts
2,033
Reaction score
1,826
Location
Northern Virginia
First Name
Bruce
Truck Year
1975
Truck Model
K25 Camper Special TH350 NP203
Engine Size
5.7
It’s part of the hot air choke on a Quadrajet. The choke mechanism has a couple small tubes that connect to that device, and it pulls air through it to heat and operate the choke.

It’s not needed if you have an electric choke. IIRC, my Edelebrock intake came with a choke block-off plate for the fitting on the intake.
 

pnwnvrdn

Full Access Member
Joined
Nov 23, 2021
Posts
131
Reaction score
219
Location
Grays Harbor County, Wa
First Name
Todd
Truck Year
1986
Truck Model
Silverado K10
Engine Size
SBC
I use Fel-Pro intake gaskets...throw away the black rubber front and rear seals and run a bead of Permatex RTV silicone gasket maker instead.

Distributor timing has already been covered, I will add though, it really isn't as scary as it may seem.
 

Randy and Easton

Full Access Member
Joined
Feb 6, 2021
Posts
884
Reaction score
1,244
Location
North Richland Hills, Texas
First Name
Randy
Truck Year
1976
Truck Model
C-10 LWB
Engine Size
350
Easton used no gaskets front or back just permatex “right stuff” and it’s been perfect going on 2 years
 

Attachments

  • image.jpg
    image.jpg
    148.1 KB · Views: 15

Snoots

Full Access Member
Joined
Jan 23, 2013
Posts
8,175
Reaction score
16,002
Location
Georgia
First Name
Roger
Truck Year
1973
Truck Model
Jimmy Sierra
Engine Size
350
You must be registered for see images attach

Does anybody know what this is called or what it does? It was on my intake but nothing attached to it.
Wanna sell it? I'm sick of my electric choke.
 

silverbackreef

Junior Member
Joined
Mar 18, 2023
Posts
14
Reaction score
22
Location
FL
First Name
Dude
Truck Year
1986
Truck Model
C10
Engine Size
305
Make sure you mark cylinder 1 wire on the cap and you know the firing order so the wires go back on in the right places. Rotor turns clockwise.

I got a couple wires swapped on mine recently. Motor ran, but ugly. I'm always amazed at the resilience of these motors when I make a mistake like that.

Invest in a timing light w/ tach and dwell, and a vacuum gauge. You won't be sorry.

Read all the articles on this page that refer to timing, vacuum, and distributors: https://www.corvette-restoration.com/how-to-articles/

Look forward to hearing your progress. Mine has evidence that PO used _way_ too much RTV and probably needs to be cleaned up.
 

Jawzjeep

Honk if parts fall off
Joined
Jun 5, 2021
Posts
442
Reaction score
821
Location
Washington
First Name
Joshua
Truck Year
1991
Truck Model
Suburban
Engine Size
350
OP, when I was first learning my old man taught me to write information on the inside of my hood. That way I could pop the hood anytime and be able to see firing order, the rotation of the distributor, part numbers for oil filters and oil capacities and other specific information if I forgot. It was very helpful in the beginning. A light coat of clear over it will make it stay longer.

Also, silver Sharpies show up on black parts really well
 

Radiohead

Reducing tire diameter 1000 revolutions at once
Joined
Mar 17, 2022
Posts
1,813
Reaction score
5,902
Location
Low Earth Orbit
First Name
Eric
Truck Year
MCMLXXIX
Truck Model
C-20 Silverado Camper Special
Engine Size
454 crazy cubes, or 7.4 luscious litres
I use a white paint pen to write on the black NAPA gold or Wix oil filter ends the date and mileage it was installed. This has helped me to remember when.
 

johnswie

Junior Member
Joined
Aug 19, 2023
Posts
17
Reaction score
2
Location
simi valley
First Name
john
Truck Year
1978
Truck Model
c10
Engine Size
350
It’s part of the hot air choke on a Quadrajet. The choke mechanism has a couple small tubes that connect to that device, and it pulls air through it to heat and operate the choke.

It’s not needed if you have an electric choke. IIRC, my Edelebrock intake came with a choke block-off plate for the fitting on the intake.
Ah, that makes sense! Thanks for the info.
 

johnswie

Junior Member
Joined
Aug 19, 2023
Posts
17
Reaction score
2
Location
simi valley
First Name
john
Truck Year
1978
Truck Model
c10
Engine Size
350
Make sure you mark cylinder 1 wire on the cap and you know the firing order so the wires go back on in the right places. Rotor turns clockwise.

I got a couple wires swapped on mine recently. Motor ran, but ugly. I'm always amazed at the resilience of these motors when I make a mistake like that.

Invest in a timing light w/ tach and dwell, and a vacuum gauge. You won't be sorry.

Read all the articles on this page that refer to timing, vacuum, and distributors: https://www.corvette-restoration.com/how-to-articles/

Look forward to hearing your progress. Mine has evidence that PO used _way_ too much RTV and probably needs to be cleaned up
Wow lots of great articles in there! This should help a lot
 

johnswie

Junior Member
Joined
Aug 19, 2023
Posts
17
Reaction score
2
Location
simi valley
First Name
john
Truck Year
1978
Truck Model
c10
Engine Size
350
So everything is finally hooked back up. The biggest issue I seemed to have was that I couldn’t properly fit a socket in between some of the valleys on the intake. I torqued the bolts done as well I could with a smaller wrench, but not sure if it’s to spec. The bolts came off pretty easy, so I feel like I had it tighter than before. Anyways, after an oil change I started it. Ran rough and had a new loud sound I couldn’t identify. Like a loud tick? Adjusted the timing. Seemed to idle well but still the loud noise. After warming up it seemed to go away. But comes back once in gear. Drove it very briefly and seemed to drive fine. Any ideas what this could be? Maybe this will go away (wishful thinking)? I’d post a video if I could
 

hogdaddy

Full Access Member
Joined
Jan 12, 2023
Posts
119
Reaction score
225
Location
Alabama
First Name
mike
Truck Year
1986
Truck Model
Scottsdale
Engine Size
350
Hopefully you didn't drop anything inside. I can't imagine a tick from an intake change. Check your plug wires and distributor cap is on correctly.
 

Latest posts

Forum statistics

Threads
42,013
Posts
907,442
Members
33,511
Latest member
sbrannan
Top