| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
03-09-2024, 08:17 AM
|
|||
|
|||
'78 Intake Adapter Plate ID
Need help identifying adapter plate on bottom of intake gasket for a ’78 400. I recently purchased this TA and now rebuilding the carb. Thin sheet metal with protrusions into the primary holes of the intake. It did peel off the gasket and I cleaned up both sides with 400 paper. Unable to find anything in the shop manual referring to this plate. Metal to metal with no sealant, doesn’t seem right for an intake. Thanks
|
|
#2
03-09-2024, 10:28 AM
|
|||
|
|||
|
The plate is related to the EGR or something like that on the intake, its factory correct. Cant recall if i used a gasket under mine or not & car is still in winter storage so cant look yet. Im sure others will confirm if it needs a gasket under it.
|
|
#3
03-09-2024, 10:55 AM
|
||||
|
||||
|
I do want to think mine was metal to metal on the intake gasket on top.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
|
#4
03-09-2024, 11:10 AM
|
|||
|
|||
|
That's a diverter plate used to evenly distribute the exhaust gas down the primaries when the egr valve was open.
It did not use a lower gasket. If sealing is questionable... a thin film of ultra copper will fix it right up. Clay |
|
#5
03-09-2024, 04:02 PM
|
||||
|
||||
|
Quote:
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
|
|
#6
03-09-2024, 05:33 PM
|
|||
|
|||
|
Thanks everyone. Now I get why it's there. I did put a very thin layer of Permatex. Picked up this 78 TA and a 78 formula for my retirement projects. Have to finish my 70 formula first. Thanks again.
|
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
