Intake manifold

[Whiteshadow89158]

Hey everyone, I bought a new intake manifold awhile back and I'm starting to buy new sensors for my car. Well I have two holes in the front of the manifold so my question is, what goes in those holes? Do I simply plug them or do sensors go there?

 

[JohnZ]

Hey everyone, I bought a new intake manifold awhile back and I'm starting to buy new sensors for my car. Well I have two holes in the front of the manifold so my question is, what goes in those holes? Do I simply plug them or do sensors go there?

What intake manifold did you buy?

 

[Whiteshadow89158]

Edelbrock performer 2101. Someone informed me that one of the holes should be occupied by a temperature sensor and to just plug the other hole.

 

[bugs1962]

1st of all are you using the stock carb? If so,the stock CCC (computer command control) requires a coolant temp sensor for the system to operate correctly. I installed a 2101 on my car about 8 years ago.However,it only came with 1 hole (left side of intake) and it was to big for the sensor. On top of the intake in the front was a boss to drill and tap for an extra sensor. I had to drill a 37/64 hole and use a 3/8" NPT pipe tap. If you are not using a stock carb than just plug both holes. My guess is the one hole you have is 3/8" NPT and your sensor (if needed) will fit in that one. I've got pictures of mine to share if needed.

 

[bill81vette]

:hijackbugs1962...welcome to CAC!!!!
hope you enjoy our forums...
be sure to check the L-81 registry and register your '81.....
if you so desire,stop in the new member introductions and introduce your self...
hijack over

 

[bugs1962]

:hijackbugs1962...welcome to CAC!!!!
hope you enjoy our forums...
be sure to check the L-81 registry and register your '81.....
if you so desire,stop in the new member introductions and introduce your self...
hijack over

thanks Bill...I'll do that

 

[Peer81]

As said the first one (big hole) is for the ECM coolant sensor, the smaller second hole is for the EGR or EFE vacuum sensors if I'm correct.

Greetings Peter

 

[Whiteshadow89158]

Well I have two holes on top of the thermostat housing for the egr and efe sensor but then I have an extra hole on each side of the housing. I'm assuming the temp sensor goes on the left side and I just simply plug the right.

 

[Peer81]

Yes, plug the drivers side and the temp sensor goes into the passengers side.

Greetings Peter

 

[bugs1962]

both those holes look bigger than 3/8 npt (the thread size of your ecm coolant temp sensor). I had to drill and tap that boss area next to the right hole.

 

[TimAT]

I don't know how yours is setup, but often the hole on the right is tapped for a 1/2" pipe thread and gets a nipple for the heater hose. Temp sensor is usually between cyl 1 and 3 in the left head. Some had another sensor between 6-8 on the right for a fan temp sensor. EFE and EGR went into the t'stat housing.

 

[Peer81]

both those holes look bigger than 3/8 npt (the thread size of your ecm coolant temp sensor). I had to drill and tap that boss area next to the right hole.

I think you're right on the spot, sorry for my misleading post! I couldn't find a picture to check it but the right hole is for the heater return and the temp sensor is somewhere in the middle in a smaller hole.

Greetings Peter