[1969danscoupe]

Im going threw the car and have always noticed that right where the water neck is, is a post that comes up off the intake with 3 ports on it?? There is nothing hooked up ur capped off? Should I try to find a plug to plug it or cap it off?

[Print Dad]

Hello 1969danscoupe,
The port thing is a thermal vacuum switch.
It was used with smog systems and probably went to the
distributor (retard portion of a dual chamber vacuum advance).

I would simply cap all three ports even though the port is not used.
The way the switched worked was it would heat up and open other ports.

Here is a pix I took from another post and modiifed.


Print Dad

[1969danscoupe]

yep thats it so just cap off the ends? I wish there was a bolt to just put inplace you know. Thanks again this board rocks!

[Print Dad]

Hello,
I am sure you could pull it and take it to a pluming supply house and they would have a cap but why chance stripping or breaking anything.

Good Luck....... Print Dad

[Jonk67]

As printdad said you can get it at most any hardware store, HD, Lowe's etc. in the plumbing section, should be NPT thread, it's a pipe plug (bring the old one if you can, want to say it's 1/2" NPT?).
Jon