I'm rebuilding a '72 455. This is off my old intake manifold. Is it a TVS? It's simply a hollow tube that was connected to the carb and the heater control valve. Thanks. (hope I uploaded the pic right)

 

just a plain old vacuum tree...

 

thanks. I hadn't heard of it. this is my first rebuild and first pre 80's car.

 

I can't say that I've ever seen a vacuum tree like that from the factory on any 1972 Olds motor.

 

Thanks Joe. The motor was in a '79 TA I bought a few years ago. Decided to rebuild it and keep it in the car.

Like I said, I'm new at this but I haven't seen anything like this in all the on-line investigating I've done. The old intake had a heater control valve but the car is non-AC. The new manifold is an Edelbrock Performer. There is a hole behind the carb that it fits in but I'm not really sure what it's for or if I even need it.

 

It was likely transferred from the original 403 when the engine was swapped. It's simply a multi-port vacuum tap. Nothing fancy. If you need that many vacuum taps, use it. Otherwise, don't.

The heater control valve likely came on the swapped engine. Without A/C you can get rid of it, but replace it with a correct nipple with a restrictor in it, not a hardware store part.

 

thanks. at the risk of broadcasting my lack of knowledge, is that nipple w/ restrictor something i have to special order? if so, from where? i don't know what it looks like.

 

SEARCH is your friend:

https://classicoldsmobile.com/forums...ater-core.html

 

Thanks again Joe. I'll remember that.

 

Looks like something we passed around the campfire back in the 70's