TexasGunner

I broke this port/ sensor when I was hosting my motor. I snapped it off the intake manifold. I tried searching for it at work and can not find it. Is it two parts in one? I can find the vacuum port switch. But what is the electrical part on top?

BlackGold

Olds started using that in 1971. It combines the TVS and TCS functions of 1970. I'm not sure what they called it. Someone else will post here and tell you and whether replacements are available. NOS would cost a fortune.

dc2x4drvr

I might have one in stock, but unless you're doing a restoration, plug the hole and hookup vacuum from carb to vac advance, and hide the plug.

Fun71

Yes, that switch is the early attempt at reducing emissions. It prevents distributor vacuum advance until the engine is up to operating temperature and the transmission is in high gear. While this reduces emissions, it also reduces performance. Do as dc2x4drvr posted; save some money and let your engine perform better.

Allan R

It's called the TCS switch. Write up in the 71 or 72 CSM covers it. Used on both 350 and 455 engines those years. This part is not reproduced. I have spares out in the shed. I could be talked out of one of them for the right price.

TexasGunner

So...since the motor has a new electronic distributor I really have no need for this part? I can just plug up the hole.

MDchanic

Exactly.

Use a regular pipe thread plug.

- Eric

TexasGunner

Thanks for all the info and help guys.

joe_padavano

FYI, these parts are not reproduced and restorers are looking for them. Non-destructive removal will mean dollars in your wallet should you decide to sell one.

BILL DEMMER

i just happen to have one laying around...


bill

TexasGunner

I actually found one on a old edlebrock intake. Taking it off is going to be a problem. It will not budge a bit.

Allan R

2 things:
1. Use some penetrating fluid and soak the base of the TCS (gently tap the base area to help it sink in)
2. Heat the intake around the TCS, don't heat the TCS. It should break loose fairly easily this way.

TexasGunner

^^^ Thanks I will