Vacuum pump question

[mtnbob]

I have the newer style vacuum pump. Installing my vacuum pump from old engine to new engine. Are there any gaskets or o-rings that i need to use. Some illustrations show a green o-ring and some show a seal at the end of the gear. Mine seems to have neither. Anyone run into this?

[theman53]

The older vac pump is a diaphram and has niether. The newer is a vane pump and has both. Some years had a different height oil pump and sometimes you run into issues with them not spinning the pump or not engaging the IM teeth.

If you are going from a vane to vane there are no issues and you vane pumps have both o rings.

[mtnbob]

I'm not seeing o-rings on the vacuum pump that came out of my 1.6 or on the one from my 1.6td. It almost looks like a seal is on the sealing edge of the pump where it touches the block, but it is not obvious and might just be part of the pump. I just keep seeing pics of the pump with a green o-ring.

[Dakotakid]

Yes, there is supposed to be an o-ring (nothing fancy) in that groove exactly where you are worrying about.

Take the pump to a hardware dealer or pump place and get some o-rings which will fit in the groove. Have a few on hand. Done....no more drama.

[libbydiesel]

You also MUST have the seal in the bottom of the gear and the oil pump with the hole in the shaft.  If not, the vacuum pump will not work.