overthehill

Looking for information on vacuum line connections at the round distribution block for heater and ac controls on my 66 Starfire. I would think that most 88 series of that year would be the same? Any help would be appreciated. Thanks

Charlie Jones

The 1966 Oldsmobile Chassis Service Manual will have the right answer to your question.
Service manuals are a good investment if you have an old car.
Originals are preferred over re-prints.
E-Bay has them;
1966 oldsmobile service manual for sale | eBay

joe_padavano

Specifically figure 1D-138 on page 1D-91 of the 1966 CSM.

overthehill

Thanks for the input. Ordered the chassis manual yesterday. I knew that's where the answer was, guess I was hoping someone would share the page with me so I could get that part of the car back together. Anyway, should have the manual in a few days.

BeenThere

Chances are that you will use the manual many times.

Charlie Jones

Here is an illustration of the vacuum lines from the parts book.
Hope this helps.
It is for 1965 but should work for 1966 if it is manual A/C. ( not "Climate Control ") the control valves are the same.
The parts book is available as a free download here;
1970 Oldsmobile Parts Illustration Manual (Chassis & Body) - ClassicOldsmobile.com

overthehill

Thanks for the diagram. Looks like the correct one. Going to run all new lines and see how it works.

overthehill

So I got the diagram from and received my chassis manual. Took the radio out for easier access to the circular manifold. Ran all new vaccum lines and hooked them up according to the diagram. Seems pretty straight forward. Inspected the mechanical controls and all looked good. Put vaccum to line. I can hear a slight vaccum leak at the controls and pushing the control buttons gives me very strange results. Mode door opens on vent, it should not. Defroster changes on heat button and it should not, etc. Been over the hose numbering several times. Any ideas?

overthehill

It's fixed