Topic: Early 1967 289 vacuum advance line, rubber or steel??

[Hipo giddyup]

 Trying to figure out if the vacuum advance line on my 67' is supposed to be rubber hose or steel line?

Car info is as follows:

Nov. 17th 1966 built at  Metuchen NJ
289 V8 , 3 spd, 2V carb.

Thanks for any input!

[jwc66k]

It's a rubber hose.
Jim

[Hipo giddyup]

Thanks Jim. Any idea what lead to the change over?? I have a late July built 66' that I will also need to know if it should be rubber or steel. (Might as well ask while on the topic, even though its not a 67') I am curious when they started using the rubber hose compared to the steel line. Thanks!

[J_Speegle]

Thanks Jim. Any idea what lead to the change over??

Likely (just a guess) the introduction of the PVS - ported vacuum switches and the need to have the vacuum pass to and from those units

I have a late July built 66' that I will also need to know if it should be rubber or steel. (Might as well ask while on the topic, even though its not a 67') I am curious when they started using the rubber hose compared to the steel line. Thanks!

Steel all the way through the end of the production year by the examples I have (built much later than your car)

[jwc66k]

Likely (just a guess) the introduction of the PVS - ported vacuum switches and the need to have the vacuum pass to and from those units

I was told by a Ford service manager that it was easier to remove and plug a rubber hose than unscrew a fitting and plug that in doing a tune up.
I thought ported switches were started in 68.
Jim

[J_Speegle]

I thought ported switches were started in 68.

On many engines but in 67 they introduced the one that was built into the intake manifold heater hose elbow on 289's. Believe there is one older thread (added below) on the item. Hard to find and not many have seen one since they often rotted and were replaced by another style


http://www.concoursmustang.com/forum/index.php?topic=1364.msg6936#msg6936

[jwc66k]

Ah, found the diagrams in the 67 Engine Equipment Manual (AM0157, pg 233 2v, pg 235 4v) for the control port use. It is listed used on Mustang and Cougar 289 with thermactor (smog) and Air Conditioning.
On pages 231 is the diagram for a 289 2V - with and without thermactor standard transmission; A/T with thermactor that runs direct to the carburetor - no routing to the vacuum control port. Same on pg 234 for a 289 4v.
The A/C option is the key.
The strange diagram is on pg 232 showing a routing (289 2V and 4V), without the control port, that goes not to the carburetor but to the rear of the carburetor and picking up distributor vacuum from the intake manifold. Comments?
Jim

[Hipo giddyup]

Thanks for the detective work!  So just to confirm Jeff, it sounds like my car would have a steel line?

[67350#1242]

Never saw a steel line on 67's.   

[J_Speegle]

Thanks for the detective work!  So just to confirm Jeff, it sounds like my car would have a steel line?

You've mentioned two cars in this thread. Which one are you asking about?

- Trying to figure out if the vacuum advance line on my ....Nov. 17th 1966 built at  Metuchen NJ  289 V8 , 3 spd, 2V carb.


- I have a late July built 66' that I will also need to know if it should be rubber or steel

[Hipo giddyup]

Sorry, I need both answered and from what i have read earlier on it sounded as if my 67' mustang would have a rubber hose.

It's a rubber hose.
Jim

I was misreading your response for the 67'. So I take it my Dearborn built 66' coupe would have had a steel line, correct? Both cars are 289, 2v, 3spd
NO AC.


Then the final question is when did Ford change over from steel to rubber, since these cars are about 2 1/2 months apart yet different model years.
Thanks for a reply!

[Hipo giddyup]

I am trying to follow you on the introduction of the ported switch, even though my car did not come with one. I am guessing that the start of the 67' model year would have ended steel vacuum lines?

[J_Speegle]

.......The strange diagram is on pg 232 showing a routing (289 2V and 4V), without the control port, that goes not to the carburetor but to the rear of the carburetor and picking up distributor vacuum from the intake manifold. Comments?

If you compare Ford documents you will find that they conflict with how they did things at the plants in some cases. Have a chart that list 67 vacuum sources (unfortunately the chart does not say what the source is used for but most likely it would be for distributors) that shows (all cars)

- non-thermactor 67 289s  both transmissions (AC and non AC) should use the carb as a source

- non-thermactor 67 390s  with standard transmissions (AC and non AC) should use the carb as a source
- non-thermactor 67 390s  with automatic transmissions (AC and non AC) should use the intake as a source

Believe this was from a Shop Tips and likely in response to a change or an attempt to clarify something printed in another publication.
 
In practice I have pictures of a number of earlier cars with 289s & automatics  the distributor vacuum line run to the rear intake - with a preformed vacuum hose at the dist end, not just a bulk section of hose.








 At the same time I have examples built later in the year with the source at the carb so we may have found another 67 running change to add to the large long list for that year. Won't post any pictures of those since the thread is focused on early 67 289's

[J_Speegle]

.............. I am guessing that the start of the 67' model year would have ended steel vacuum lines?

For a 289 (they continued to use a solid tube attached to the vacuum advance on 6 cylinders) it does appear that the change was at the model year change over.  Just like other changes in the 289's between the years

[Hipo giddyup]

Thanks for the clarity Jeff. Guess I can take ownership on finding another "running change" in the 67' model year.