Vacuum Hose Routing
Thread Starter
Racer
Joined: Jan 2005
Posts: 370
Likes: 77
From: Perth Western Australia
Vacuum Hose Routing
Does anybody know if it matters which way the vacuum hoses are placed onto the ports on the headlight switch?
One instruction sheet I have shows the hose coming from the engine going to the rear port and then a hose from the front port going to the override valve.
Another set of instructions shows the engine vacuum hose going to the headlight switches front port and the override valve from the rear port.
I'm currently installing the upper dash pad and when in place it would be difficult to swap the hoses over if I have them wrong.
I also cannot start the engine at the moment to check its operation.
Thanks.
Brad
One instruction sheet I have shows the hose coming from the engine going to the rear port and then a hose from the front port going to the override valve.
Another set of instructions shows the engine vacuum hose going to the headlight switches front port and the override valve from the rear port.
I'm currently installing the upper dash pad and when in place it would be difficult to swap the hoses over if I have them wrong.
I also cannot start the engine at the moment to check its operation.
Thanks.
Brad
Drifting
Joined: May 2008
Posts: 1,647
Likes: 5
From: Roseville CA
It does matter. The PO of my 71 had them backwards and they didn't work. I had to pull the dash just to swap the hoses. I believe the blue hose from the override switch connects to the front (toward front of car) port. I would double check before closing up the dash.
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
With Pete's picture and this one you should be able to figure it all out. Just remember the source hose is the rear nipple on the headlamp switch.
Team Owner
Joined: Sep 2006
Posts: 31,301
Likes: 4,390
From: Westminster Maryland
Hi,
The 71 AIM drawing, (and the one Pete posted, but his notes corrected), does show the blue striped hose going to the wrong port on the headlight switch.
The 71 Chassis Service Manual shows the correct position.
Blue stripe.... front port.
Willcox shows the correct routing.
It's caused problems for more than a few people!!!!
Regards,
Alan
The 71 AIM drawing, (and the one Pete posted, but his notes corrected), does show the blue striped hose going to the wrong port on the headlight switch.
The 71 Chassis Service Manual shows the correct position.
Blue stripe.... front port.
Willcox shows the correct routing.
It's caused problems for more than a few people!!!!
Regards,
Alan
Last edited by Alan 71; Jan 27, 2012 at 02:24 PM.
Thread Starter
Racer
Joined: Jan 2005
Posts: 370
Likes: 77
From: Perth Western Australia
Thanks everyone for the replies.
I followed the first set of hose routing instructions and fitted the vacuum source to the rear port.
I would of hated to have to remove the dash again if I had them wrong.
Brad
I followed the first set of hose routing instructions and fitted the vacuum source to the rear port.
I would of hated to have to remove the dash again if I had them wrong.
Brad
