2024 Canadian Poncho Calendars are Now Available! CLICK HERE

 

 

Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: Another what is this thing question in my 70 Bon. engine bay ?


Poncho Master!

Status: Offline
Posts: 2530
Date:
Another what is this thing question in my 70 Bon. engine bay ?


 Hi evryone,

  I was wondering what is this or the purpose of that " black drum like thing " on the firewall, beside the underhood light behind the dual snorkel air cleaner ? Thanks

Attachments
__________________


Uber Guru

Status: Offline
Posts: 3630
Date:

/download.spark?ID=362325&forumID=118110
 If I have it correctly, that should be the vacuum resovoire? For vacuum controlled items such as the a/c-heater and cruise, if need be. It should have a small hose going to it from a vac source at the intake manifold.
 (Thanks to Mark for showing me how to enlarge pictures, I feel important!!)

-- Edited by 67Poncho at 11:58, 2008-11-09

-- Edited by 67Poncho at 11:59, 2008-11-09

__________________

Vincent Jr.



Uber Guru

Status: Offline
Posts: 3463
Date:

vacuum reservior, stores vacuum for instances of low engine vacuum(wot/climbing hills), keeps the hvac from defaulting to defrost mode when vac is low.

__________________

 








Poncho Master!

Status: Offline
Posts: 2530
Date:

Thanks guys !

__________________


Canadian Poncho Superstar!

Status: Offline
Posts: 10063
Date:

How does it store vaccume?

__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


A Poncho Legend!

Status: Offline
Posts: 48633
Date:

It likely has 2 hoses going to it, with one of them having a one way valve so that when the engine vacuum drops it doesn't lose the vacuum but keeps it supplied to the source as mentioned (defroster, cruise or whatever.)

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



Canadian Poncho Superstar!

Status: Offline
Posts: 10063
Date:

 Is it a bladder, a spring?

__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


Poncho Master!

Status: Offline
Posts: 2530
Date:

I removed it this afternoon and only one hose used to got to it, it has been disabled for some time ?

__________________


A Poncho Legend!

Status: Offline
Posts: 48633
Date:

I believe it is still a reserve for vacuum for heater, etc. but I forget how they do it with one hose on it.

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



Newbie

Status: Offline
Posts: 1
Date:

 

It's a vacuum reserve cannister that supplies vacuum to ac and heater.

when engine is under load with little or no vacuum.smile



__________________
Bill Collier


Poncho Master!

Status: Offline
Posts: 1833
Date:

It might only need one line. It stores just store vacuum like as air compressor reservoir stores pressure.

It could also have a check valve in it to prevent it losing vacuum when manifold vacuum drops. In that case, I'd expect it have one line connected to manifold (with a check valve in it) and a second line going to whatever system requires the vacuum.

__________________

_______________________________________
==|====|----B-E-A-U-M-O-N-T----|====|==

\__________________|________|____________________/

__\____O__________________|66BEAU|___________________O____/

Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.