Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 19th December 2020, 03:35   #1
phenonix
Posted a thing or two
 
Rover 75 2001 Club Sedan V6 2.5

Join Date: Mar 2007
Location: Sydney
Posts: 1,458
Thanks: 18
Thanked 9 Times in 6 Posts
Default Cruise Control Actuator Vacuum Hose

According to Rave the cruise control actuator is meant to have a vacuum hose.
After recently doing a head gasket change (on another thread i have going) i don't know if i've lost this, or even it it originally had one?

Anyone know if i'm meant to have one, what does it actually do, and where do it connect to?
Thanks
Attached Images
File Type: jpg Actuator.jpg (137.5 KB, 24 views)
phenonix is offline   Reply With Quote
Old 19th December 2020, 09:44   #2
HarryM1BYT
This is my second home
 
HarryM1BYT's Avatar
 
75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD

Join Date: May 2010
Location: Leeds
Posts: 17,273
Thanks: 2,160
Thanked 2,061 Times in 1,586 Posts
Default

Quote:
Originally Posted by phenonix View Post
According to Rave the cruise control actuator is meant to have a vacuum hose.
After recently doing a head gasket change (on another thread i have going) i don't know if i've lost this, or even it it originally had one?

Anyone know if i'm meant to have one, what does it actually do, and where do it connect to?
Thanks
I don't have a V6, but I will make a guess - The vacuum pipe should run from that actuator, to the intake manifold. If you have disturbed the head, you will have disturbed this pipe.
__________________
Harry

How To's and items I offer for free, or just to cover the cost of my expenses...

http://www.the75andztclub.co.uk/foru...40#post1764540

Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing.

I've taken a vow of poverty. To annoy me, send money.
HarryM1BYT is offline   Reply With Quote
Old 19th December 2020, 09:59   #3
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,262
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by phenonix View Post
Anyone know if i'm meant to have one ...
If your car was factory fitted with cruise control then yes, you are meant to have one.
Quote:
Originally Posted by phenonix View Post
... what does it actually do ...
The vacuum hose carries vacuum from the vacuum pump to the actuator.
Quote:
Originally Posted by phenonix View Post
... and where does it connect to?
The vacuum pump which you will find at the rear RH corner of the engine compartment (as viewed from the front seats).

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 19th December 2020, 12:27   #4
COLVERT
This is my second home
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
Default

I have a diesel which has to have a vacuum pump.---I thought, like Harry, the petrol engines used the inlet manifold vacuum.---
COLVERT is offline   Reply With Quote
Old 19th December 2020, 13:09   #5
Teflon
This is my second home
 
Teflon's Avatar
 
Lagoon 2.0 V6 75 Conn SE Saloon

Join Date: Nov 2006
Location: Chertsey
Posts: 5,198
Thanks: 2,825
Thanked 2,920 Times in 1,570 Posts
Default

Quote:
Originally Posted by COLVERT View Post
I have a diesel which has to have a vacuum pump.---I thought, like Harry, the petrol engines used the inlet manifold vacuum.---
Nope, it's as Simon said, the pipe goes to a vacuum pump on the right hand side of the engine (down in the bowels of the engine bay).

Cliff
__________________


No. 4 of 6
Teflon is offline   Reply With Quote
Old 19th December 2020, 20:32   #6
phenonix
Posted a thing or two
 
Rover 75 2001 Club Sedan V6 2.5

Join Date: Mar 2007
Location: Sydney
Posts: 1,458
Thanks: 18
Thanked 9 Times in 6 Posts
Default

Any photo's or previous posts with photo's would be most appreciated of what it look like.
I'm having a search now.
I knew i had no hose's left over (bits and pieces) so i'm guessing the hose is still connected in the engine bay, i just need to re-connect it?
phenonix is offline   Reply With Quote
Old 19th December 2020, 20:35   #7
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,262
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by COLVERT View Post
I thought, like Harry, the petrol engines used the inlet manifold vacuum.
Hi Jon,

The vacuum pump ensures that the actuator is controlled accurately to maintain the pre-set road speed. Inlet manifold vacuum wouldn't work because it is directly affected by throttle position which would be adjusted by inlet manifold vacuum which would change the throttle position which would ...... you get the picture! It would be like a howl-round (acoustic feedback) at a rock concert!

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 20th December 2020, 02:56   #8
phenonix
Posted a thing or two
 
Rover 75 2001 Club Sedan V6 2.5

Join Date: Mar 2007
Location: Sydney
Posts: 1,458
Thanks: 18
Thanked 9 Times in 6 Posts
Default

Thanks for offering advice, easy fix, hose was in plain sight, i just missed it, was dreading i would have to go into the manifold again, luckily not, thanks again.
phenonix is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:34.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd