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1

Omega General Help / Re: Coolant loss

« on: 08 September 2010, 09:19:47 »

Definitely start with the HBV - had two fail on me. The first would empty the header tank several times over 10-15 miles but then everything seemed to seal up with heat and it would run a distance without problems. Access to change it is 'interesting', to say the least.

2

Omega General Help / Re: Broken Rear Spring

« on: 06 September 2010, 14:42:52 »

Hi, having just failed my MOT due to both rear springs apparently being broken I am intrigued by the comment "Some non-VX springs are actually better as they do not taper the ends". When I felt the end of the spring it felt taped (& rusty!) could it be that the examiner was expecting a cut off end and in fact both are OK? One side was easier to access than the other, but both issues were at the bottom end - suspicious/unusual?
I guess my options are to (1) go somewhere else or (2) fit new springs (and claim the free re-test).
Having studied the How2, instead of dropping the rear diff etc is it possible to use spring compressors?
Would slightly shorter (20cm) compressors be easier to manage in the small space than, say, 30cm?
Thanks in advance,
Paul

3

Omega General Help / Re: V6 Multi-Ram Operation

« on: 11 January 2010, 18:58:37 »

Thanks Kevin. Possibly time to give up on this one. Once warmed up this morning I gave the throttle a serious yank (as per Jimbob's advice at the start of this thread) and the rear actuator twitched. I wasn't monitoring the front one but have trapped a small piece of paper in the end stop that will release when I really open it up which I have no intention of doing in the current conditions ... even with five sacks of ballast in the boot.
My conclusion is that the EM is pretty clever and it is only activating the valves when both the revs are as described in the documents and the engine is under load - detected from a intake manifild pressure sensor(??).
Thanks to all for the advice along the way.

4

Omega General Help / Re: V6 Multi-Ram Operation

« on: 10 January 2010, 14:19:42 »

Hi Kevin, I have completly bypassed the solenoid valve and connected directly to the actuator to check vacuum strength and all is well - it sucks and actuates - hence my suspicion of the solenoid valve.
Even 5 mins after stopping engine if I release the vacuum input feed to a solenoid there is a sustained hissing as the reservoir empties which seems to suggest that is working too as well as confirming there can't be any leaks in the pipework.
No fault codes either.

5

Omega General Help / Re: V6 Multi-Ram Operation

« on: 10 January 2010, 13:06:52 »

This is beginning to annoy me ..... !
Ok now changed rear solenoid valve since when it was bypassed the actuator moved. Still now movement when reved over 1,000rpm and solenoid taken off tests on 9V battery to be working OK.
Any chance the engine has to be hot before any of these actuators operate?
Further thoughts/suggestions welcome!

6

Omega General Help / Re: V6 Multi-Ram Operation

« on: 07 January 2010, 16:37:13 »

BM Many thanks.
No EML and no codes stored.
Aware that I could move the front solenoid but trying to diagnose first. I am expecting the rear to actuate at 1,000 though based on the docs posted above.
Bionic. Nice job. Guess I could equally tap onto the second T using some arrangement and seal up the broken one.
Andy B. Thanks for that but I fear the task of replacing the N-R valve is not that easy.
How easy does the servo pipe pull out of the servo body? Any special technique?

7

Omega General Help / Re: V6 Multi-Ram Operation

« on: 07 January 2010, 15:55:31 »

Hmmmn the wonders of hindsight! :-)
Continued trying to diagnose what I can before dismantling. Just saw the actuator blip briefly once today when reved but then never again. Seriously hoping it's not dodgy wiring to the solenoid, but discounting that is it more likely to be the solenoid at fault or the actuator itself?
Cheers.

8

Omega General Help / Re: V6 Multi-Ram Operation

« on: 06 January 2010, 15:11:55 »

Thanks for the quick comments.
Will wait till it's warmed up before giving it some on the throttle.
Seeing the front one move (~4,000rpm) would be great but for starters would like to see some response from the rear.
One the plus side when I released the output of the front reservoir it hissed quite noticeably so I'm confident the system is holding vacuum.
Fiddling about with the breathers did cost me a broken T-piece off the brake servo pipe though which is a drag and a reminder to all that they do become fragile with age.

9

Omega General Help / V6 Multi-Ram Operation

« on: 06 January 2010, 14:26:14 »

Very much appreciate the posts on here about the V6 multi-ram operation. I have confirmed that all vacuum pipes are correctly connected and no obvious leaks.
However, should I be able to see the Rear Actuator move when the engine is reved above idle, say >1000rpm, or does the ECU only trigger this when it detects the engine is under load i.e. driving?
At this stage obviously suspicious of the associated solenoid valve.
Thanks in advance.