Fast tick time (was Changing hydraulic pump)

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Kitch
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Post by Kitch »

Last time I put hydraflush in my car it caused all manner of headaches, as it picked up all the shit and blocked various filters and ports with it. Never again - regular(ish) LHM changes with filters cleaned each time is all I'll do now!
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Post by MULLEY »

Dollywobler, erm, how can you tell it's green in the system? Topping the lhm tank up with new lhm is all very well, however what about the old lhm in the system that might be ancient? The only way to tell is to drain it all out to check the colour & if its like new, then its probably ok.

Kevan, good point, if the spheres were leaking nitrogen, wouldnt the ride just be rubbish anyway, so nothing would change the ride. What i meant was that if the ride was ok, it just seems to make it that little bit softer/nicer, if that makes sense?

Kitch - Never had any problems myself, how long did you keep the hydraflush in for? If you didn't keep it in for very long, perhaps that might have been the issue & it wasn't given a chance to clean properly? You might have just unlucky, but if hydraflush caused the problem, then it must have been really gunged up badly, so i wouldn't have thought changing back to lhm would have resolved the issue as lhm doesn't clean anything, so the gunk would just stay where it was. I'd be interested to know a bit more about your experiences pre hydraflush & then what changed.

Anyone else had a bad experience with hydraflush?
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Post by Dollywobbler »

Mulley - I've got enough small leaks, and when swapping the pump over it was very apparent that the fluid looks fresh. I'm not ruling out a flush - I had one done on my last BX and it cured the intermitttent PAS and made it ride better. On that occasion, we filled it with hydraflush, then took it on a 1000 mile drive around Scotland. As far as I know, it's still fine now almost two years later. Barry Annels did that one and there was a lot of work removing the reservoir and clearing out all of the filters. After all, the flush is designed to chuck all the gunk out and it has to go somewhere!
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Post by MULLEY »

Took me approx 6hrs to do a proper lhm change when i did paul296's car a few weeks ago. When i come to remove the hydraflush in a month or so, i should be able to do it a fair bit quicker than my last effort, hadn't done it in ages, so took it slow to avoid problems. We also changed the fuel filter as well, so being new to that, it slowed me up overall. I also had to remove the fuel filter out of the way of the lhm tank as there wasn't enough room to maneouvre the lhm tank out, damn annoying that. Now that i've slackened off the rear caliper bleed nipples, they'll shift much quicker this time around :D

What i did when i hydraflushed my own car was to drain the hydraflush out of the tank with the car on low (approx 1k miles) & i filtered the filthy hydraflush, once cleaned i put it back into the tank to continue its good work. I did approx 2000+ miles with it in, & then replaced it all with new lhm.

If you believe the lhm is ok, then no need to go to the trouble, but if in any doubts its worth doing anyway, its cheap to do, just a little labour intensive. I'm no mechanic & i've managed to do this a few times now whilst referring to the DIY section instructions which are nice & clear :D

Lets hope you get your issue sorted.
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Post by Aerodynamica »

If the reseating of the ball valve doesn't sort it then I bet it's the FDV :evil:
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Post by Dollywobbler »

Bumping this one. The ball bearing has been reseated. Still got juddery steering (as you'd expect as the steering pressure doesn't go through the regulator) and quick tick time with constant pump running on tickover.

So, it's looking like either a weak pump or FDV. Any ideas on how to diagnose?
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Post by MULLEY »

If you can fit a known good pump, & then everything is fine, then you have your problem :cry:
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1990 Gti 8Valve SOLD - looks like it's been scrapped
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1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN

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Post by Dollywobbler »

Hmm. Not sure I do have a known good pump, that's the problem. We have (well, Mat did) changed the pump, but that made no difference at all. The PAS issues only started after the car was welded up. It was left for some days at a rather jaunty angle (the back end was jacked up to a more manageable height for working on) but I can't really see how that could have affected it.
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Post by Dollywobbler »

Interestingly, the PAS issue seems to have gone away today, presumably because it's a bit milder and the LHM is flowing more freely. Tick time still 6 seconds max with revs raised, continuous pump running on tickover.
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MULLEY
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1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
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Post by MULLEY »

Did you change the accy sphere on your car? If you did, was it a brand new one? You might have been unlucky & got an old new one which was flat? If you could borrow one from one of Mat's cars? If that solves the tick time then jobbed 8)
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1990 Gti 8Valve SOLD - looks like it's been scrapped
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1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN

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Post by mat_fenwick »

Hey, steady on! :lol: He'll be pinching all the best parts before I know it!
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MULLEY
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1992 TZD Turbo - Bluebell - SORN
1992 TZD Turbo Estate - SORN
1991 Gti 16V - Blaze - crash damaged, will get repaired - SORN
1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN
x 8

Post by MULLEY »

Sometimes the only way of finding the problem is by doing some of the obvious things 1st, even if the car in question has had replacement parts fitted :wink:

I'd presumed that he would have given your parts back to you :lol: But if they work, heyho, off to work i go :lol: You've got 2 working cars, thats just greedy :wink: :lol:

Seriously though, it migh save a shed load of time in the long run :?:
2002 C5 2.0 HDI Estate - Jasmine - Now SORN
2011 Mini Cooper D Clubman - SOLD
2016 Mercedes A180D Sport - Auto refinement
1992 TZD Turbo - Bluebell - My daily
1991 Gti 16V - Blaze - crash damaged, will get repaired.
1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN

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Post by Dollywobbler »

Actually Mat, perhaps you should just give me the red BX? Thanks. Tomorrow ok? :P

Another accumulator is probably a good idea, more seriously. As it's not affecting the steering though, I think pump is the priority.
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