Harsh ride.

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Mike E (uk)
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Harsh ride.

Post by Mike E (uk) » Mon Jun 08, 2015 9:25 am

Every little bump in the road makes the car shake.
Height is OK.
Just fitted new front spheres from AEP.

Rear pushes down OK,
but front still rather stiff.

I suspect the spheres are still the problem.

how easy should the front be to push down or could it be something else causing the problem?
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Re: Harsh ride.

Post by Kitch » Mon Jun 08, 2015 11:13 am

Unless the struts are shot, the spheres are really the only thing that can affect ride quality to that degree. AEP do normally do the proper 16v spheres - you didn't have regular ones fitted before by chance? The 16v ones are noticeably stiffer.

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Mike E (uk)
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Re: Harsh ride.

Post by Mike E (uk) » Mon Jun 08, 2015 1:30 pm

The struts are original 1992, and not as smooth as they used to be.
I have a known good recon pair here.

Before I replaced the spheres, the front was solid. It least it can be pushed down now, but it is not soft.
The previous spheres were the correct type.

Probably I will change the struts.
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Re: Harsh ride.

Post by Kitch » Mon Jun 08, 2015 1:52 pm

Thing is, if the struts were knackered enough to affect the ride to that extent, the car wouldn't rise and fall smoothly at all. It'd be noticeably stiff and jerky, so you'd have spotted that longer before the spheres went.

I wonder what the chances are that you've been sent a pair of spheres which are incorrectly boxed? So the number on the box is correct, but what's inside isn't. Happens a lot in the parts trade!

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Re: Harsh ride.

Post by rutter123 » Mon Jun 08, 2015 5:58 pm

Did u check the manufacturing date on the spheres? I recently got a pair from gsf one dated 04 /14 and the other 06/09 a pair in the same box with some 5 yrs between them, they got me another set both 04/14. They can loose pressure when sat on the shelf for years, they may be stamped with the pressure usually 55 or 65 bar or similar. Sit 4 people in the car then try again.
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Re: Harsh ride.

Post by MULLEY » Mon Jun 08, 2015 11:04 pm

Air in the system which needs purging? or did the old spheres shit out their nitrogen into the lhm?
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Mike E (uk)
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Re: Harsh ride.

Post by Mike E (uk) » Thu Jun 11, 2015 12:27 am

Doesn't the system self purge back to the reservoir? Except for the brakes which are a dead end.

Please someone correct me if I am wrong.
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Re: Harsh ride.

Post by themildbunch » Thu Jun 11, 2015 9:06 am

I'm not sure how much the spheres can loose over time if not fitted... I had a pair of cheap, unused Amtex recon rear spheres with an 03 / 04 stamp on in the shed and stuck them on the rear of my diesel recently and they seemed fine much smoother and softer than the old ones

If you have anyone local who can regas spheres that would confirm if yours are correct / leaky, etc..
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Re: Harsh ride.

Post by Kitch » Thu Jun 11, 2015 9:58 am

Mike E (uk) wrote:Doesn't the system self purge back to the reservoir? Except for the brakes which are a dead end.

Please someone correct me if I am wrong.
It does. I've always held the 'air in the system' thing to be a myth!

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Re: Harsh ride.

Post by Jaba » Thu Jun 11, 2015 11:25 am

Last time I went to Westroen for a recharge I took some new old stock spheres with me for testing. Although they were about 8 years old they were still up to normal pressure.
So I do not believe that they lose anything while on the shelf. The guy at Westroen confirmed this as he said they only lose pressure when they are being used on the car and his measurement of my spheres demonstrated this.

Mike, this can only be the struts. The thrust bearing at the top end dries out leaving it without lubrication. I store my struts upside down to keep the bearings immersed in LHM to maintain lubrication and keep the felt washers at the base of the bearings lubed up.
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Mike E (uk)
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Re: Harsh ride.

Post by Mike E (uk) » Thu Jun 11, 2015 6:33 pm

If I can still push the car down at the front by leaning on it, can it still be the struts though?

If they were stiff, wouldn't that be impossible?
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Re: Harsh ride.

Post by mds141 » Thu Jun 11, 2015 7:59 pm

A flush through with hydrauincage and fresh LHM returned the suppleness to the ride of the valver. I keep the struts lubed once a year as well.
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Re: Harsh ride.

Post by MULLEY » Sat Jun 13, 2015 6:42 pm

Clogged up lhm tank filters can cause suspension to feel hard, so worth cleaning & while you're at it, if the lhm is old, clean the tank & purge the lhm out of the brakes when you put nice new stuff in. If none of this does anything, then perhaps you have the wrong type of spheres on your car?
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Re: Harsh ride.

Post by maxgreenwood » Mon Jun 15, 2015 11:02 pm

might be worth checking the ball joints, they make a big difference in my experience, they can stick if they dry out and get partially seized, with the BX being pretty light it does tend to make the front end up lock up on slightly rough surfaces. Anyone else experienced this? I've had re-conned struts, new spheres, LHM and that has been the final link in the chain. Any creaking when steering or up and down can be a sign.
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Mike E (uk)
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Re: Harsh ride.

Post by Mike E (uk) » Tue Jun 30, 2015 9:47 pm

Thanks for the help chaps.

I took a front strut off, and that was fine.

On the 1st day of the challenge, we put new rear spheres on.

This improved things greatly...Until later that day...

when my rear height corrector started misbehaving by sticking either on high or low position.

It probably has muck in it.

I had to stop to reset the height often. When it was correct, the ride was very good.

So the conclusion was that I need to:
overhaul and clean the height correctors,
clean the tank filters and flush & replace the LHM.
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