Xantia TD Start Drop

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ecohouse1
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Xantia TD Start Drop

Post by ecohouse1 »

I presume this is normal. When I switch the engine off after a drive the Xantia rises up as we all get out the car and then stays at this height, say overnight, then when I get in the following morning it doesnt drop until I restart the engine, when it then drops right down - especially at the back. Occasionally if the car has been sat a few days these is a crunch at the back which I assume is the arm bearings getting a bit crunchy! I assume that this is the anti-sink working as it should?

Cheers

Alan
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CitroJim
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Re: Xantia TD Start Drop

Post by CitroJim »

No, that's not quite right Alan, when all the passengers alight and the rear rises, there should be enough stored pressure in the system after the engine is stopped for the rear to return to the correct level. In fact this is a classic test of the accumulator and the general health of the system. A good one will correct the height change a couple of times before exhaustion..

That the rear drops right down on start-up as well would suggest to me that the rear corners and the rear anti-sink sphere (which is actually an accumulator) may not be in the best of health and that also very much applies to the main accumulator. Check them all.. I'd suspect your main accumulator is completely flat. What's your tick rate like?

The fact the rear stays up does actually indicate the anti-sink vale itself is working!
ecohouse1
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Re: Xantia TD Start Drop

Post by ecohouse1 »

Thanks Jim. The tick rate is OK - I have done 55k miles in 4 years on those spheres. They were a full 6 set from Plaiedies. I have been toying with the idea of replacing. Do you think the time might have come? The car is often run well loaded and I pull a trailer and caravan which must put a bit of load on the rear.
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CitroJim
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Re: Xantia TD Start Drop

Post by CitroJim »

I'd certainly be inclined to check them Alan, are you near anyone who might perhaps have a sphere tester...

The rear corners particularly as they act as reserves of pressure for the rear suspension...

A further cause of the problem may be a bit of internal leakage and the usual prime suspect for that is the brake doseur valve.