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MG MGF Technical - Ride Height & Hydragas Pressure

My F has recently had its Hydragas re pressured to "the correct pressure" the ride height has gone to 368mm, only problem is the car is fitted with lowering knuckles. My local garage tellls me that the pressure should be the same with/without lowering knuckles fitted. Is this correct?
Terry

Hi Terry,

Same pressure with or without lowering knuckles - that's my understanding too - 400psi I think.
Dave Livingstone

I wouldn't worry too much about the pressure. MG-Rover simply say to pump it up to the required height and don't specify the pressure. Terry's car sounds too high if it's got lowering knuckles. 368 mm is the height for the standard car.

Mike
Mike Howlett

>> My local garage tellls me that the pressure should be the same with/without lowering knuckles fitted. Is this correct? <<

This is obviously not true. With lowering knuckles, the ride height of the car should be at least 20mm lower at the same pressure (circa 400psi as Dave says).

However, the garage should never set ride height on pressure - the pressure at the time of fluid filling is extremely unreliable. Ride height should always be done on measured ride height - as Mike rightly says.

Time to return to your garage me thinks.
Rob Bell

I would take it back,

My 'F' has lowering knuckles, which dropped it by 35mm ride height done at garage always set by the height,, never by pressure.

Now 335mm at front and 320mm at rear
Jay Smith

Thanks for the advice, seems I may not actually have the knuckles fitted if the pressure is the samewith them fitted as Dave and Rob advise.
Is there an easy way to check if the pins are shorter than standard?
Terry

This thread was discussed between 06/03/2006 and 08/03/2006

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