SL500 96; what is this part? | Technical matters | Back Room Forum

Sat 11 Dec 2004 20:41

SL500 96; what is this part? - steve

I have a slight ticking noise coming from a small (about 2 inches across) unit mounted on a rubber mounting bracket in front of the ABS pump on the n/s inner wing; there is a 2 pin electrical lead running to it and two pipes; one running into the unit and the other out of it - there is a mark on the top with an arrow with the word MOT on it (motor?). I can feel the unit pulsing at the same rate as the ticking noise - any idea what it does?

Thanks

Steve

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Sat 11 Dec 2004 22:10

SL500 96; what is this part? - elekie&a/c doctor

This valve is part of the fuel evaporative emission system.Basically ,it allows excess fuel vapour to be returned into the air inlet system for combustion.

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Sat 11 Dec 2004 22:29

SL500 96; what is this part? - steve

Thanks for quick response. Can I disconnect the electrical connection to prove that this is causing the noise without damaging anything?
would it make sense that the valve could be making a ticking noise as it pulses?
Any idea what a new one costs?

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Sun 12 Dec 2004 10:25

SL500 96; what is this part? - elekie&a/c doctor

The noise & the operation of this valve sounds perfectly normal to me.Disconnecting this part while engine is running could cause problems with the engine management system & may bring on engine warning light .(if it has one)

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Sun 12 Dec 2004 16:41

SL500 96; what is this part? - steve

Thanks for the help; I wont try just pulling the lead off it then. It has just started making this noise; at first I panicked as it really sounded like a top end problem!
I need to fix it - you cant hear it in the car but you can hear it very clearly with the engine running and the bonnet up! It will annoy me if I dont sort it out and if i ever want to sell the car it could make it tricky.

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