help with my e34 again!

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Hi Guys,
enjoying my 525tds but recently i have been suffering with a strange fault!on start up occasionally my fan belt is slack and the tensioner (which is a funny piston type thing) has moved. A quick poke with a screwdriver and it pings back into place!! and then all is well for a while
does anyone have any ideas what this fault is?
also, previously i posted a fault about a humming noise from the rear drivers wheel and my abs light came on. strangely the hum has stopped, the abs light is off untill i pull away then a few seconds and its on? again any ideas guys
many thanks for any feedback!

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dumphus65 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03-November-2011 Location: Anglesey, North Status: Offline Points: 14	Post Options Post Reply Quote dumphus65 Report Post Thanks(0) Quote Reply Topic: help with my e34 again! Posted: 05-January-2012 at 09:15
	Hi Guys, enjoying my 525tds but recently i have been suffering with a strange fault! on start up occasionally my fan belt is slack and the tensioner (which is a funny piston type thing) has moved. A quick poke with a screwdriver and it pings back into place!! and then all is well for a while does anyone have any ideas what this fault is? also, previously i posted a fault about a humming noise from the rear drivers wheel and my abs light came on. strangely the hum has stopped, the abs light is off untill i pull away then a few seconds and its on? again any ideas guys many thanks for any feedback!

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Andrew Rolland Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Go away rain Joined: 19-August-2004 Location: Scotland Status: Offline Points: 6579	Post Options Post Reply Quote Andrew Rolland Report Post Thanks(0) Quote Reply Posted: 05-January-2012 at 12:54
	Sounds like you need a new fan belt tensioner. It appears to be seizing up when stationary, if it's an original part then it may just be life expired and doens't sound like it is a serviceable part. ABS could be a fault with the ABS ring or a fault in the bearing assembly causing a hum and vibration which is upsetting the ABS sensor.
	Be exclusive and drive a Petrol 5 Series! Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto

dumphus65 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03-November-2011 Location: Anglesey, North Status: Offline Points: 14	Post Options Post Reply Quote dumphus65 Report Post Thanks(0) Quote Reply Posted: 09-January-2012 at 21:51
	Hi Andrew, sorry for the delay, v crap internet at the mo ! many thanks for your post ..............most helpful yet again