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Thread: 1.4 TSI Crank Oil Seal

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  1. 1.4 TSI Crank Oil Seal 
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    I changed the crank front (timing case) oil seal at the weekend. It's not a difficult job but a couple of observations:

    1) That is the strangest seal I've ever seen. The inner lip is like thin card and folds rather than bending like rubber. Be careful fitting this. Anyone know what it's made of and why it's like that?
    2) The centre bolt torque was 150nm + 180degrees. I replaced the bolt and couldn't get much past 90 on a long breaker bar. The bolt that came off was not done up to anywhere near this torque so I'm not that worried but wondering what other folks experience is?
    3) The manual says there should be a diamond washer behind the crank nose bush and an O ring. None were present on mine and I fail to see what the purpose is so it went back the way it came out but should these bits be there or deleted in later years?

    Ta,
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  2. Re: 1.4 TSI Crank Oil Seal 
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    I am taking a guess here that it is a 2008 ish CAXC engine? These do not use the diamond washer but the O ring N 909 032 01 is definitely there, or should be! The seal is made from Polytetrafluoroethylene or PTFE commonly known as Teflon. The key point with a PTFE seal is that the surface it runs on MUST be absolutely clean and dry and with no trace of oil or grease on the surface or indeed added to the face of the seal, basically as dry and clean as humanly possible. You are taking a huge risk removing the crank pulley on this engine if the crank is not locked with the T10340 pin and you do not use a dial gauge through number 1 plug hole to ensure you are at TDC. The original bolts were often 19mm 12 sided and the new ones 21mm and these must be torqued up to spec or it can come undone, this is so difficult to do that you need the proper 3415 crank pulley locking tool which engages in the pulley slots and bears against the chassis and then a very long and strong bar with a 3/4" drive and it takes so much force that there is a very real danger of dragging the car off of a two post lift. The specified torque is 150Nm+ 180. Ohh yes, the point of these seals... low drag, reduced Co2, another example of the blinkered obsessed insane race to reduce Co2 at the expense of all else...
    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:


    www.helpforheroes.org.uk

    Keep XH558 in the air
    www.vulcantothesky.org

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