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#1
9th October 2014, 10:56 AM
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Cambelt Water Pump Woes
The S8 was back in the garage today having the cam belt changed as well as the recently whining ATF pump/filter looked at.
Seeing as the front of the car was in pieces it made sense to check the water pump as well, which it turns out had been weeping. All of the nuts holding it in were close to sheering as they were being undone, and 1 in fact did sheer off. The garage are now scratching their heads about how to proceed. They are 6mm at the thread so drilling it out would be very risky. The only way they can proceed (short of taking the engine apart) is to fit a new OEM pump and hope that 1 missing bolt won't affect the seal too much. Any thoughts/ideas/suggestions/prayers welcome. 
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#2
9th October 2014, 11:06 AM
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I think you need all the bolts out. When I had the cambelt done on my D3 I was in the same predicament, except my existing pump was fine. The garage said they would need to get a 3rd party in to drill out the bolt if it sheered, so drill out should be ok. The result is that I still have the same water pump fitted.
The garage may not be able to do it, best bet is for them to get an engineering company in to do this who have done this sort of thing before.
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Manny 2004 A4 1.8T Sport Cabriolet, 89K Miles Past 2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly with retrofit AMI and DVB-T in place of Analogue 2003 Volvo S60 D5 SE Manual, 197K miles. 2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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#3
9th October 2014, 11:48 AM
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Happened in my PF too. I think the garage used an additional gasket and the rest of the bolts... it didn't lose any water for the rest of the time I had it.
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2010 Jag XF 3.0D Portfolio S I know.. I know.. 
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#4
9th October 2014, 12:34 PM
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I don't see what are they making the fuss about, just drill a hole and use bolt extractor. I had 2 of cambelt cover bolts shear off on mine, drilled out myself, even the front of car was not off, just used dremel with right angle adaptor and and then bolt extractor. They were M8 bolts but should be doable on M6 as well, just use smaller drill and extractor.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure
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