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Miguel
Member Since: 16 Sep 2008
Location: Viseu
Posts: 103
  
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| V8 strange sound on first crank |
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Has been happening for about a month now, when I first start my disco after beeing parked for at least an hour, it cranks just fine, it starts just fine, but I hear a grinding sound coming from what seems to be the top of the engine, for just about 1,2 seconds after cranking and then stops.
If I turn the engine off and crank it again, it is problem free, perfectly normal, as if it now was oiled and before it wasn't.
Had the car in the shop this week and changed the oil, my indie mechanic warned me that I had very little oil in the engine (bellow min and no warning lights). Had done only 20K kilometers.
Could it be some permanent damage? Could it be some kind of chain gone bad? or a tensioner? Hope I haven't ruined it, I was counting on giving it to my daughter when she gets her driving license (it will take about 18 years  )
The engine is now 120000 KM, is it time to change distribution pulleys and tensioners=
Should I keep it running 24/7 to avoid hearing the noise? 
Advice is very welcome, will repay in beer when in Portugal !
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 3rd Nov 2011 5:35 pm |
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Miguel
Member Since: 16 Sep 2008
Location: Viseu
Posts: 103
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Just made a small video, but it is not too clear except the increased noise the first time I started it:
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| 3rd Nov 2011 10:30 pm |
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Miguel
Member Since: 16 Sep 2008
Location: Viseu
Posts: 103
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After much reading and a few opinions later, I am now pointing towards the noise I hear beeing the starter motor. The scraping sound I hear seems to be the actuator not returning to it's casing in time, therefor grinding on something (flywheel?).
Would like to understand this better before going to the dealer and change a million things, when it could be of simple solution.
Cheers,
Miguel
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| 12th Nov 2011 12:14 am |
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caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
  
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Sounds a reasonable possibilitity. “There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
D3 2.7:Adaptive Headlights,Electronic Rear Diff,ARB Bar,Blaupunkt Speakers,JVC Powered Subwoofer,Removable Snorkel,Mitch Hitch,Pioneer After Market Head Unit,Steering Wheel Control Adaptor,Remote Adjustable Supension Rod System, Taxside Dual Battery System.
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| 12th Nov 2011 3:26 am |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26708
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It could also be the timing chains. If they are tensioned by a tensioner that uses oil pressure (like older Jag V8) then maybe the non return valve is letting oil out when its stood for a while. As soon as the engine starts, oil pressure tensions the chains.
I might be way off the mark, but......
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| 12th Nov 2011 12:58 pm |
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