 | Home > Technical > piston slap? |
 
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| Grouse Member Since: 16 Apr 2012 Location: on the hill Posts: 521  |
Sounds like big end bearings / crank shaft journals / bearings to me knocking under load 2017 Range Rover L405 Vogue SE V8 Diesel #16
Land Rover 110 300 TDI |
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1st Mar 2020 9:15pm |
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| Welshsurferdude Member Since: 23 Feb 2012 Location: Newport Posts: 2406 
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not a cheap sound to come from a engine alas specially if ran low on oil
 2008 Santorini Black 110 XS USW (Sold)
2015 Discovery 4.5 Black pack Firenze red XS 2008 Corris Grey 110 XS USW (sold) 2011 Santorini Black 110 XS USW (Sold) |
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1st Mar 2020 9:39pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5700 
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I understand that you were low on oil and there are other things top of your list, but just for your info, not long into Tdci ownership I was sure I had piston slap, or big ends gone. After a lot of worry and research I found out it was the VCV had failed, and required replacement.
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1st Mar 2020 10:58pm |
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| corgi1 Member Since: 26 Feb 2017 Location: bucks Posts: 440  
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Landy Andy whats a VCV ???
Pete |
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1st Mar 2020 11:08pm |
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| LR90XS2011 Member Since: 05 Apr 2011 Location: bickenhill Posts: 3641  
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When you say pulling back did the oil light come on? the oil light indicates oil pressure, the tdci takes about 7 litres and is designed for 45 degree angles, I expect the oil could be quite low before the pick up point is out of the oil. DEFENDER 90 TDCI XS,
I hope everyone is well and your land rovers make you happy |
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2nd Mar 2020 6:44am |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5700
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Variable Control Valve.
It’s a very small and delicate little valve that is easily changed on the front of the Tdci engine that controls the amount of fuel. |
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2nd Mar 2020 7:51am |
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| corgi1 Member Since: 26 Feb 2017 Location: bucks Posts: 440
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I didn't think of that NO the oil light didn't come on at any point so what does that mean
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2nd Mar 2020 8:14am |
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| corgi1 Member Since: 26 Feb 2017 Location: bucks Posts: 440
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a long shot but funnily rear demister stopped working at same time, this was all after garage fitted new front wiper stuff cos wipers wouldnt work properly, only saying this as odd things have things like fuses in common, although rear demister light still comes on on the dash - just a long shot but oil light deffo not come on at any time
pete |
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2nd Mar 2020 10:06am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17382 
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Strictly it is "volume control valve", it regulates the flow of fuel from the LP stage of the fuel pump to the HP stage and by doing so effectively determines the fuel pressure in the common rail. It is delicate, and a common cause of problems which usually do not produce DTCs due to a lack of monitoring. In fact a VCV fault is usually diagnosable by the absence of DTCs. |
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2nd Mar 2020 2:02pm |
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| dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586 
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mhmm due to oil consumption, check if the injectors are tight and/or Injectors copper seal are in good conditions (good diesel injection workshop) Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition
IID Pro MV License |
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3rd Mar 2020 11:32pm |
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