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S80 '06-'16 / V70 & XC70 '07-'16 General Forum for the P3-platform S80 and 70-series models |
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D4204T5 excessive oil burnViews : 17050 Replies : 50Users Viewing This Thread : |
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Nov 11th, 2020, 07:53 | #21 | |
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Are you saying that the very small holes are new and that these small holes were letting oil through? |
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Nov 11th, 2020, 17:09 | #22 |
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That holes stoped flow oil in to pistons. The oil is returned to the engine via the pistons. after the oil has not passed through the pistons rings, it remains in the cylinders and as a result it is burned oil.
piston rings are most often damaged by egr valves because during combustion, everything is returned to the engine via the egr valve and etc.. |
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Nov 14th, 2020, 14:27 | #23 | |
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Nov 14th, 2020, 15:30 | #24 | |
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If I understand things correctly then the oil control ring is the bottom ring on a piston, and it ensures that the amount of lubricating oil that is allowed to pass by the piston rings is just enough to enable lubrication and no more than this. Is this right? Are you saying that your oil control rings failed in their job and allowed additional oil to get past the piston rings and into the combustion chambers? Are you saying that this oil was getting burned during combustion? Are you saying that some of this burned oil was then passed through the EGR valve and back into the combustion chamber again? Are you saying that this burned oil then contaminated the combustion chamber and caused damage to the piston rings (and possibly also to the cylinder liners)? |
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Nov 14th, 2020, 16:31 | #25 |
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Nov 14th, 2020, 17:24 | #26 | |
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I now understand. Many thanks. |
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Dec 13th, 2020, 11:47 | #27 |
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@Dante86 and @Valdas1988
How did your stories end? @Valdas1988. How is the oil consumption? @Dante86 Did you keep the car? |
Dec 15th, 2020, 12:36 | #28 |
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Hi, Yes, I kept the car. The seller undertook the reparation in warranty. A smaller car service (not official Volvo) replaced the Piston rings (the oil rings were visibly clocked). The total repair cost £1000 for the seller (it was very cheap). Since they were disassembling the engine, valve steam seals and crankshaft seal have also been replaced. Now, after 1000 miles it seems the oil burn issue has no longer exist.
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Dec 15th, 2020, 14:44 | #29 | |
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Many thanks for sharing this. |
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Dec 27th, 2020, 14:37 | #30 | |
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V60 D4 SE Lux MY15 Savile Grey. Gone but not forgotten. |
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