![]() | Home > Technical (L405) > L405 SDV8 Oil in the plenum etc. Help! |
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kevinp Member Since: 28 Sep 2019 Location: Telford Posts: 1257 ![]() ![]() ![]() |
Have you just changed the oil filter by any chance? |
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Neil183 Member Since: 21 Dec 2016 Location: Rickmansworth Posts: 42 ![]() ![]() ![]() |
No, but it had a service not that long ago, probably done 1000 miles since.
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kevinp Member Since: 28 Sep 2019 Location: Telford Posts: 1257 ![]() ![]() ![]() |
There is a chance that the oil filter drain valve may have come off it's post underneath the filter. Worth taking the filter out and having a look. |
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Cam-Tech-Craig Member Since: 03 Aug 2011 Location: Gloucestershire Posts: 16306 ![]() ![]() ![]() |
Good shout Kevin... was just about to chirp in the same advice... |
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D3Jon Member Since: 15 Aug 2020 Location: Lincolnshire Posts: 467 ![]() ![]() |
Interesting... How does this lead to excessive oil getting into the throttle body / intake pipework, etc? New one on me? <<--- BTW, this is a genuine question! ![]() Jon 1992 RR Classic 3.9 efi Vogue 2014 Disco 4 HSE =================== Both my fatties now gone... Previous: 2011 L322 4.4 TDV8 Vogue SE /// 2002 L322 4.4 V8 HSE /// 2009 Discovery 3 2.7 TDV6 XS /// 2004 Defender 90 TD5 /// 1993 110 V8 Snatch Landrover /// 2005 Discovery 3 2.7 TDV6 SE (Aus) /// 1990 110 Isuzu 3.9 County (Aus) /// 1976 Series III Trayback (Aus) |
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kevinp Member Since: 28 Sep 2019 Location: Telford Posts: 1257 ![]() ![]() ![]() |
I don't realy know to be honest. Someone on here did explain what happens if it's misplaced.
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D3Jon Member Since: 15 Aug 2020 Location: Lincolnshire Posts: 467 ![]() ![]() |
Thanks Kevin, |
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caymanblack Member Since: 08 Dec 2015 Location: DEVON Posts: 1151 ![]() ![]() ![]() |
Bloody hell who diagnosed that Kevin? |
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kevinp Member Since: 28 Sep 2019 Location: Telford Posts: 1257 ![]() ![]() ![]() |
It's not that the oil filter is not correctly installed, it's the drain back valve that comes off it's locating post.
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kevinp Member Since: 28 Sep 2019 Location: Telford Posts: 1257 ![]() ![]() ![]() |
To be fair the car gave all the symptoms of blown turbo's. I discovered the problem of the valve becoming detatched and nobody seems to have mentioned before that this can happen. That's why I say to always check it is firmly in place before installing a new filter. ![]() |
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D3Jon Member Since: 15 Aug 2020 Location: Lincolnshire Posts: 467 ![]() ![]() |
Gotcha! So that being dislodged, would lead to the oil filter housing draining down when the engine stopped, leading to a slightly longer time to get oil pressure when starting the engine. Not bunging up the housing drain hole must cause an excess of oil somewhere else (when the engine is running), where it must then find its way into the intake system; via possibly a crankcase vent? Rover V8's used to have this problem (especially on track with lateral G's), where the oil couldn't get back from the heads to the sump quickly enough, leading to it going out through the breather system and being ingested into the intake system. I got black flagged at Mallory Park for this very reason, with a smoke screen behind me, James Bond style! Made a temporary oil catch tank out of a thermos flask and back out for the next session! Jon 1992 RR Classic 3.9 efi Vogue 2014 Disco 4 HSE =================== Both my fatties now gone... Previous: 2011 L322 4.4 TDV8 Vogue SE /// 2002 L322 4.4 V8 HSE /// 2009 Discovery 3 2.7 TDV6 XS /// 2004 Defender 90 TD5 /// 1993 110 V8 Snatch Landrover /// 2005 Discovery 3 2.7 TDV6 SE (Aus) /// 1990 110 Isuzu 3.9 County (Aus) /// 1976 Series III Trayback (Aus) |
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Neil183 Member Since: 21 Dec 2016 Location: Rickmansworth Posts: 42 ![]() ![]() ![]() |
Turns out that the plenum had split along the seam slightly causing an air leak. Not sure if this was there before or if I damaged it cleaning to be honest...
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JayGee Member Since: 27 Jul 2021 Location: London Posts: 3283 ![]() ![]() ![]() |
Chain rivet the seam with pop rivets or self tapping screws. The turbo hits just under 1.5bar above atmospheric so quite a lot of pressure.
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Neil183 Member Since: 21 Dec 2016 Location: Rickmansworth Posts: 42 ![]() ![]() ![]() |
Blimey, thats very inventive!!
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