Home > Maintenance & Mods (L322) > 4.4 tdV8 turbo oil drain mod. |
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Baltic Blue Member Since: 13 Aug 2015 Location: North Wales Posts: 3772 |
http://www.fullfatrr.com/gallery/albums/us...20Smke.pdf
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20th Jul 2018 10:12am |
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John w Member Since: 14 Jan 2018 Location: Cranleigh, Surrey Posts: 439 |
Hi Greg,
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20th Jul 2018 11:02am |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3544 |
Ok thx guys.
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20th Jul 2018 11:12am |
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stan Site Moderator Member Since: 13 Jul 2010 Location: a moderate moderated moderator moderating moderately in moderation Posts: 35326 |
the mod involves drilling a hole into the engine so it seems there will be two outlets.. ... - .- -.
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20th Jul 2018 11:28am |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3544 |
Yes sorry Stan I wasn't clear. The new pipe is a kind of Y with two outlets to the engine/sump. But the outlet from the turbo - or inlet of the Y pipe is what the turbo guy is questioning.
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20th Jul 2018 11:35am |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2485 |
The original pipe connects to a scavenger pump that doesn't do a proper job whereas the extra drain dumps directly into the sump above the oil level. |
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20th Jul 2018 11:55am |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3544 |
Gotcha, thanks Graeme
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20th Jul 2018 12:02pm |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2485 |
The 3.0 TDV6 had exactly the same problem but fortunately the original drain hole in the block from the 2.7 Jag's twin turbos was still there so the fix was to re-route the drain to the higher-up hole and block the old hole. When removing the TDV6's old drain one had to expect the drain to be full of oil, which mine was. I'd expect the same with the 4.4. |
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20th Jul 2018 12:02pm |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3544 |
Graeme, I've read through the PDF, I can see the two plugs that get removed and tapped for the new locations, I can't see the old hole being plugged up...?
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20th Jul 2018 12:17pm |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2485 |
The upgraded drain has 1 pipe going to the original spot and another going to the drilled and tapped top hole. The 2nd hole below the drilled one is used in the drilling and tapping as a drain though which the metal bits are flushed, then re-plugged. |
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20th Jul 2018 12:25pm |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3544 |
ok thx - so I guess the lower plug that gets removed is just for flushing? I can't see any other reason...
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20th Jul 2018 12:27pm |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2485 |
The computer generated pictures of the engine are of the 4.4 in the L405 which doesn't help and all the other nearby bits aren't shown. |
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20th Jul 2018 12:29pm |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3544 |
Graeme I showed Luka the turbo guy your response about the higher drain point:
and he then understood, said this drain fix started to make more sense. He still thinks regardless of drain issues, the turbo shaft seals are leaking, letting oil into the main chamber and in his opinion, the turbo would need refurbishing. What do you think? Greg Cheers, Greg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2011 Vogue SE 4.4 with lots of toys in Stornaway |
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20th Jul 2018 9:23pm |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2485 |
Of all the reported 3.0 TDV6 that smoked on hard acceleration after an extended run of light throttle before having the revised drain fitted, I don't recall any turbos having to be subsequently replaced. My old D4 now owned by a son has nearly 250K kms and without a hint of any turbo trouble. |
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20th Jul 2018 10:02pm |
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