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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
How to diagnose injector seals leaking on 2.2 tdci?
I’ve been chasing an oil leak on the 90 for a while. It looks like it’s coming from the rocker cover gasket and I’ve read that this can be caused by injectors passing and pressurising the case. The leak only happens when running/hot. The injector seals are easy enough to replace but I wanted to know how to prove I have a problem?

Also, assuming they need doing, aside from the washers themselves, what else do I need to replace?

Thanks
Col
Post #891171 13th Mar 2021 7:23pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
I'd expect you to be able to smell diesel in the oil. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #891277 14th Mar 2021 8:37am
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hank



Member Since: 12 Sep 2016
Location: South Wales
Posts: 2217

Wales 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Post #891299 14th Mar 2021 10:21am
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Thanks gents. Thumbs Up
Post #891307 14th Mar 2021 10:39am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16807

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
LandRoverAnorak wrote:
I'd expect you to be able to smell diesel in the oil.


I'm not sure that you would with a TDCi, this tends to be a TD5 symptom.

The TD5 has the fuel rail incorporated into the head as a gallery within the casting, and the injectors therefore have two seals, the copper washer to seal the cylinder/injector interface and an "O"-ring to seal the gallery and prevent leakage from the gallery past the injector into the rocker space. Lubricant dilution with fuel on a TD5 is most commonly caused by the "O"-ring leaking.

The TDCi has an external fuel rail and hence should be more or less immune from the lubricant dilution mechanism above. Leaking seals on the TDCi will cause cylinder gasses to blow past the injectors and will generally result in smoky vapours from the breather system, oil being blown into the induction passages, and oil leaks from the top cover. It won't result in fule in the lubricant however.

Lubricant dilution with fuel on the TDCi is generally the result of a dribbling injector overfuelling a cylinder (or more than one injector overfuelling more than one cylinder) so that incomplete combustion takes place, a damaged piston or bore resulting in no combustion taking place, leaving fuel in the cylinder, or, for the 2.2 version only, a problem wit the DPF regeneration cycle. The first two of these (but not the DPF issue, of course) can also happen to a TD5.
Post #891327 14th Mar 2021 12:29pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
I couldn’t smell diesel, but as Blackwood explained this may not be a symptom. What I found was that the area around the 4th injector looked “wetter” than the rest. I also took the oil filler cap off and it was definitely puffing a bit. I held my hand over the hole for a second and got a fair bit on the glove. Is this the norm though?



Click image to enlarge



Click image to enlarge
Post #891333 14th Mar 2021 12:53pm
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spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4425

Ireland 

I had an oil leak and it turned out to be these LR018370.
The main dealer automatically assumed it was the injector seals and changed them but that was not the case. Same number for the 2.2 and the 2.4.


Click image to enlarge

https://www.lrdirect.com/LR018370-Seal/?keep_https=yes
Here is a choice of makes.


Click image to enlarge

£3.53 from Advanced Factors 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai
Post #891450 14th Mar 2021 10:52pm
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Julie



Member Since: 07 Oct 2017
Location: Nantes
Posts: 421

France 2012 Defender 110 Puma 2.2 SW Keswick Green
blackwolf wrote:
The TDCi has an external fuel rail and hence should be more or less immune from the lubricant dilution mechanism above. Leaking seals on the TDCi will cause cylinder gasses to blow past the injectors and will generally result in smoky vapours from the breather system, oil being blown into the induction passages, and oil leaks from the top cover. It won't result in fule in the lubricant however.


In this case, a compression test may help

Post #891935 16th Mar 2021 7:23pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Thanks Julie. Off to a specialist on Friday for a second opinion. My soon to be ex-garage just uttered the fateful words; it’s a defender, they all leak!
Post #891936 16th Mar 2021 7:28pm
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BIMbound



Member Since: 09 Jan 2021
Location: UK
Posts: 44

2.4 TDCi. I didn't know my injector seals were leaking but there was an unpleasant oily/fume smell coming through the vents, now replaced this has been cured.
Post #893279 22nd Mar 2021 8:32pm
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