Thread: 2016 L494 SDV8 HSE Oil Leak

Originally Posted by Graeme

I've only heard of an occasional MY11 L322 with the TDV8 with a leaking rear main seal. I also note that the original seal part number was changed some time before 2012 engines.
A replacement rear seal requires a new crankshaft position ring fitted with a special alignment tool.

Presumably your indy is aware of the oil cooler gasket leaks and the leaking o-rings on the turbo oil feed pipe that mounts to the rear of the oil cooler.

Thanks Graeme great info as usual, I would not use this INDY for the job he was just doing my auto oil change as one needs a hoist. I called TR spares to get a parts quote and the man said almost the same as you, he thinks oil cooler, the O rings are fairly new , said with my mileage he would change the Oil cooler as preventive maintenance . So I have ordered the cooler, none in stock ATM, and will organise a Land Rover specialist to do replacement. If it does turn out to be rear main oil seal then I will do later.

Once again thankyou for the info.

FWIW,, mine just had a gearbox service (not at "first available slot is 2 months away" Pacific Landrover), and the very reputable gearbox specialist noted a "very slight weep" from the rear main...
oh and 800bucks for the service...
and it drives like new again...

I am off to W.A with the van, so need to get the oil cooler sorted am not concerned if the leak turns out to be rear main oil as this can be put off, but gaskets and seals failing in the oil cooler can cause some real problems.

My car has lots of K's all long distance, car runs like new and I have changed Oil no more than 15,000 K's mostly 10,000. Have also replaced all the plastic cooling system components, not a cheap exercise but less expensive than a rebuild.

As a tow vehicle I think there is none better, had to reduce rear axle weight , but putting in LIPO4 batteries and taking out rear Mufflers helped in this regard, plus with rears gone I have a slightly louder exhaust note which is neat.

Yesterday fitted a 400 watt iTech inverter, aim to run Starlink in the car plus can now charge e bike batteries on the fly. Put the inverter where the Jack used to be, made up outlet and switch in a Jaycar Jiffy box so no holes in car. I use a hydraulic jack which sits in tyre well. All looks original and neat.

Let's hope I can get the little things sorted before leaving. First stop on the trip will be the Mundi Mundi music festival at Silverton.

The plan here is somewhere at the south of WA for Chrissy.... probably use the Barrier Highway this time...

Originally Posted by Graeme

Replace the o-rings with Viton BS611 - 2 of.

I understand that access to the pipe fitting is reasonable once the panel under the wipers is removed, but I only have experience with the L322 where removal of the cabin air intake (remove 2 nuts) is all that is necessary.

The oil cooler gaskets may not be far behind the o-rings in leaking but that's a bigger task.

Quite true, did mine today and removed far too much as I thought the intake platinum had to be removed. Made extra work.

Remove both strut braces, remove windscreen wipers, remove plastic cover , and then remove metal cowling .

If you have rose jointed hands, you can now get to the turbo oil feed line.

Would say 60 minute job at the most.

Well I am still chasing a slight oil leak. Oil is in the valley and isn't coming from the turbo oil feed, I did fit new O rings whilst in there. My son in Law was swinging the spanners and said it looked like drivers side rear, possibly rocker cover gasket. I would like some ideas from the brains trust folk here, Been told put new rocker covers on tif doing a gasket, But I am still unsure if the leak is Rocker cover.

Of course the big question is how big a job is the rocker cover gasket replacement?

Thanks.

That is the inlet manifold. The injectors bolt through it and their pipes should be replaced when the injectors are disturbed to ensure no high pressure leakage.

Have the oil cooler gaskets or the oil cooler assembly been replaced? When leaking, oil will leak down the right rear of the engine.

Originally Posted by Graeme

That is the inlet manifold. The injectors bolt through it and their pipes should be replaced when the injectors are disturbed to ensure no high pressure leakage.

Have the oil cooler gaskets or the oil cooler assembly been replaced? When leaking, oil will leak down the right rear of the engine.

Yes new Oil cooler assembly as preventative maintenance 12,000 k's ago. On inspection no oil leaks around there. So I take it that the inlet manifold is combined rocker cover . Would it be worth replacing the inlet manifold/s if this is where the leak is as it seems that only extra cost would be the manifold? I have most likely been googling the wrong stuff , rocker covers, so hopefully I can get to understand the issues a little better. Is there any other area I should check for top end RHS rear oil leak? The leak doesn't amount to any sign of loss using on board oil gauge , but get a very light smear on my drive now and again. For me it is about knowing what to deal with and then making a commercial decision.

I appreciate your help Graeme.