L322 4.4 TDV8: Why does the oil cooler leak?

[@conperry1732]

I did mine a couple of years ago. Another time, I replaced every coolant hose on the entire engine, the oil feed seals to the turbo ( you mamaged to get viton, which is superior), and all the plastic coolant pipes and thermostat housing complete. This is because I don't want to be going in there again anytime soon. A big call calling that job suitable for competent DIYers I think.

[@conperry1732]

At that time, not another time!

[@robholland1937]

Nissens are available from Advanced Factors at reasonable price 😊

[@neilwhite8131]

Have just changed mine, wish I had also got the pipe that runs from the above the radiator to the front of donut as that snapped at the t junction, that stopped me in my tracks, but have fitted a new one. Luckily only a 5 day delivery. Did not realise you were so local to me.

[@ky.g1441]

Question: if the root cause of an oil leak is due to gasket, would it be possible to just replace the seals? I mean other than bad seals are there known problems of internal strutural integrity failing on these oil coolers?

[@hnzpht1449]

Hi i have same problem thank you for perfect info

[@wezzla]

Great content! Keep it up! One question, why does the whole oil cooler needs to be replaced? Isn't sufficient just replacing the two gaskets?

[@jamesg25]

Thanks for the feedback, appreciate it. It’s a good question. The oil cooler unit can either suffer gasket failure or the aluminium heat exchanger/mount can warp/crack. It can be a bit tricky to diagnose the exact failure mode and it takes time - I usually have a fairly long list of car jobs each week so I’m always trying to spend my time effectively. If it was your own car and you aren’t reliant on it as a daily and you are happy to tinker it’s worth having a go at replacing both gaskets along with the oil feed o-rings and water feed o ring.

[@573885]

I got oil pressure light flashing with cold engine after changing the cooler. Did not have it before. Is it a coincidence or a bad part i dont know

[@daddyj-w7038]

Hi. Great content. Do you need to drop the oil and coolant levels to do this job? Thanks :)

[@jamesg25]

Oil - no, but you do need to loosen off the oil filter and let it drain. Be prepared to catch oil. Coolant - the coolant channels are fairly complex and draining the whole system is a bit of a faf I’ve found it best to have a couple of large drip trays underneath to catch the coolant. You are pretty much disturbing the top of the system so you don’t loose that much.

[@daddyj-w7038]

Thanks for the reply - appreciated.

[@darrenmeddings7484]

@jamesg25 I have oil in my coolant and the local garage conducted a sniff test and concluded the head gasket had gone, they are not a Land Rover specialist and I’m wondering if the cooler had gone or egr problems would show similar symptoms to head gasket failure to an untrained eye?

[@podgehealy]

Might have this problem on tdv8 4.4.. Ive grey slight blue heavy smoke but only when cold start