300 Tdi oil cooler - necessity of?





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  1. #1
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    Default 300 Tdi oil cooler - necessity of?

    I'd like you guys' opinions on the necessity of an oil cooler on the 300 Tdi. As you know, on a Disco it takes up valuable space that could be used to extend the radiator.

    Behind my question is that I recently found out that Hot4Cold can build a very nice all-aluminum radiator, which I'm thinking of doing as an alternative to a recore. This would make even more sense if I could increase the front area instead of the space taken by the oil cooler.

    Surely the oil can only get as hot as the engine, anyway?



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    Default Re: 300 Tdi oil cooler - necessity of?

    Can of worms. But here is my opinion:

    - it is another point of failure which cost me a Nissan TD27 engine once
    - lots of TDi engines never had one
    - a good cooling system and intercooler and regular oil changes with a proper multigrade oil at shorter intervals should be adequate
    - cold oil is actually bad for an engine and actually causes lower performance due to high viscosity

    That being said: fit a Madman EMS with an oil temp sensor and monitor anyway.
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    Default Re: 300 Tdi oil cooler - necessity of?

    Antz

    My 2 c worth

    Having towed every now and again with my D1 the oil pressure at hot can vary from 2.2 ish to 1.8 ish when towing hot and in a hurry - at 2000 rpm plus

    Oil pressure and temp are related to me so I would be scared of removing the oil cooler

    I put in the alu radiator 10 years ago - as cost to repair old copper one was same as a new alu from lp4a - and I think it cools better than the original copper one - no data to prove it though

    As you know I was chasing down an overheating problem 3 years ago and turned out to be those missing radiator shroud rubbers that we found after a couple of beers together

    While chasing down my overheating I re-wired the aircon so I could get the aircon fans to switch on independently - that helped a bit

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    Default Re: 300 Tdi oil cooler - necessity of?

    The way I see it you shouldn't delete something that the manufacturer though was important. Cooling the oil is a very effective way of controlling the temperature of the motor. On my Lotus 7 replica I got a reduct of 12°c on the water temp by adding a oil cooler.
    If you are thinking of having an aluminium radiator made there are a few ways of getting better heat transfer than adding to the frontal area. An aluminium core will give better heat transfer than an old style copper core. If the core is made slightly thicker you add a lot of extra area for cooling. The one mod we have done on racecar radiators was to make them a dual pass system. To do this you block the flow of water half way up the inlet side tank forcing the flow to pass through the core twice. If the inlet and outlet are on opposite sides you get the flow to go across a third of the the core in a S pattern. This allows the water to spend more time in the core of the the radiator and fully utilise the size of it.
    A good radiator builder will know how to do these mods to get better cooling.
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    Default Re: 300 Tdi oil cooler - necessity of?

    Have had a external oil cooler in my 300TDi for last 15yrs never had a problem temps on long trips sit around 80 -90, never one leak, but then again I use good quality hose fitting FTF and oil cooler Setrab make, I also have a small power stearing cooler as well
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    Default Re: 300 Tdi oil cooler - necessity of?

    Thanks for all responses so far.

    I wonder whether they can build me an aluminum radiator with an oil cooler like the original...

    RossJ, is your aluminium radiator the aftermarket one with plastic tanks? I was scared of just buying that one, I would rather recore the original with its brass tanks. But if it served you for 10 years (and I know your mileage isn't exactly low) then maybe I should consider.



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    Default Re: 300 Tdi oil cooler - necessity of?

    Hot4Cold know their stuff.
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    Default Re: 300 Tdi oil cooler - necessity of?

    Try to keep the oil cooler, it will extend the life of your oil.

    Remember the turbo is cooled by oil and that sits at an average of 500°C.
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    Default Re: 300 Tdi oil cooler - necessity of?

    antz

    yep
    one with plastic tank

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    Default Re: 300 Tdi oil cooler - necessity of?

    Quote Originally Posted by jfh View Post
    Try to keep the oil cooler, it will extend the life of your oil.

    Remember the turbo is cooled by oil and that sits at an average of 500°C.
    Yikes, yes, that's right. Didn't think of that.



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    Default Re: 300 Tdi oil cooler - necessity of?

    Quote Originally Posted by RossJ View Post
    antz

    yep
    one with plastic tank
    Antz
    You r a spook

    say leak yesterday on the oil cooler side of rad

    While cleaning to trace, the tank is not plastic

    looks like brass - both sides

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    Default Re: 300 Tdi oil cooler - necessity of?

    Quote Originally Posted by RossJ View Post
    Antz
    You r a spook

    say leak yesterday on the oil cooler side of rad

    While cleaning to trace, the tank is not plastic

    looks like brass - both sides
    You sure it's aluminium then? The brass tanks are the old ones with the copper cores as far as I know? The new ones have aluminium cores with plastic tanks.



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    Default Re: 300 Tdi oil cooler - necessity of?

    def alu core

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    Default Re: 300 Tdi oil cooler - necessity of?

    That's interesting. Anyway, you are lucky enough to not have the plastic tanks. I wonder if you can recon, or if you'll need to replace?



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