External oil cooler for 300tdi - Defender Source
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  #1  
Old October 28th, 2010, 02:55 AM
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External oil cooler for 300tdi

In the past I saw an upgraded radiator and oil cooler installed in a D90 in which the oil cooler was a long, narrow full-width cooler mounted low behind the body panel which sits below the front grill. Now I can't find the thing.

I think it was in regards to an upgraded radiator (full width) and intercooler (ditto) where you have to move the oil cooler external because the new radiator didn't have an integral one. I know Allisport makes one, but really I just want to add extra oil cooling so I was thinking of daisy-chaining the radiator-oil cooler to an external one..

Has anyone seen the oil cooler I am thinking of?
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  #2  
Old October 28th, 2010, 12:16 PM
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I have a '97 with an automatic transmission. The factory, full width transmission fluid cooler, is mounted in the position you refer to, below the stock radiator. I don't know if the internal tubing size of that cooler is suitable to cool engine oil vs transmission fluid.

Dennis
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Old October 28th, 2010, 01:23 PM
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On my old 300 90, i had an ex TD radiator, which is full width (As there was no I/C on the TD but also had the oil cooler in built.)

worked a treat. even the military who use their Tdi's hard never seem to suffer from overheated oil.
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Old October 28th, 2010, 05:20 PM
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I think you are reffering to Tony Brooks (ABrooks) truck. The radiator was a Pendy creation.
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Old October 28th, 2010, 06:15 PM
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the factory Tdi come with an oil cooler, even with a/c.
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Old October 31st, 2010, 03:23 PM
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Maybe that was the truck I saw - I didn't realize Pendy was fabbing radiators. Is there anything he can't make? ;-)

Interesting idea regarding using the trans cooler - I see plenty for sale on eBay, but they are all Disco models. I think the radiator bay on the D90/Disco are pretty similar... so, would something like this be close enough in size on the D90 to be made to fit?

Land-Rover-Discovery-Engine-Oil-Cooler

Also, does anyone know the line size? I'd not want to restrict oil flow to the point I lose significant pressure. I asked the seller and his answer was along the lines of "I don't know and because a tape measure is not sitting in my lap I'm not going to find out".
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Old October 31st, 2010, 04:34 PM
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This what you are after?
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Old October 31st, 2010, 06:04 PM
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Wow, that looks much beefier than the factory unit. Does it cool as well as those? Is that a hydraulic fluid cooler adapted for the truck?

I have a paranoia about overheating since my old 3.9 blew two head gaskets and dropped a sleeve. The 300TDI runs fine coolant-temperature wise so far (even with the AC on in mid-90 temps last week) but I see the oil pressure go from 50psi when cold and freshly on the freeway to 22psi hot after running along the freeway for a half an hour - seems like quite a drop to me. While the coolant temp is fine and the oil pressure is satisfactorily in spec (at idle when hot never below 18psi) I feel that if I can keep the oil cooler my OP will stay higher... and higher OP makes me feel warm and fuzzy.
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  #9  
Old November 29th, 2010, 05:28 PM
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Pendy, that looks like a Derale unit, but the only ones I see on their website are 3/8" NPT inlets. The oil lines appear to be 1/2" on the truck.

http://www.summitracing.com/parts/DER-13252/?rtype=10

Is this a Derale cooler 'heat sink' cooler? What size lines do you have going to it? 3/8" seems restrictive. If it's not a Derale, what was your source?
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  #10  
Old November 30th, 2010, 03:08 AM
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I sell them.
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  #11  
Old November 30th, 2010, 09:26 AM
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The one I wound up using was a plate cooler attached to the face of the front crossmember.

Similar to: http://www.summitracing.com/parts/BMM-70265/
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