muddy4x4xfar Posted June 22, 2022 Share Posted June 22, 2022 Hi All. Im installing a 3.9 v8 auto into my defender. Im in the process of modifying the chassis in order to fit everything required. I have looked online but there seems to be a few different things come up and I don't know which is right. Does anyone have any photos of a defender 3.9 v8 radiator and the mounts on the chassis side including measurements as to where they weld to. Also any measurements or part numbers for the correct radiator for this engine with oil cooler please. Thank you Quote Link to comment Share on other sites More sharing options...
Junglie Posted June 22, 2022 Share Posted June 22, 2022 What are you modifying from? I'm fairly sure that I was advised a while back that the radiator which came with my 12J would be fine for the 3.9 V8 I'm fitting instead, so no changes needed (though obviously I need to change the chassis mounts). I am using a pair of electric fans from a Freelander as well. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 22, 2022 Share Posted June 22, 2022 I'm not sure there is a "correct" radiator with oil cooler, the V8 ones didn't have it, the intercooled TDi's had an oil cooler but a smaller rad to make room for the intercooler... a TD rad might do it but the pipes could all be in the wrong places for a V8. I'd look at running a stock V8 rad and either tuck a RR bog-brush oil cooler in front of the rad or tuck a universal Mocal-style oil cooler in front. I'm running a 4.6 with no oil cooler on a stock V8 rad + freelander fans with no issues. Quote Link to comment Share on other sites More sharing options...
Mossberg Posted June 22, 2022 Share Posted June 22, 2022 I had a 1991 3.9 efi. That had an oil cooler in the rad plus a bog-brush cooler too. I think the bog-brush was for the auto box. 1 Quote Link to comment Share on other sites More sharing options...
Phill S Posted June 23, 2022 Share Posted June 23, 2022 I've been planning to fit the 19J rad with integral oil cooler. Its a relatively thick unit... Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 23, 2022 Share Posted June 23, 2022 Are you trying to cool engine oil, gearbox oil, or both? I'm fairly sure the autobox wants a cooler, but I'm certain the engine oil can live without one as both mine do quite happilyand I've got the temperature monitoring stickers to prove t. Quote Link to comment Share on other sites More sharing options...
muddy4x4xfar Posted June 23, 2022 Author Share Posted June 23, 2022 1 hour ago, FridgeFreezer said: Are you trying to cool engine oil, gearbox oil, or both? I'm fairly sure the autobox wants a cooler, but I'm certain the engine oil can live without one as both mine do quite happilyand I've got the temperature monitoring stickers to prove t. Im putting the gearbox on a separate cooler. Ideally was looking to have the engine coolant and oil on the same radiator if possible. Quote Link to comment Share on other sites More sharing options...
Phill S Posted June 23, 2022 Share Posted June 23, 2022 (edited) I've recently dismantled a 1997 Disco 1 with 3.9 V8 and auto box. The radiator has provision for cooling of the engine oil and auto box, the cooling for that continued on into a bog brush type cooler. I'd very interested to know what exactly is inside that radiator. The engine is going into my 1987 110 with manual box, and I'm planning to use the 19J radiator with oil cooler built in: The 19J radiator with oil cooler is (I believe) NTC6168 and is the one to the left in the pic. This is about the same thickness as the Disco 1 rad. To the right is the one that came out of my 2.5 NA diesel, and I believe this is ESR79. The 19J one is about half as thick again. My original one isn't going to do the job! I'll be very interested to know which way you go... Edited June 23, 2022 by Phill S Quote Link to comment Share on other sites More sharing options...
Mossberg Posted June 24, 2022 Share Posted June 24, 2022 https://www.adrad.co.uk/prices/prices.php?type=radiator&id=LR817&model=DISCOVERY&make=LAND ROVER I think this is similar to the radiator that was in my 3.9 efi. If you look there are some dimensions on this page. Quote Link to comment Share on other sites More sharing options...
Phill S Posted June 29, 2022 Share Posted June 29, 2022 On 6/22/2022 at 9:43 PM, FridgeFreezer said: I'd look at running a stock V8 rad Is that the ESR203 radiator? I'd be interested to know how thick yours is. The only V8 rad description I could find in terms of dimensions is here: https://www.alutec.co.uk/?page=search&stype=completes&sby=sbp&spartno=10221&comps_manu=&comps_model=Defender++110&comps_spec=2.5+TDi+200+Hardtop&comps_from=09%2F90&comps_to=12%2F94 ...which gives 47mm which seems a bit skinny. They also give a pic of the guts of the oil cooler: Which is interesting. Got a nasty shock the other day when I called my local radiator re-core outfit - my 19J radiator shown above would come out at £600 plus VAT, so that's not going to happen. So what rad to go for? The only affordable all metal (or looks like it might be in the pics) ESR203 V8 job I can find is from Britpart. Anybody have any suggestions for a good quality unit at a reasonable price? Quote Link to comment Share on other sites More sharing options...
DavidW Posted July 19, 2022 Share Posted July 19, 2022 On 6/23/2022 at 8:15 AM, Phill S said: I've been planning to fit the 19J rad with integral oil cooler. Its a relatively thick unit... I've done this. It works fine. Quote Link to comment Share on other sites More sharing options...
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