Radiator - is it big enough?

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Originally Posted by justinc

I wouldn't sweat 95 degrees. I have seen a heavily loaded intercooled 120" flat biscuit up hills on a 'warm day' (28 degrees) hit these numbers, it has a new Td5 defender alloy rad and intercooler with standard fixed fan, and 700 degrees EGT under full noise with a camper on the tray, GVM around 3.2T. Mine is around the same working hard towing, new original county V8 rad and fixed fan. Both of us are rad- intercooler- A/C condenser-winch etc out the front.

JC

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JC, I know you've said before that the TD5 rad works with the Isuzu.

Is it pretty much a fit up hose wise ?

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Originally Posted by rick130

JC, I know you've said before that the TD5 rad works with the Isuzu.

Is it pretty much a fit up hose wise ?

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Hi Rick,

Yes it was, the factory Td5 side mountings for the IC and rad are a direct bolt in to the 110, (1990 4bd1) we just had to fab the lower pedastals which was a piece of cake as we had a vehicle available to measure up. The hoses we used a mixture of Tdi elbows and straight sections, and a Td5 steel pipe from turbo to intercooler and only had to fabricate the elbow to the intake manifold from 2.5" tube. We used 2 Tdi top intercooler hoses, one at the inlet and one at the outlet of the IC, and a Tdi elbow from the turbo to the steel pressure side pipework . this was done so spares are easily available. Also, all the rad hoses are standard 110 4bd1 but cut and rotated using steel joiners to fit the td5 rad angles. This allows again for factory available spares that just need cutting and fitting. A T piece in lower hose joiner allows for a Tdi expansion bottle too.

JC

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Originally Posted by 1103.9TDI

Hey c.h.i.e.f, is it much quieter underbonnet without the engine driven fan operating all the time?

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Sorry for late reply
um i cant say i heard a difference in noise but my vehicle is not a daily driver its more of an "experiment" it also has no sound proofing and cannot really hear over turbo whistle..
The radiator i am using is the original and now has a tiny crack that opens up once the temps get to high and hence leaks but all i can say is the thermo fan does cool quite well and as you would know the original fan is only 4 bolts..
The main reason i removed the fan was to see if there was any tiny gains in performance which i cant tell if there was gains or not haha

The horizontal cooling fins are much heavier than normal ones and it should have a tag on the top with Natra and AYG2739 on it.

My Isuzu rad is a Natra AYG 2739 B

Any idea what the B means ?

Might stand for brass (brass core) maybe ????
So how are you finding your natrad radiator ?

If you mean me chief then yes , very good, even with the d Gas injection which I imagine may raise operating temps.

Have not had a run all loaded up in warm weather yet but that will come next weekend when heading off to Dargo for the LROCV base camp weekend with a Goldstream camper in tow and hopefully the aircond refitted.

I'd be a bit suspect about that sort of rise, my radiator (AYG) is still the original, with a few lines blocked off, and even in really warm weather, chugging through sand it never varies any more than 1 or 2 degrees, hardly noticeable.

I've also been using one of these TEFBA :: Engine cooling system Radiator filters :: Easy to CLEAN for years now, and it has caught a lot of metal running through the cooling system. At first I was checking it every day, but now only after a good shakeup. Also makes it much easier to fill and the water/coolant stays nicely clear.

I have nothing whatsoever to do with tefba, but I do like the product.

Just had my radiator rebuilt, new core and tanks, and was lucky enough to stumble on to the man who rebuilds the military isuzu's. Recons the heavier military radiators have staggered vertical cooling channnels so they can wash the sand out easier. The cheaper replacement cores have the cooling channels inline with each other.