Thread: new radiator for TD5, please explain

The lower section of the radiator has a separate section for cooling the water from the fuel cooler.
It appears from reading the blurb the new radiator doesn't have this feature.
To get around it they offer the restrictor to connect the fuel cooler hoses to.

I bought a radiator via this forum and drilled the blanked sections out as barbs where fitted for hoses.
I expect on the new one your looking at this can't be done.

Do you have a link or picture to confirm?

Originally Posted by bob10

Before the wife retires, & we go for a long drive, one of the things I would like to do is refurbish the cooling system. Apart from the hoses etc, with 364,000 kms on the clock, a new radiator might be in order. I have been looking, one mob has this spiel to go with their new radiator, not sure what to make of it, I thought it would have been just a simple swap. I have a 1999 [ although vin check says it is 2000] model TD5, cheers, Bob

This is a new Radiator to suit Discovery 2 TD5 5 cylinder diesel 1999-2004. The core of this radiator measures 440mm in height and 590mm in length.
When fitting a new TD5 Discovery radiator you need to fit a fuel cooler restrictor (part no. PCS000010), to restrict the flow of the water/coolant. This restrictor fits into the front end of the fuel cooler which is underneath the inlet manifold on the driver's side. The new radiator will have no holes at the bottom, they are blanked off. The hoses go back onto these blanking plugs the same as they came off the old radiator.

Radiator design was changed in 2002. The quote describes the part you need when using one of the new spec radiators on vehicles built prior to 2A736340.

Tech bulletin describing the change and implications attached.

cheers
Paul

Originally Posted by alien

The lower section of the radiator has a separate section for cooling the water from the fuel cooler.
It appears from reading the blurb the new radiator doesn't have this feature.
To get around it they offer the restrictor to connect the fuel cooler hoses to.

I bought a radiator via this forum and drilled the blanked sections out as barbs where fitted for hoses.
I expect on the new one your looking at this can't be done.

Do you have a link or picture to confirm?

Here is a photo.


What I find difficult to understand is, the two spigots are there, and looking at the drawing " COOLING SYSTEM - TD5 , Cooling system coolant flow", from RAVE, the restrictor is placed in the inlet side of the fuel cooler, coming from the bottom spigot on the radiator. Coolant from the OIL cooler outlet, via the secret hose, around the back of the engine, flows to the radiator via the top spigot. If those spigots are blanked off, surely that adversely effects coolant flow. No doubt LR engineers have engineered a solution, but what? Is there an upgraded drawing? Bob

I drilled the blank spigot (small hole) as I figured to have a pipe blanked from the oil cooler dead and unable to purge the air could not be a good thing.
Why not blank off oil cooler outlet and delete the pipe completely.
I did not fit restrictor maybe I should...
Regards

Good morning bob 10,i recently bought and fitted a new radiator to my 99 d2 td5 the radiator i got (of ebay) there's no drilling or anything it seemed to be straight swap over,nice and easy job only took about 1/2 the day cleaned out the intercooler while it was out and replace the intercooler pipes as well, i did mine with the fan still in but would of been a lot easier if it was removed.
1 Radiator Landrover Discovery Series 2 II TD5 Auto Manual '99 '04 Turbo Diesel | eBay

Originally Posted by northiam

I drilled the blank spigot (small hole) as I figured to have a pipe blanked from the oil cooler dead and unable to purge the air could not be a good thing.
Why not blank off oil cooler outlet and delete the pipe completely.
I did not fit restrictor maybe I should...
Regards

I've been reading the cooling system description in RAVE, trying to understand the system, bit of a slog. There are two conflicting statements, regarding the oil cooler return pipe.
From " the cooling system TD5";

1. Oil cooler

The oil cooler is located on the left hand side of the engine block behind the oil centrifuge & oil filter. Oil from the oil pump is passed thru a heat exchanger which is surrounded by coolant in a housing on the side of the engine. Full water pump flow is directed along the cooler housing which also distributes the flow evenly along the block into 3 core holes for cylinder cooling. this cools the engine oil before it is passed into the engine. A small percentage of the coolant from the oil cooler passes into a metal pipe behind the engine.[ via the secret hose] It then flows into the lower radiator via a hose.

2. From " engine TD5 "

Coolant flow circulates thru the oil cooler housing under pressure from the coolant pump & distributes the flow evenly around the matrix fins & then along the block into 3 core holes for cylinder cooling. Coolant enters the oil cooler through a pipe with a rubber hose extension at the rear side of the engine [ secret hose] I believe this statement to be incorrect, & statement 1 to be correct. If you look at Offtracks post of the technical bulletin, [bottom of page]you will see the top spigot is blanked off, the bottom one seems to have a small orifice to allow some water flow to the fuel cooler. I am assuming the new radiators do not have the 4 pass section in the bottom for the fuel cooler as the original ones do, & therefore you would be getting full water pump pressure at the inlet of the fuel cooler. So, what have I got out of this besides a headache, and the need for a cleansing ale?

Coolant flow to the oil cooler comes direct from the water pump, thru the engine jacket, to the oil cooler , into the pistons & out the outlet housing to the top of the radiator. So blanking off the top spigot should not effect the flow of coolant to the oil cooler. As a matter of fact, I don't see a reason to have that secret hose at all, if I am correct.

Full water pump pressure is pumped thru the small orifice in the bottom spigot to the inlet of the fuel cooler, so yes, you must fit the restrictor. Of course, I'm hoping the original radiator is still available, but if not I'm happy to replace it with the new one. My head hurts, what time does the footy club open? Bob PS, don't drill the blanked holes at the bottom of the radiator


L8711bu.pdf (770.4 KB, 27 views)

Originally Posted by mrjc

Good morning bob 10,i recently bought and fitted a new radiator to my 99 d2 td5 the radiator i got (of ebay) there's no drilling or anything it seemed to be straight swap over,nice and easy job only took about 1/2 the day cleaned out the intercooler while it was out and replace the intercooler pipes as well, i did mine with the fan still in but would of been a lot easier if it was removed.
1 Radiator Landrover Discovery Series 2 II TD5 Auto Manual '99 '04 Turbo Diesel | eBay

Thanks for that, what did you use to clean your intercooler? Bob

Originally Posted by mrjc

Good morning bob 10,i recently bought and fitted a new radiator to my 99 d2 td5 the radiator i got (of ebay) there's no drilling or anything it seemed to be straight swap over,nice and easy job only took about 1/2 the day cleaned out the intercooler while it was out and replace the intercooler pipes as well, i did mine with the fan still in but would of been a lot easier if it was removed.
1 Radiator Landrover Discovery Series 2 II TD5 Auto Manual '99 '04 Turbo Diesel | eBay

Hi bob 10, i just used liquid and spray degreaser i bought from supercheap, just sprayed the outside and then filled it up with the liquid stuff(watered down) let it soak for about an hour then gave it a good rinse,left it dry in the sun for a couple of hours it was 29 that day so didn't take long,bob also take a quick look underneath your top radiator hose were the pipe that branches out and sits on top of the air con pipes is it has the mesh over it,these can rub through and leak as mine did i had to replace with a new one and cable tie this bit of pipe back so it didn't rub.