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Engine Coolant Radiator
Had a few drips of coolant from the radiator when I cold pressure tested it a while back,
as with most parts, I'm sure it will fail at a most inconvenient moment, so what options are 
there ?
New radiator from vauxhall ?......actually not sure, but most likely NLS
Refurbish existing radiator ? ........don't much like the idea.
Custom built radiator ?.........perhaps..........
Found a supplier of "blank radiators" in America and the UK importer.
Had this turn up the other day ! All I need do is cut the holes and weld on various pipes.
I needed 35mm dia , but have 1 1/2" stub pipes on order, bigger but will try them anyway.
It's a 19"x28"(actual 27 1/8")x 60mm thick core, according to the catalog.
How does it measure up to the standard radiator ?
Std LC rad is      740mm long x 495mm high x 45mm thick  46row  (end tanks volume comb approx 2.350ltr) 
Aluminium rad is 690mm long x 495mm high x 60mm thick   43row (end tanks volume comb approx 3.487ltr)
I suppose you could say the aluminium rad exposes more surface area for cooling than the std rad....maybe.
Certainly it appears to hold more coolant, at least going by the end tanks.
Actually the LC radiator looks like it has a combined oil cooler/heater within one of the end tanks !
This must waste coolant capacity.
This is the bottom hose connection, I'm amazed by how much the unused oil cooler core may be restricting coolant 
flow. The radiator is adequate from a standard point of view, otherwise there would have been far more problems 
with cooling at development stage, but even so, I and quite surprised by this feature ! It must compromise cooling 
efficiency during hard use in hot weather, or just being stuck in traffic 





Aluminium rad left, LC rad centre, senator rad right.

The expansion stub on the LC rad is 18.5mm diameter, the pipe on the expansion level tank is only .........
12.3mm diameter, however the reinforcing tube reduces the inside bore to ..............
about 6mm, so, I'm thinking about welding a smaller pipe ie 15mm dia on the radiator, sleeving the expansion tank 
connection, then I can use some standard heater hose, making the LC specific (NLS ??) hose redundant.

Scrap that idea, I found correct size 19mm stub pipe, so will use the OE hose afterall........

Does it fit in the hole.....yep !
But because the overall length is 2" shorter, I will probably move the rubber bungs over one hole.
Looking down each side of the rad when installed........
Bracketry should be fairly easy, just weld to each side.
Because the radiator is 2" shorter than the std LC one, I need to think about some wind deflectors to stop air going around
sides and not through the rad.
I think even the top fan shroud could be modified (butchered ;-) to fit back into place.
The radiator core thickness is 60mm, 15mm thicker than the std LC rad, so this will bring the back face of the rad 
closer to the viscous fan blades (not looking to dispose of this item....yet) 
There is at least 20mm clearance, the blades will have to flex quite a lot to catch the radiator core, however something to bear 
in mind ! (I never noticed just how much the engine seems to be out of square to the centre line of the car, one side of the fan 
blade is closer by about 6mm compared to the other side. 
I think I will go with this rad, cut the holes weld on the pipes, measure the coolant volumes, see how fast it drains compared 
to the std LC rad, and rig up a basic test to see how quickly each rad can lose heat.
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