I have it on good authority that an aluminum radiator is a bit inferior to a standard Morgan Radiator when it come to heat transfer. However; the Alloy radiator is quite a lot lighter and because it is welded rather than soldered is more robust than a standard Morgan Radiator. Plus if built by a very good craftsman (Peter Mulberry) gives very good service. I am using a +8 Morgan Radiator (second owner) given to Me by a friend in Denver that purchased an alloy radiator. This radiator has been faultless. I also purchased a Replica Morgan Radiator which is a copy of a '60's radiator only with upgraded materials and craftsmanship. Also over 50,000 miles and faultless. Not sure where the DHC (,61) radiator came from but with less miles seems OK. Looks to Me it comes down to CRAFTSMANSHIP!
Button Seattle
Ah yes......but what Morgan radiator are you referring to? You cannot compare the older radiators to those of more current cars. The Williams alloy radiator which I had fitted to my 3 litre Morgan last year works well in all temperatures. The fan still comes on in heavy traffic in stop start motoring but then this is to be expected with little airflow through the core. I think that there is little to choose between the radiators from Williams or Mulfab, they differ a little in construction and mounting but both are superior to the standard radiator.
Jays Former Morgan owner. Gone but hopefully not forgotten!
Ah yes......but what Morgan radiator are you referring to? You cannot compare the older radiators to those of more current cars.
Not too sure, but I think they all are a modern core. (what ever that means).
+8 Bitsa - I do have heat problems - SPAL Fan in front - at 70MPH climbing a long hill I heat up. Think fan becomes a blocker - If I would mount the fan in back of the rad - problem probably solved. I just slow down.
'63 +4-4Str - Replica of Original Rad - Mechanical Fan with Flexalite fan blade - (I can cut the blade to make it pull more or less air - noisy if not cut) - Also fabricated a shroud that fits behind the rad (designed by a Texan)
'61 DHC - Flexilite Honda Fan with shroud mounted to back of rad. I will try to post pictures of the +4 & DHC
Hello Thank you very much for your comments. Perhaps it is a problem of the airflow, Beltempo wrote. I have a meshgrill behind the grill and perhaps this reduces the airflow. But I think the meshgrill is important to prevent stone hits which can damage the radiator. I also have the Brooklands front splitter which also reduce the flow. I drive a lot in the alpes were you drive with low speed and hard work for the engine. Therefore I think it will make sense to replace the radiator to a bigger one.
I also have a 3.7 Roadster - bought new last year. The fan comes on at low speeds (crawling in traffic) and when the car is stationary but goes off as soon as I get moving. The engine temperature is fine and so I have always assumed this was a feature of the settings on the fan thermostat and that it is not a problem with overheating. It may be worth investigating this before fitting a new radiator.
2015 Roadster 3.7
