Are BMW having similar rad problems? The Morgan rad....is it the same as a BMW ? I doubt it due to fit in the car. It is likely to have a similar cooling capacity spec (same engine) with, perhaps, modifications to deal with different airflow.
Where exactly are the leaks? The core, the tanks, the pipes, the hose fitting? How much vibration damping is there? What pressure is the system working at?
I would guess MMC have/are looking at these factors.
If the leaks are at the hose mounts then how many beads are on the rad pipes and is a sealant used?
Are the rads pressure tested at manufacture? In the factory I worked in every rad went through a test process for leaks. Mainstream BL , small manufacturers ( (JCB, London taxi, Caterham, special MOD vehicles and many more).
These CX problems look like a recurrence of the early M3W problems.
Who is troubleshooting the problems? What is the relationship to suppliers for quality?
The radiator and chargecooler are bespoke aluminium fabrications to Morgan and different between the Plus 4 and SIx
The leaks i am aware of are at the welded junctions were the inlet/outlets join the radiator tank
I have my own views on how the radiator is mounted and the cause of the failures- I believe the factory are on iteration 7 of the mounting...
I don't believe it is thermal shock and i fear the latest swirl pot addition will not fix the problem
The radiators are all pressure tested at manufacture- although one failure I know of within 80 miles led to comments about Stevie Wonder doing the inspections...
