Talk Morgan Forums Morgan Sports Cars Morgan Plus Four, Supersport & Plus Six (CX & CXV Generation Vehicles) Morgan Radiator issues — Again!!!!!!!!!!

Thank you Thierry.

I am intrigued that reprogramming will benefit radiator integrity. But that seems to be very possible with closed systems. No incorporated mechanical relief feature
I guess. Therefore one must have an ultra precise fuel map that prevents any possibility of heating beyond a certain point. But with no way to politely overflow
under duress, the only remaining option is to spring a leak by compromising the MMC rad welding. The rad would also have to be weaker than the multiple hose
connections! Thermal shock is normally called a "leaking rad".though it was also thought to be to cause of all those LR V8s slipping their liners and their block
cracking. LR was experimenting with warming their engines up faster...an interesting tale for another time. A closed system, if not functioning within very strict
parameters, would have to put immense pressure on running details. Can't easily cure it by changing the rad cap..at least offically.

All this must be fun (not) experimenting for someone on Pickersleigh Road. But getting 5 replacement rads points to a deeper problem of common sense with the
individual who decided upon the system and/or he-who-is-responsible for production this area. Perhaps we can help.

BTW, unlike most, I understand there is a teething period with new ideas and designs. I also am more tolerant of human error than most. I make them often. One
learns very little from success.

gmg

There are two expansion tanks oth with pressure just like other cars.
My understanding is the thermostat is in reality an electrically controlled valve(s).

I was told that the rad supplier insisted mmc only accept as a warranty item their same design that failed before. By 2023 the supplier agreed to a new stronger rad design.

Thank you John!

I do not fully recall the cooling system posted here. Can you point me to it? I also do not recall many other cars with two expansion tanks.


I wonder why. What would be the goal of that level of precision? Musing.


How odd! Forgive me, but was your source from the supplier or the Factory?BTW was the supplier Radshape? It is now called Beakbane
Precision[i] since Radshape declared insolvency and it was immediately sold from receivership in October 2023.


Any idea when those new stronger rads are expected? And in what way they are better? Any idea why this has been going on so long? Not
to worry. I am not trying to put you on the spot. Peter Morgan worried that outsourcing would make the business vulnerable.

l.

The new Lotus with the AMG turbo engine has 2 cooling systems it is very common on turbo cars. I don't have a diagram. One is for the intercooler and the other the traditional radiator & turbo.

The tanks are at the top of the firewall and you can see them in pic 1 for the intercooler behind the heater box and in pic 2 you can see both behind the battery. The ecu is also visible as the cover is removed.



The control I'm guess reduces thermal shock vs an on off mechanical thermostat. 24 cars now don't have the swirl pot either. The rad is stronger as the side design was strengthened.

I have no idea who the supplier was or is .

I find it odd that thermal shock is supposed to be the culprit. Just doesn’t make sense to me due to the volume of coolant involved. Imho more likely is poor welding or under specked metal.

Well this was the explanation given by Morgan Belgium . With the new software the closure or the opening of electronic valves are delayed. Now when they check the radiator if there is a few drop of coolant

the radiator is changed and the waranty extended 2 years (on the radiator). On my 5 radiators i had always only few drops sometimes with nothing on the floor. The radiator seems to be well built and is very

heavy. My car has now 25000 km and since february 2024 the radiator is not leaking . I am crossing my fingers.

Even it is annoying i can't complain about Morgan or garage Albert because they fix the problem at there own cost. It is 12 hours work and it is a small garage with only 3 technicians.

I have one of the first made plus four ( july 2020). Since 2020 the plus four has been improved a lot after the remarks of the customers.

I contacted MCC about my rad leak and did receive a favourable response, asking me to take my car to my nearest dealer for a inspection and report before a replacement rad could be approved, I contacted the one in Cheshire and was told they would not be able to do the inspection before October as they were snowed under with work. So looks like this is going to take a long time to resolve.

You will get the updated rad and a reflash so they cant really do more. If its only a few drips i would use the Mog just keep an eye on the levels. Em

KH said mine was driveable but they dp gp suddenly I understood. KH might be able to help but they are a long way from you ditto Allan White

Booked in with Oakmere for 18th October just for an inspection, it was the earliest they could do, does anybody else experience these difficulties with their local dealer?