408: A lot of heat coming through the firewall.

[Barrie]

I had the same problem with a Jensen CV8 with a 6.3 engine. Apart from fitting heat insulators under the carpet I also had the exhaust wrapped in heatproof tape. (You can do the manifolds as well) This keeps down the air temperature in the engine bay.
Also I installed a Delta fan controller which prevents the engine from getting too hot in the first place. Auto Cooling Additionally it dealt with the occasional fuel vaporisation problem on really hot days and must help to provide desirable cooler air to the carb intake.
Try Summit for parts and advice https://www.summitracing.com/
Let us know how you get on.

[dwomby]

Does anybody happen to know the internal diameter of the heater hose? I'd like to buy the fittings to bypass it temporarily before I drain the coolant and pull the hoses off the heater matrix.

Thanks

David

[AndrewA]

On mine it's 13mm int diameter, 20mm external.

[dwomby]

Originally Posted by AndrewA

On mine it's 13mm int diameter, 20mm external.

Thanks, Andrew. I thought it looked a skinny one!

Looking around the web, I think the heater valve is the same as the Jaguar MK2 C.16559. So that's what I ordered. Time will tell if I got it right.

David

[AndrewA]

More money but probably worth getting a radiator guy to flush out/pressure test the little matrix as well - it wasn't much money in the scheme of things - about £70 from memory...or perhaps one thing at a time!

[David C]

I haven't tried it but ceramic coating the headers is supposed to help keep down under bonnet temperature. Anyone any experience of this?

[AndrewA]

Any progress?