Overheating RP

[Bob Kneale]

This occurred many years ago in my Ruby, and it was traced to a seriouslly furred up cylinder head, cauased probably by a long and exciting life in a hard water area! The solution was to remove the head and drill out the holes in the cooling passages which were a fraction of the diameter they should have been.

Take care not to remove any metal in the process.

Cheers
Bob

[Bob Culver]

On Jowett cars severe overheating has been experienced by cyl liners porus from new but which suddenly shows decades later. A corroded engine would be similar.

[David Witton]

Rick, bottom hose kinked or collapsed internally? Is it an original rad core?

[Rick F]

Thanks again,

Ruairidh - head is currently off and I am a bit under the weather with man-flu ( a slight cold!), but will reassemble the engine and check as you suggest.

Hedd - I have a large, redundant beer fermenter and will try your suggestion after Ruairidh's.

Dave - I think its an original rad and the hoses are OK.

[Rick F]

Cold mended and back at work!

Ran the car today without fan and checked the radiator. One-third to a half of it cold after five minutes. Got some rad flush and ran for further ten minutes as directed. Things seem to be improving, so have left it soaking overnight.

[Hedd_Jones]

Oxalic acid. Bought in powder form off ebay cleans out blocks and heads superbly (mixed at 2 or 3 times the dose on the box). Not so good on rads. Put a cork in the side water manifold and fill her up to thw top of the top water manifold to fester a week or so. Then flush her out. The fluid will come out green

[Reckless Rat]

Beware of Oxalic acid. It is extremely poisonous. Wear protective clothing when handling it.
It occurs naturally in rhubarb leaves but not the stalks.

[Hedd_Jones]

I wasnt advocating anyone bathed in it or drank the stuff.

But I can confirm it is excellent, if a trifle agressive at removing limescale from the bath

[Zetomagneto]

Oxalic acid. Bought in powder form off ebay cleans out blocks and heads superbly (mixed at 2 or 3 times the dose on the box). Not so good on rads. Put a cork in the side water manifold and fill her up to thw top of the top water manifold to fester a week or so. Then flush her out. The fluid will come out green

This works well on ferrous metals,      https://www.bilthamber.com/corrosion-pro...nts/deox-c      did a couple of blocks with it, stripped them down inc removing coreplugs, degreased and left them soaking for a week, no rust or corrosion in sight.

[Rick F]

Disappointing progress - or lack of it! Another run up after an overnight soak and there is virtually no improvement.

Does anyone have any idea how a water jet might be introduced to blow the crud out - short of removing the top or bottom tank?