"hot spots" and overheating

[Dieter H. Marschall]

Good morning everybody,

As I wrote in another thread I am concerned about the reasons for overheating, as that problem hit me recently. I did some reading and came across Tony Hart's thoughts about one possible reason: "hot spots" due to the fact that during the initial overheating the bottom of the pistons expanded. This seems to lead to scratches in the pistons and cylinder walls. When driving again the pistons expand slightly. This seems to lead to friction between pistons and cylinders in the scratched areas and thus lead to excessive heat and overheating again.

What are your views on this topic? Is it just a possible, but unlikely scenario or is it likely to happen again once you had this overheating and did not pull the pistons for checking?

Thank you very much in advance for your time and effort.

Kind regards, Dieter.

[V8 Rumbler]

imported post

Dieter

Overheating/preventing overheating is probably the most discussed topic--do a search and you will see.

The Stag cooling system is adaquate when it is in top shape.

A yearly flush/coolant change is critical.

Most, if not all Stag engines left the factory with casting sand still inside them. Most, if not all will have had their engines rebuilt and the sand cleared out by now.

Darren

[martin]

imported post

Hi Deiter, I certainly wouldn't pull the engine out looking for the answer, it's much more likely to be an old, partly blocked radiator, low coolant, or dirty waterways. Have you checked the coolant level in the rad, not just in the expansion bottle ? Martin.