bigmalcy

Hi John - good idea, and yes I do have one of those guns. Have you done this yourself?

Hi John - agree there is a blockage somewhere, reducing the ability to get rid of heat. I've just done yet another drain and flush with what I believe to be a stronger flushing agent than the first (big warnings not to leave it in for longer than an hour). To flush the stuff out, I reverse flushed the rad (garden hose on the heater outlet hose), so hopefully that does the trick. I won't know until I get her out on the freeway for a longer run at sustained speed. Wish me luck! PS - I had coffee with the Register members down here a few days back... a lot of good info from them.

Hi fellas - trust me... this car's cooling was spot on for years... with standard stat, bypass restrictor and with or without cardboard thingo... until some clod neglected her for too long and she decided enough was enough. I found this post interesting... seems to match my initial experience perfectly (water loss but no obvious leaks from anywhere and reduced cooling performance). Particularly the last comment from Vivdownunder... On rare occasions the engine releases rust particles that clog the top of the tubes. The top tank then banks up and forces coolant past the radiator ca

Hi fellas Thanks for the input. Hamish - I get worried if the needle goes past the 185 mark, simply because under normal circumstances, even in hot weather and traffic, it never really spends any time up there, before the very effective Kenlowe fan kicks in. It's interesting that yours spends so much time hotter... makes me feel better! I don't have the cardboard duct, but I do have the bypass restricted. The duct didn't really seem to make much of a difference in my case: at least when I removed it, I noticed no appreciable rise in temps. Timing hasn't changed to the best

Hi folks So today I took the old girl for a drive to test the cooling system and overdrive and she went beautifully, but unfortunately she is still overheating when running at steady higher speeds (50mph +). The needle just creeps up very slowly above the usual spot in the middle of the gauge and shows no signs of stopping, without pulling over of course. On all other roads, where speeds are variable, the cooling system keeps up just fine. There are now no signs at all of coolant leaks. It seems to me that there isn't enough flow through the system to get rid of the heat generat