Good progress have you got anywhere further with the running issue
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gruffalo wrote:I popped the intake today, and pressurized the cooling system using compressed air.
The leak revealed itself. It was the lower part of the Y-pipe that was leaking. It may be that I forgot to tighten the clamp, but upon tightening it started skipping the threads. So basically the hose clamps are crap.
The previous owner got a full hose/clamp kit from John Hervey, and I’ve used them all over the car. If it turns out that they are useless crap, well, I have a lot of work ahead of me.