My Cinque has started to gush water out of the header.
I have replaced the thermostat, new rad fitted.
It starts OK but starts to gush as the temp starts to rise.
Have removed the head but cant see any convincing evidence of blowing between cylinders and water ways. Also can see any evidence of cracks in the head between exhaust ports and water ways.
I am considering a head and block skim though would welcome any advice or similar experiences.

cinque gent

I had a similar problem where it would lose water from the header tank cap when hot. . . A HG change didn't actually fix it, but a new cap, combined with proper bleeding of the system was the solution for me.

A proper blredding is very important as are the caps as stated above which do tend to wear out over a few years use. Just use the bleed screw thoroughly and you should be fine.

If this does not fix the solution would be to check all the water pipes for the entire cooling system which could establish why the car is losing water. Header tanks can also be prone to cracking on the sealed joints so just check them by making sure no powdery antifreeze is on the outside of the header tank.

I'd say it's probably a new cap and a good proper bleed. I find the haynes method is toss for bleeding. I usually blow through the header tank and get a helper to tighten the bleed screws when air stops coming through and coolant is

If that doesn't work then I'd try a light skim and a new headgasket, can get the gasket sets off ebay for £15 and if you are competent enough you can do it yourself, you sound it anyway if you've had the head off.

Also, welcome to FF

Thanks for all your help guys.
Re assembled the top end , without a Skim with new head gasket.
New header cap and lots and lots of bleeding and the car now seems to be behaving itself.

Many Thanks

Cinque gent