Ah Peter, you may have put your finger on it, there was a small white deposit on the air cleaner box, which I assumed to be dried polish from when I had a senior moment and polished the car, it just cleaned of with a wipe over, but have just had another close look and there is a small mark on the top of the box. When the bonnet is open there is clearance, but using the old bike trick of a bit of plasticine on the top and closing the bonnets there is probably only 0.020in clearance, enough when moving for slight movement to just tap the box. As it's been chucking it down all day I am resisting a test run after a little removal of plastic on the box, snow I can cope with but I don't do rain unless I have to.
Thanks Jay, think I bought all the tie raps in the local shop and added extra raps to everything just in case, anything that looked near anything that it could touch was wrapped in cut up old motorcycle tube.
One thing I did find some time ago was the top and bottom pipes to the radiator were horribly close to various brackets, so a few hours was spent modifying brackets and mountings to give clearance. All was probably just ok in a new car but when mountings etc start wearing I coule see hoses being chaffed and a sudden loss of coolant, which would probably happen in the worst place and time.
