hi guys on a recent jolly out to manchester i found my car on the way home at a steady 70mph overheating so i got to the services n pulled over,just as i got in to the services my car starts smoking and cuts out and the steam poors through the vents i leave it to cool down and try to restart "no compression" so i get the car to mine strip the engine and i can find no visible signs of detanation or when checking the bores visually and with a feeler gauge theres no play or signs of damage im really puzzled as to what it could be.im putting a new re-con head, head gasket and belts on this weekend so i myt just hav2 see but any advice or therories please msg as im a bit lossed with this 1 ....cheers