I have just got an Alaskan malamute he is only 14 weeks and when we got home he drank around 4 bowls of water little bowls then threw it up I thought was because it was a long car journey and it was his first night and the house was really warm he seems fine but has a bit of saliva any ideas

Poor pup! It does sound like he may have been thirsty and a bit nauseous after the car ride, then vomited due to drinking too much water, too fast. Some excessive saliva or drooling at this point is not surprising, since this is usually a sign of nausea - he may still be feeling a bit ill from throwing up. If he is acting normal otherwise, I would suggest picking up his water bowl overnight to give his stomach a chance to settle. In the morning, you can feed him a small meal and offer water again, in small amounts at a time if he seems inclined to drink too much at once. If he has no further issues, then you shouldn't need to worry. If he continues to vomit during the night tonight, or if he is acting lethargic or not wanting to eat tomorrow morning, it would be best to have him examined by a vet since these could be signs of a more serious problem.