Excuse me, the cold car jumps in front of the air conditioner, but now the hot car jumps behind the air conditioner. What happened? 1.5 2.0

The cylinder heads of various automobiles are designed and manufactured from different materials. Valve clearance is caused by expansion and contraction of metal when heated, and of course there is wear, but it is mainly caused by different design structures and materials. The gap between cold car and hot car required by various cylinder heads should be adjusted according to the requirements of technical manual, not according to customary experience. For example, the 462 engine used for noodles in the past was very small, while the carburetor engine in Li Xia was very large.

Second, adjust the method. I don't know how you adjusted it. At least you should adjust it with a feeler gauge, not by hand.