问：3部分问题。我有一个1994年的克莱斯勒LHS，那是正时皮的熄灭

3.5 LTR V6是干扰引擎。这意味着阀门和活塞占据相同的空间，但在不同的时间。正时皮带可在适当的时间内保持凸轮和曲轴旋转，因此阀门和活塞不会同时占据相同的空间。当正时皮带断裂时，从发动机内部旋转和阀弹簧压力的动量开始，阀门将猛击闭合，活塞将击中它们。很可能会有多个阀弯曲并可能的活塞损坏。确定活塞是否损坏的最简单方法是卸下火花塞，并用孔孔向下看每个圆柱体检查活塞。如果活塞没有损坏，则阀门作业将使引擎再次运行。但是，通常更具成本效益的速度是用再制造单元更换气缸盖。新头部的额外费用将超过您受损的头部的人工和加工费用。这是一个宽阔的窗口，但预计成本在2500-5000美元之间。 As far as is it worth it to repair, that is a subjective opinion that you should answer. Is the car in overall good shape ? Has it been reliable ? Are there other issues that need to be addressed ? What is the value of the vehicle ? Check sites like Kelly Blue Book (kbb.com). If for example, the vehicle has a retail or trade in value of $3000, and it costs $5000 to repair and get running, it is still a $3000 vehicle. It’s worth does not increase by the repair amount.