Hello, when I start my van when it's cold, there is alot of valve noise and clacking noise coming from the engine. However, wheb the engine is warming up there is sound at first but later it is gone. Any help would be appreciated. Thank you for your time.
Hard to say without hearing noise , but a lot of noises are caused by low oil pressure at start up and oil not fully circulating. Can be caused by general engine wear , worn oil pump , timing chain rattle but many other possible causes .If engine oil and filter not been changed for a while , might be worth a try .