I just had the timing chain, tensioner, banana rail, upper slide rail, pressure spring and the 2 upper sprockets changed at 375,000. All of these items were original. Due to age, mileage and stretch 5 degrees it was probably time. If your chain stretch is under 5 degrees and you change the oil regularlly you are OK. At the same time, the injectors were changed, also original. Generally I have heard injectors are good for 200,000 plus. I think I was pushing it. Also had the new model of rack dampener bolt changed, $18 item. Engine runs great. I'm getting better mileage, engine is quieter. Idles more smoothly due to injectors and new mod bolt. The 5 cylinder diesels are very easy on their timing chains. Keep an eye on the stretch degrees.

Eric Eliel
377,000 84 300D
Original Engine
Original Trans.