I have a 90 Nissan Stanza XE with the KA24E engine and the timing chain is rattling (especially when the engine starts). I assume it and the guides need replacement (120k miles). What parts need to come off to get the Timing chain cover off? The Chilton book says undo the engine mount and lower the engine some, what is the reason for this? As most people know the Chilton books are sometimes vague and not always model (engine type)specific. If anyone can advise me on the procedure to fix this, or to some good sites, I sure would appreciate it.