I am in the process of replacing the timing chain in my 98 Altima GXE (2.4L). Is it recommended to replace the oil pump at the same time?
No oil pressure issues. The original equipment timing guide which was all composite broke and allowed the chain to slip enough that the engine wouldn't run I've already verified that no valves were bent so it's really just replacing the timing chain.The oil pump is part of the front cover assembly and they are pretty reliable. Unless you had oil pressure issues, I would leave the pump alone.
Yes, there should be two. Ask a Nissan dealer parts guy to look it up in his catalog. Otherwise get one from a junk yard or have a machine shop make one.I received the cylinder head and block back from the machine shop and only one alignment dowel is there for head to block alignment. I assume there should be two. If the machine shop can't find the second one, does anyone know where I can get a replacement?