1994 nissan pickup rattle?

[mikewillifordjr]

anyone help? I have a 94 p/u 2.4 it had rattling in the timing area, I put a new chain, guides and tensioner on it. it still has the same rattle on cold start up{loud}, and now and again whenever it sits for more than an hour, you can also hear a rattle while idling. not sure which way to go next, oil pump/ lifters???? Oh, sometimes you can hear a tappet make noise, in the past I put some marvel mystery oil in and it and it goes away quickly, appreciate the help.

[seang]

It's good that you replaced the timing set because you have the model with the plastic backed chain guides, which can be more of a critical situation than with the metal backed guides.

My truck does the same thing you describe, and I just immediately shut it back down and re-start it. When the crankcase was really dirty, sometimes I would have to re-start it 3 or 4 times until the rattling stopped. This prompted me to take measures to clean the crankcase, and now it is much better, only requiring 1 re-start if any at all.

Someone told me that my starter is for sure going to go out after that many uses, but I have been doing this for years now, and without problems. They must be used to old school motors where starters frequently fail, because mine is going strong.

How clean does your oil stay?

[Rev_D21]

Could be slow oil psi build up at the hydraulic rocker arms. I did my timing chain last year and I still get some noise during morning start ups.

http://www.nicoclub.com/articles.php?id=215864