[super240s14]

Originally Posted by projectRDM

Why? I answered your question.

The timing chain service interval is a suggested guide. True, Nissan would like people to bring their cars in to get raped every 100k miles, but in reality a chain does not wear like a belt. I've seen engines with the original parts last 300k miles, some even under boost, but I've also seen them last 40k miles due to the top guide breaking off and wedging into the chain, shearing the cam sprockets off. This is experience gained from tearing down, stripping, rebuilding, and/or boosting over 100 of these engines in the past 15 years. I'm not just guessing because I read a blog where some kid's neighbor's brother's uncle said it because he heard voices while jacking off to chicken porn. If you don't want an experienced answer, don't ask the question.

It is common knowledge that both the top and upper guides be removed from any running KA before they break or begin to wear excessively on the upper chain, which in turn could do more damage and require you to rebuild if not replace the entire engine due to interference from piston/valve contact and such. Since this is such common knowledge, and it's also the obvious culprit of the noise you hear, why not remove them both first (and visually inspect the upper chain, cam sprockets, idler sprocket, and tensioners) and then decide if a chain job is even needed?

You can call me names all you want, it doesn't change the fact that you are ready to do a job that you're certainly not capable of, thus costing you more time and money than you can afford, when you can do a much easier, lighter job that you might actually be able to handle by yourself and save that time and money that you really can't afford to spend in the first place.

im not a dumb ass in cars yea it was a stupid question to ask, but i just wanted to know because i usually dont work on 240 because i just recently bought my 240 about 2 months ago, and i love them now, i usually work on honda which is totally different because of the rwd and fwd cars but i might not know more than you about 240's but im no dumb ass when it comes to putting one together