1988 d21 bad noise timing chain??

[bbar]

Hi,

Have a 1988 d21 2.4 175,000 miles. Has slowly developed a bad scraping/clattering noise which sounds like loose timing chain. Have been told there are guides that can be checked/replaced that you can do without tearing the engine apart and may solve the problem. Please give me info on these guides , where they are located, how to take them out to check and whether this may be the problem. Thank you

[Rev_D21]

Everything is located behind the front timing cover. The KA and NAPS-Z have similar step involved in replacing the chain and its guides. We have lot of info floating around the forum on this topic.

[TeslaTrooper]

I do not know if this is relevant or not, but I just got my truck for cheap because someone put a cheap a** timing chain set on my 88 Nissan that allowed the timing to skip and ruin the head. (it cut grooves between the cylinders backfiring as it was drove home)

I got another head used and a shop showed me the tensioner didn't even have a locking mechanism, just free floating. No wonder it skipped!

My only advice is to get good quality parts on the set and tensioner as it DOES make a difference.