timing chain guide & tensioner alternative???

[aquariustiger]

1989 nissan 240sx ..engine: KA24E

Does anybody know of a better & stronger timing chain guide & tensioner. Mine broke again after I replaced it 5 years ago. I haven't opened the valve cover yet to check; but the old symptom is heard once again. Almost every time I start the engine; I hear that RATTLING noise!

[nutinwrong]

If you keep breaking guides, you may have too much slack in your chain. The tensioner isn't always the problem. Your gears could be worn or your chain could be stretched. I have a dohc and I replaced everything but the gears b/c I'm a cheap *** and 15,000 miles later, I've got the rattle again.

[aquariustiger]

That's good to know I'll be sure to replace those as well.

hey the first time I replaced the chain; I noticed the front cover was pretty chewed up; does the front cover have anything to do with the integrity of the chain??? Also every oil change I've been adding about a half a cup of mystery oil to lightly clean the accumulation of gunk in the engine; would gunk be jamming the Timing Chain Tensioner; well I'll be checking on that.