Need to know setting of the timing chain 1998 hyundai elantra 1.8 ltr engine

SOURCE: noise under hood like rattling sound

Try checking the heat shields on the exhaust pipe up front under the car. Alot of times they will loosen up, and begin to rattle. You can ither remove them, or try to clamp them.
Hope this helps!

SOURCE: timing chain mark diagram for a 94 grand am????

Haynes lists the entire procedure for setting the position of the cams etc. Positioning of these is critical...If off by even a slight amount the valves WILL strike the pistons and destroy the engine. DO NOT use any parts made by SA Gear...They have no quality control and will deny any claim made against them. Make sure that the chain guides are in good condition and that the chain tensioner is operating properly.

SOURCE: Replacement of timing belt for 2004 Hyundai Elantra

is it necessary to replace the water pump at the time of replacing the timing belt on a 2004 Hyundaii Sonata?

SOURCE: Yellow Engine Light Comes on and car is very

If the light was flashing when it came on, then it means your engine is misfiring.

A solid light can mean anything from a loose/faulty gas cap to a transmission issue.

This light comes on when the computer detects a fault of some sort in its diagnostic tests. If it keeps detecting this issue, the light will remain on. If the light turns off, then it has detected that the issue may no longer be present.

In order to find out what the exact reason was for your light, You need to have your car computer scanned to retrieve the code that the computer would have stored when the light triggered. Most garages will do this free of charge. The code will tell you what may have caused the light to initially turn on.

SOURCE: 1998 Chrysler Town Country 3.8L Does it Have Timing Belt Or Chain

your engine does have a timing chain, these are very durable, there is no set maintenence interval for them. you can tell how much chain slack you have by gabbing your crankshaft pulley with both hands and rotating it back and forth to feel the chain tightening, it should be a minimul amount of rotation. you should get well over 200k mi. of service without worry. i hope this answers your questions, or at least sets your mind at ease.