Change serpentine belt on 1990 eclipse - Eclipse Mitsubishi Cars & Trucks

check out the videos

https://www.google.com/search?q=2006+Mitsubishi+Eclipse+GS+How+to+install+serpentine+belt

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If your Eclipse has the serpentine belt set up, the problem of the belt failing may be due to a worn belt tensioner, or tensioner pulley or a worn idler pulley. If the tensioner arm fluctuates a great deal when the engine is running, it's probably worn out and it is not providing the approprate tension on the belt.

Below is a link with multiple diagrams from different angles showing the belt routing on your 2000 Eclipse. Best of luck and thank you for using Fixya!
Greg
2000 Mitsubishi Eclipse Serpentine Belt Routing

Follow this link to see a step by step video on how to replace the serpentine belt...

http://www.wonderhowto.com/how-to/video/how-to-inspect-and-replace-your-car-s-serpentine-belt-267229/

If the belt is still on, be sure to sketch out how it is routed so you'll have a diagram to replace it by. Many cars have that diagram under the hood by the radiator as well.

Here is a link to the belt routing which you will need...
http://www.gates.com/common/part_locator/view_diagram.cfm?id=S8001

If you need help on "how to" replace the serpentine belt, follow this link to a video which will guide you...
http://www.wonderhowto.com/how-to/video/how-to-inspect-and-replace-your-car-s-serpentine-belt-267229/

1990 Ford F Series Pickup 6-Cyl. 4.9 L
Automotive V-Ribbed Belt (Standard)
Serpentine; W/A.C.; W/Auto. Trans



Automotive V-Ribbed Belt (Standard)
Serpentine; W/A.C.; W/Man. Trans



Automotive V-Ribbed Belt (Standard)
Serpentine; W/O A.C



Is this engine is your model, I hope help you with this. Good luck.

You should be able to see the diagram for the serpentine belt when you open the hood.

left need to use a air tool most likely

Typical timing belt intervals are every 60k miles. It's a very involved service to do the whole job - timing belt, timing belt tensioner, serpentine or accessory belts, water pump, thermostat, spark plugs, all fluids, all filters, brake and suspension inspection, and tire rotation. On many cars it's recommended to change the oxygen sensors as well. Quite a bit of this can be done when you want, but the first five items are critical and should all be done. And regardless of whether your manufacturer says the coolant is "lifetime", replace it - don't reuse coolant. It's cheap and it's good practice to use new coolant.