Oh ya, on my 90 s13, to replace timing change you need to:
1.remove oil pan.2. remove valve cover3. remove mechanical fan.4. remove steering drive belt.5. remove a/c compressor belt.6. remove alternator belt7. remove crankshaft pulley8. remove oil pump9. remove ignition distributor10. remove timing chain and sprocket, including tensioner and guides.
Althought is not too difficult, is not fun Since is a tedious process, i replaced every belt, tensioner and guides, including oil pump This should last me another 5 years
