If the oil is leaking from the timing chain cover behind the Harmonic Balancer (main large double pulley the belts run on). After removing the belts you need to remove the Harmonic Balancer using a puller, not to damage it, and then replace the seal in the cover. Inspect the back side of the Harmonic Balancer. The seal only seals to the shoulder of the Harmonic Balancer not the back face. If the shoulder's surface is not smooth replace it or it will leak again. Apply some light grease on the seal and mating surface of the Harmonic Balancer and reinstall. Re-install the belts. If it is leaking around the edges of the cover the sealant may need replacing. Also check the condition of the sealant around the oil pan. Both would require removal/cleaning and re-sealing.
Specifically where is it leaking? At the gasket? Replace gasket.
replace leaking part and or the gasket where the leak is occuring. check all hoses to make shure its not leaking from the hose
You must replace the head gasket.
The Intake gasket is leaking, NOT THE HEAD GASKET. Replace the intake gasket
The housing gasket may be bad. Replace the gasket.
Replace the thermostat housing seal or gasket.
The 2002 maxima has a problem with the oil pan rusting out. Replace the oil pan and gasket and it should be good to go
Most stop leak additives do nothing but empty your wallet. Replace the gasket that is leaking.
thermostat gasket probably leaking. replace thermostat and gasket making sure that thermostat housing is flat.
yes if its leaking or if u replace the oil pan
you go to a Machanic.
Not necessarily, unless you think they are leaking.