Jim Grant's Tech Tips
'89 Nissan Maxima, Sunroof Drains
'89 Nissan Maxima has a rear sunroof drain plugged somewhere and water
pools under the roof after a rain until it finally sloshes either down
on me or out the front drains. Do you know where the drain tubes exit
at the lower end so that I may try blowing them out from below?
Im not mistaken youll find the rear drain tubes for the sunroof
traveling down the rear most post of the roof, between the rear inner
fender well and quarter panel and exit right behind the rear wheels at
the bottom of the rear fenders. The most common problem we see is with
leaves and rubbish building up at each rear corner drain. A quick shot
of air with a blowgun up through the drains should clear away the blockage.
After you get things clear, take the time to clean the rubbish you blew
out of the drains from the rear pan of the sunroof or it will just plug
things up again.