Coupenut

Question, where are the sunroof drain outlets on a 1992 SC400. The drains are clogged, and I've run weed whacker line from the sunroof down but ran into an obstruction. I'd like to run the line from the outlets up but I don't know where the outlets are. It's my friends car ,and I'm not very familiar with the this Lexus model.

Thanks in advance

xxtoobsxx

iTrader: (4)

they run into the 4 pillars. You need to remove headliner to access the tubes.

Coupenut

Thanks for the response. I'm trying to find out where they actually exit the body to drain.

originaljo

Need same info. Where is the outlet for the rear driver's side moonroof drain tube?

dean s

can you access where the hose comes down into your trunk behind the liner? should give you a good idea of where it exits from there.

joewitafro

I believe its directly infront of the rear tires. If you open your trunk and go down along the sides you will see the 3/8" or so sized drain tube on each side going through/into air baffles that vent the trunk/cabin pressure.

originaljo

Thanks. I pulled the skirts in the trunk and found it. However, I can't get a stiff wire to go all the way from top to bottom either working from the top or bottom. Do these tubes connect to a T in the pillar where other drain tubes connect also? Didn't want to be too forceful and mess up something.

t2d2

iTrader: (8)

One-piece tube from sunroof corners down to outlets. Use a long zip tie or something, stiff enough to not just curl up on itself, flexible enough to follow the contours.

originaljo

Zip tie not stiff enough. Finally used a small diameter drain auger which worked. Thanks for the help.

Bimmerbill

Just another suggestion is buying a length of small cable (make sure it is long enough to go all the way through) wrap the ends with electrical tape so the cable will not damage the inside of your drain tubes. This has worked for me for thirty years. Good luck.
Bill

t2d2

iTrader: (8)

The point was to get one stiff enough. They make 'em as thick as the drain's inner diameter, and the long ones tend toward that thickness. They're more than stiff enough.

LeX2K

Diagram only shows 2 drain hoses, which I find odd
https://www.japan-parts.eu/lexus/us/...s/2?pnn=63218A

Anyway proper way to clear them out is get a tube that fits into the factory tube and use compressed air.

Bimmerbill

The problem with compressed air is you take a chance on dislodging the drain tube and then you are up that famous creek.
Bill

KahnBB6

iTrader: (5)

^^ This. It's better to use some plastic/nylon weed whacker line to *gently* poke through for any clearing out of the drain tubes. No risk of dislodging the lines that way.

Bimmerbill

Craig
The reason I recommend the small cable is it has more substance (stiffness even though it is very flexible) and if you have a drain tube that is really clogged it will do a much better job of clearing the drain tube than the plastic from a Weed Wacker. Just speaking from my experience.
Bill