305ls400

i have a 1992 lexus ls400 now my sunroof is leaking i check and there is no rust no damage or anything on the sunroof system but is leaking can someone help me i try to look for the sunroof seal online but was not able to find it and the dealer has them for over 275

CUMan

Where is it leaking? Front or back?

Sunroof leaks are not usually caused by a bad seal. The usual culprit is a blocked drainage tube. The sunroof assembly has four drain holes that drain water from the assembly to the bottom of the car. The front two drains are easily accessible. If you open the sunroof and look at each front corner of the assembly beneath the roof, you will see two small holes. They are about pencil eraser size or maybe a bit smaller. Get some plastic weedeater line and run it down these holes. This should open up the drain. Check by pouring a bit of water in these holes and look behind the front wheels to see if it runs out.

If the leak is in the rear, it is not so easy. The rear drainage holes are not accessible from the top (or at least I was never able to even see them). The drain tubes, however, run through the trunk. You will have to remove the trunk liner to see them. Running your weedeater line up through these tubes should remove the blockage.

Another alternative, if you have an air compressor, is to blow out the drain lines. You would need a small fitting for the compressor air outlet that would fit tightly inside the drain holes. Be careful with this. You don't want to blow apart any of the drain tubing assembly, so keep the pressure setting fairly low.