From: Ron Milliet <milliet_at_smrmc.com>
Date: Thu, 30 Apr 1998 08:50:33 -0500
Subject: <E30> Water leaks...PLEASE add to the FAQ
Catherine, Greg and others:
I know EXACTLY what causes the "soaked floorboard carpet phenomenon" and
how to fix it. This question has come several times recently and many
times over the year. I **think** it is common to E30s and should be put in
a FAQ. I spent HOURS and many gray hairs tracking down this DAMN problem.
I COMPLETELY removed the interior of my car including the carpet.
Problem Description: After a rain, the carpet in the rear floorboard gets
TOTALLY soaked...usually visible, standing water. Close inspection reveals
that the water is coming from UNDER the carpet and rising up to the top.
This is different then the...dripping down from the sunroof leak, taillight
lens gasket trunk leak, and the ever annoying under the dash from fresh air
Problem FIX (from my previous posts):
It was both passenger and driver floor boards. I wrestled this PITA
problem for about one year, before I finally resorted to tearing the car
apart. I finally pin pointed the rocker drains were not draining. They
had been crushed closed by something. The sunroof would drain into the
rocker and eventually fill up enough to spill over into the floor pan via
holes for the wiring harness. This is very easy to test (details for an
- Start with car on level ground and fill the forward sunroof tube
slowly with water, it should immediately start streaming out as
fast as you pour it in via the "fore" drain
- The rear sunroof tube does not drain into the rocker
- Next point the front of your car up a steep hill and again fill the
front tube, the water should stream out of the "aft" drain
My car had two drains per side. These were merely indentions in the
sheet metal seam. All 4 of my drains were crushed closed. I used
a screwdriver to open them and was greeted with a rush of water held
in the rocker.
BTW, My car took on water once more after this. It happened when
my car was parked with the front down a VERY steep hill. The
problem was the "fore" drain is located about 8 to 10 inches from the
end of the rocker. This allows water to pool up and spill over before
it reaches the drain. This phenomenon was immediately remedied
with a 1/4 drill bit!!
Hope this helps,
Project Manager, Administrative MIS
Southwest Mississippi Regional Medical Center
[ Help ]