Question about 1990 Mazda MX-5
I have a 2006 MX5 sport. The car has experienced water into the boot which was due to a blocked drain that is located just behind the driver bulkhead. When you release and secure the hood back you can see a small grill that the roof drains into on both sides of the roof bay. Firstly you can try to put warm water down, you can then see the water collecting before draining away just below the grill. If this doesn't work (as was my case) I firstly moved the plastic fittings gently apart and vacuumed out the area (ensure it is dry- don't electrocute yourself) then got a garden hose and found the drain hole that is easy to find (you'll need a small torch). Using the hose (without the valve on the end) and crimping it to vary the pressure I flushed out the debris that had collected in the drain pocket (looked like leaves and sludge, similar to the gutters). The drain comes out under the right and left underside of the car. All in all about 1 hrs work most of which was getting the hose and hoover out!
Hope this helps.
Posted on Jul 04, 2009
In the Mk 1 (dont know about later models) there are drains that run from just behind the seatbelt tower down to just behind the rear wheels. If these are blocked at the bottom the rainwater from your soft top will end up inside the chassis along the sills. Best answer is to jack it up, pop an axle stand underneath and take a rear wheel off. You will then be able to find the bottom end of the drain. In future you will be able to find it without taking the wheel off once you know where it is. Give the plastic tube a squeeze to loosen the dirt blocking it. You can also put a bit of curtain wire through the drain tupe from the top, but be gentle.
There are also drain holes under the sill, where you put the jack, which easily get blocked and the water thencan't get out of the sill. A paperclip is good at opening these up. These drain holes are very small!
Posted on Jul 13, 2009
I have a 2002 MX5 and recently started to get this problem. Apparently its caused by the ducts which should drain water away from your chasis getting blocked. I have been told there are rubber stoppers somewhere underneath the chasis which can be removed to allow the water to drain. I plan to have a look and try to sort my own car out this afternoon, so hopefully this will work for you as well..
Posted on Oct 09, 2008
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Posted on Jan 02, 2017
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