500 SEC 1984 - Water leak into vehicle

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R TRIPPIER

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I recently bought an example of the above model, cheap !! Now I know why.

Water leaks into the vehicle from behind the dashborad down between the bulkhead and the sound proofing into both foot wells. I have removed the whole of the dashboard assembly and fitted a new heater matrix and replaced everything. But still the water trickles down, allbeit, more slowly. I checked the alluminium feed/supply pipes, they , appear to be in good conditionbut didn't pressure test them. The rubber pipes from/to the cooling system which clamp to the alluminium pipes are in good order, there is no water "squirting" from the joints, so it cannot be "following" the alluminium pipes into the pod.

In desparation I introduced an expensive cooling sealant, but this hasn't worked either.

The water only runs when the engine is on, water level in the header tank goes down, water does not enter the car when it rains.

Where did I go wrong, I know, don't buy a 500 SEC again !
 

mercmush

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500 SEC 1984

I'm sorry to hear that you have a leaky 84   500SEC but if it makes you feel any better so did I !!

My advice is to get rid of the car. But if you're stubborn you'll have to check/replace the sunroof rain channels, the fr & rear screen rubbers & the rubbers for those 4 lovely pillarless windows.

If you must have another W126 anything buy one that has been blatantly pampered & I mean in every single department. Good luck !
 
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