I have a 96 e230 and the expansion tank on top of the radiator exploded
causing damage to the bonnet of the car. I was stuck in traffic and noticed
that the temp was running a high (just below the red ). I was hoping to
pull off but it went before I had a chance.
Has anyone had this problem or any idea why the expansion tank would blow in
half. I'm more annoyed about the damage to the bonnet as it looks like I
will have to get a replacement.
Hmmm, If the other guys radiator cap theory is wrong, then I am afraid
you may have some head gasket issue?
Perhaps the head gasket is leaking in such a way the blowby if super
heating and pressurizing the coolant?
Sorry for the negative thinking, but it seems like a possibility?
I've seen this a few times. Mainly on the C class which uses the same
radiator configuration. MB UK have passed on some information. Apparently
it's something to do with a pocket of super heated water that expands
rapidly when it reaches the expansion tank. Thus causing the top of the rad
to explode. The coolant level is a contributory factor. If it's too low, it
leaves more room in the rad for steam pockets to form.
Sounds like some sort of super-heated air/vapor bubble being passed
through the system.
My follow-up question would be this ...
Has your vehicle had latelya cooling system flush?
If so, that could account for the issue.
It migh also be a design flaw. (Sorry 'bout that conclusion)
But it's just not something that happens to other vehicles.
Does this happen to all C/E or just a certain series? If so, which?
Has there been a related recall (whether govt. or voluntary)?
E320/97/now I'm scared. :(
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