odd problem

[ka9mgd]

I have a 96 Park Avenue with a firewall that is disintegrating from power steering fluid being thrown on it from a pump shaft seal leak. I have replaced the shaft seal. Now what can I repair the firewall with that has mostly broken and fallen off behind the power steering pump? I was thinking about using undercoating sprayed on the firewall unless someone has a better idea.

[brcidd]

If you are referring to the rubber/plastic HVAC box insulator- (as to what is deteriating)- they all do it- regardless of fluid spraying on it. They crumble apart- especially if you have to get in there to work on anything- there should be metal underneath it-- as a matter of fact, there were model years when the insulator was not used- just the metal was there- I usually just pull it off and consider it as good as a model year or two earlier...

I can't imagine a metal firewall rusting out with oil based fluid spraying on it....

[ka9mgd]

There is not any metal under it, just yellow insulation.

[Mastercarpentry]

Originally Posted by ka9mgd

There is not any metal under it, just yellow insulation.

My 94's simply melted from exhaust manifold heat on the bottom- the top seems good as new. No metal liner here either. Been like this 4+ years with no problems so I ain't gonna fix what ain't broke.
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Phil