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Registered
Join Date: Sep 2003
Location: Doha, Qatar
Posts: 135
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911 undercarriage
Quick question ladies and gents...
My near pristine 71 911's undercarriage is 99% perfect. The other 2% has slight surface corrosion where where fingernail size undercoating has flaked off. My question is should I go through and touch it up with something like POR15 or should I just leave it original (knowing from the Navy days that surface corrosion actually slows the corrosion process)? My car is a garage queen and the underbody will never see a liquid H20 molecule again. Thanks. 1971 911T |
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09-16-2003, 06:51 PM
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Registered
Join Date: Nov 2001
Location: Los Angeles
Posts: 937
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A 71 has non-galvanized steel and rust spots should be treated.
Sometimes the old undercoating pulls away from the chassis and creates "pockets" where water/moisture sit against the steel. You won't see all the rust until the undercoating is broken off. Probably should be treated....POR15 is supposedly the trick stuff.
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Scott |
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09-16-2003, 09:56 PM
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Registered
Join Date: Jun 2003
Location: Chelmsford, MA
Posts: 872
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Yeah JSDSKI is right... if you see rust under there, there's probably a lot of it you don't see... And treating that one spot won't really help.
I got my car up on a lift and spent a number of very unpleasant days scraping the tar protection off the underside of the car, cleaning it, polishing it to a shine (to remove all the surface rust), zinc treating it adn then POR-15'ing it. I worry a lot less now 
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1968 911L 2004 Dodge Dakota SLT Plus |
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09-17-2003, 02:29 AM
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