Oil Fill Cap Severely Eroded

Bruce Amacker · May 12, 2006

Have you guys ever seen an oil fill cap on a 6.0 severely eroded? I have an '04 with one that looks like it has rusted through. I know it's plastic, but that's how it looks. Just wondering if anyone else has seen this and what causes it.

Thanks!

gasgasman · May 13, 2006

Seen it on all Fords lately.

Probably heat damage.

Hayapower · May 13, 2006

One of the other 'suspects' is that most times the oil cap is removed, it's placed flat side down on the battery.. Also, some try and pin the cap damage to caustic cleaners like Simple Green/Biodyne but doesn't seem to be the case, otherwise a lot of other plastics in the compartment would be at risk.. I dropped one into an uncut solution of Biodyne and even let it sit in the shop under direct summer sunlight..Still like new.. They look to rotting/pitting as if the surface was breaking down.. Maybe something to the battery theory and/or heat as a contribution to the affects..

Keith Browning · May 13, 2006

Here is the picture Bruce submitted.

Posted Image

I have seen a couple similar to this one over the years but not quite this bad. Typically, if I find a problem with the oil cap on a customers truck its laying on the radiator shroud or on the battery where the last tech left it. /forums/images/%%GRAEMLIN_URL%%/drinkingdude.gif I vote for poor quality plastic.

LARRY BRUDZYNSKI · May 13, 2006

I have seen it a couple of times, laying near the battery. I would assume that it must be from the battery. I have a few pairs of pants that look the same way(leaking batteries)

Keith Browning · August 5, 2006

We recently had an Excursion in with a really bad exhaust leak from the y-pipe which the customer let go for a long time. The oil fill cap looked just like the picture and some of the plastic conduit on the wiring was melted and brittle. Given that bit of evidence I might vote for heat as well.