Melted Cam gears pics - Not for the squeamish!
08-06-2005, 05:17 AM
#16
Andrew,
You got me curious. Let me know on the wear, OK?
I'll do some surfing and see if I can find a reference to a baked/powder coat application.
Still, as far as I know, all of that family of products are dry film lubricants meant to be used on metal to metal , usually high force applications where hydraulics/pneudraulics are involved or high shear/shock loads are involved -heavy equipment tow shackles and pins- to prevent wear on high dollar, hard to replace items. Also reduces sand/grit erosion on parts since unlike more common lubricants like grease dry film lube don't trap abrasives like sand/grit. I can't see any way it could be used as a hard face procedure like carburizing, austinizing, or, nitriding -case hardening-.
Times change and there might be something spiffy I need to be made aware of.
You got me curious. Let me know on the wear, OK?
I'll do some surfing and see if I can find a reference to a baked/powder coat application.
Still, as far as I know, all of that family of products are dry film lubricants meant to be used on metal to metal , usually high force applications where hydraulics/pneudraulics are involved or high shear/shock loads are involved -heavy equipment tow shackles and pins- to prevent wear on high dollar, hard to replace items. Also reduces sand/grit erosion on parts since unlike more common lubricants like grease dry film lube don't trap abrasives like sand/grit. I can't see any way it could be used as a hard face procedure like carburizing, austinizing, or, nitriding -case hardening-.
Times change and there might be something spiffy I need to be made aware of.
08-06-2005, 03:24 PM
#17
What the heck did they soak those things in? Are the gears aluminum? If so it looks as if they were placed in caustic soda. That stuff will eat aluminum. Any one who uses it should know that. If the gears are steel, I can't imagine what would do that other than some sort of acid. I would say that someone owes you some new gears.
08-06-2005, 04:02 PM
#18
928 Engine Re-Re-Rebuild Specialist
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As I understand the story, the gears are magnesium and the coater wasn't aware of it. The solution they were dipped in clearly reacted poorly with magnesium.
The gears that this happened to were already worn and unusable. Unless Andrew thinks otherwise, I'd say they were worthless to begin with.
The side-by-side picture of the re-coated and old gears is one that I took. I have re-coated gears on my car with about 1,500 miles. I'll be sure to report how they hold up.
The gears that this happened to were already worn and unusable. Unless Andrew thinks otherwise, I'd say they were worthless to begin with.
The side-by-side picture of the re-coated and old gears is one that I took. I have re-coated gears on my car with about 1,500 miles. I'll be sure to report how they hold up.
05-10-2010, 09:21 AM
#19
How are things holding up with the dry film coating? Anyone else have any luck with this that you can report on as well? If I remember correctly it was sprayed on with a paint gun, is that right?
05-10-2010, 09:45 AM
#20
Supercharged
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I don't know how it was applied, Lex in NY did the coating, but I think it's a similar process to powdercoating. I've got about 20k miles on mine and Big Dave has about 30k on his (I think) and so far, so good. Everything has held up fine.
05-10-2010, 12:35 PM
#21
Were these done in China ? They should have know what they were doing and if not sent a check with them things.
eBay them as Dali gears is a good bet.
