Cadmium rotor coating longevity
I just now got around to cleaning the parts for a spare 13B I have in my shed (Series 4 NA). Bought it disassembled from a guy who was parting out a car he purchased, unknown if it was the original engine but the shell was rough and had a fair bit of mileage.
Cleaned it up, and this engine is definitely not original. The apex seals are worn, and the irons have slight wear in the usual places, but the rotors and housings are basically brand new. While there was carbon on the rotors it was just a skim coating, and I was able to remove almost all of it with just a toothbrush and degreaser. The engine was dirtier on the outside than on the inside. The rotors are so new that they still have the original cadmium coating on them, and appear almost completely unworn. I was curious to see if anyone had experience as to how long that coating lasts, as that would tell me roughly what the mileage is. Regardless of mileage I lucked out here, but it would be good to know. To give an idea of how they look, the coating is only slightly duller and rougher than the coating on Aaroncake's RX-5 rotors in his YouTube series (episode 4). |
First of all I want to say Cadmium is really toxic heavy metal similar to lead (but isn't lead - I hope that makes sense). The coating is applied by electroplating which is a micro version of welding and will last forever if left to sit there.
Hope that helps. |
Originally Posted by brucebrucehitit
(Post 12282189)
The coating is applied by electroplating which is a micro version of welding and will last forever if left to sit there.
Hope that helps. |
it gets covered in carbon as soon as you start the engine, so it lasts forever.
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