Big Honkin' Air Filter - no concern as your air filter is stock. You do not mention when the KDP fix, new valve springs, and new injector work was done. If it is recent, it could be the cause of the high silicon numbers.
Also, closely inspect your intake plumbing from the air filter box to the turbo compressor intake for any holes or tears (especially any flexible components).
- John
I would be concerned enough about a high
silicon reading to track down air inlet leaks; maybe a badly fitting air filter, something wrong with the pipes that lead from the air inlet, through the intercooler to the inlet.
Does the air filter housing still have the cone-shaped air flow meter that screws in from the top? It's designed to show you when the OEM air filter is clogging with road yuck to the point that it needs to be replaced. From all that I have read from various places, and been told by service writers that would earn a parts commission if they told me different, I think it's best to go by that gauge for air filter condition. BTW, I use Fleetguard filters I buy from Geno's.
Also, some say that it's unwise to remove the air filter and knock it against the bumper or blow it out with air from the inside to remove some of the dust, then put it back on. That's because good-size embedded particles that fall out leave holes bigger than the filter media and dust sneaks in.
I don't know the answer to this one: Does the
Silicon oil analysis reading include
Silicones? From my chemistry days,
Silicon means mineral particles, such as quartz (silicon dioxide, as well as other dust containing more complex
silicate minerals that occur naturally in rocks, sand, clay and dirt.
Silicone is an organic long chain polymer that contains the element
silicon, but shares few properties of the
Silicon mineral.
Silicone is not to be confused with the mineral
silicon. If
silicone sealants get into the combustion chamber, they'll "ash" into a
silicon compound that's abrasive.
For those that want a good, short read on what Silicone is and isn't, this Wikipedia link
https://en.wikipedia.org/wiki/Silicone is pretty good. The similarity of terms has been driving people nuts for decades, especially when both are involved.