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What did you do to your Fiesta ST today ?

M-Sport fan

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It says PCD 108 and mfg date of 2001. I know there are a handful of TE37s out in the wild with 4x108.
OK, thanks.

I was trying to read the fine print with my almost 70 year old eyes, and even with glasses, I could not see that.

He may have mentioned in a past post that he had a very rare set of 4x108 TE37s, but I was not sure.
 


Dialcaliper

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The milky stuff looks kind of like oil-water emulsion (oil blowby mixed with condensation from the incoming charge air that’s being cooled in the intercooler. Especially if you live somewhere humid.

The yellow color is a bit odd though - the only two things that come to mind are either dye in your oil, or a really weird possibility is if you’re using an aftermarket air filter, and also live or drive near one of those awful street trees that splooge yellow pollen everywhere (which tends towards the smaller particle size and a fraction of it will get through the filter). Pine, cedar, pepper tree,etc. There’s one of the latter in my neighborhood and the person that lives there parks a car under it that’s constantly covered in nasty fine bright yellow dust. If you live or work near trees like that, you might find some of the yellow crap in either your engine filter or cabin air filter, though road dust might cover up the color. If it actually is pollen, it’s not harmful to the engine like typical silica and dirt, other than clogging up the air filter.

Barring those two possibilities it could be anything with yellow dye that goes in the car, or possibly something that reacts with moisture and blowby and drops out with the condensate post-intercooler.
 


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FiestaSTdude

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The milky kind of like oil-water emulsion (oil blowby mixed with condensation from the incoming charge air that’s being cooled in the intercooler. Especially if you live somewhere humid.

The yellow color is a bit odd though - the only two things that come to mind are either dye in you oil, or a really weird possibility is if you’re using an aftermarket air filter, and also live or drive near one of those awful street trees that splooge yellow pollen everywhere (which tends towards the smaller particle size and a fraction of it will get through the filter). Pine, cedar, pepper tree,etc. There’s one of the latter in my neighborhood and the person that lives there parks a car under it that’s constantly covered in nasty fine bright yellow dust. If you live or work near trees like that, you might find some of the yellow crap in either your engine filter or cabin air filter, though road dust might over up the color. If it actually is pollen, it’s not harmful to the engine like typical silica and dirt, other than clogging up the air filter.

Barring those two possibilities it could be anything with yellow dye that goes in the car, or possibly something that reacts with moisture and blowby and drops out with the condensate post-intercooler.
Wow, thanks for the detailed answer. Yes, I do live in an area where the pollen is bad, there’s a couple weeks where my FiST turns yellow lol. That’s probably why I have the yellowish color in the blowby.
 


Dialcaliper

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Tree Sex - you see there are the birds and the bees…

Pollen tends to be very small particles that are among the things likely to make it through a normal air filter, especially an aftermarket one. It’s also one of the few things in that category that could be bright yellow.

The tiny size is why people with hay fever/seasonal allergies go on about “HEPA” filters that take out very fine particles.
 


FiestaSTdude

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Installed the Baja designs fog lights and a new crash bar with the pierce Motorsports tow point today. Unlike the crashbar, the fog lights were easy and the rally innovations kit allows them to work with the oem switch. Driving the 2 miles from my parents house to mine I can say that they are very bright, to the point where I could drive without my headlights on. They also have a nice wide angle which I plan to put to the test on the twisty mountain roads that I love to drive.
 


Intuit

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The blue vehicle turns yellow (pollen) here too, but I don't recall that getting past the stock air filter?
 


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OK, thanks.

I was trying to read the fine print with my almost 70 year old eyes, and even with glasses, I could not see that.

He may have mentioned in a past post that he had a very rare set of 4x108 TE37s, but I was not sure.
Not sure if I've fully mentioned it here but you're spot on as far as what they are. I'll be posting pictures as soon as I have time to ceramic coat these and have the tires installed.
 


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Tree Sex - you see there are the birds and the bees…

Pollen tends to be very small particles that are among the things likely to make it through a normal air filter, especially an aftermarket one. It’s also one of the few things in that category that could be bright yellow.

The tiny size is why people with hay fever/seasonal allergies go on about “HEPA” filters that take out very fine particles.
Sorry, I was suggesting it was Pollen, lol.
 


FiestaSTdude

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Replaced my fan shroud assembly. My fan was not working intermittently so I decided to replace it. Getting the fan out resulted in more bent radiator fins than I like😡 Also, lots of people say that you need to vacuum bleed the coolant system. I’ve successfully refilled it twice now without using a vacuum blender. I get the front of the car in the air which I believe helps keep air from getting trapped because it can escape via the radiator vent plug thingy. I refill the expansion tank until a steady stream of coolant is flowing out the vent plug, then cap it with the coolant still flowing. Then I idle the car with the heat running until it reaches operating temperature and is blasting heat. This method works for me since I don’t have a vacuum bleeder
 


dhminer

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Replaced my fan shroud assembly. My fan was not working intermittently so I decided to replace it. Getting the fan out resulted in more bent radiator fins than I like😡 Also, lots of people say that you need to vacuum bleed the coolant system. I’ve successfully refilled it twice now without using a vacuum blender. I get the front of the car in the air which I believe helps keep air from getting trapped because it can escape via the radiator vent plug thingy. I refill the expansion tank until a steady stream of coolant is flowing out the vent plug, then cap it with the coolant still flowing. Then I idle the car with the heat running until it reaches operating temperature and is blasting heat. This method works for me since I don’t have a vacuum bleeder
I use same method and have had no overheating problems but I also don’t track the car often at all
 




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