1337ssei and I hung out with a guy with a turbo Beetle, and he needed a tuneup and an oil change. Here'* the Beetle backing into the garage:
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1.8L engine!
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The NGK spark plugs, OE, have VW logos!
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Torx bits are needed for nearly every single bolt! Even the oil pan drain plug! Here is 1337ssei'* masterful removal of the ignition coils, which sit on top of the valve cover and go straight to the plugs.
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Here'* the oil pan drain plug:
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This is where the air comes in:
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Make a fist. That'* how big the turbocharger is. The air intake duct goes way behind the engine and by the firewall. Then, non-intercooled, it goes straight up here:
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Well, there you go. Now you have seen under the hood of a turbo Beetle. The guy uses synthetic oil, by the way.

I think I'd rather have this one...
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That'* a Jensen sliding vane supercharger on top...

Yes, I'd much rather work with that. That is very cool looking.