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Audi Tts Quattro Engine Oil Separators

Audi Tts Quattro Engine oil separators

Engine oil separators for the Audi Tts Quattro start at $80.95. AutoBuffy stocks 4 options from brands including Standard Ignition. An engine oil separator (also called a catch can or PCV oil separator) removes oil mist from crankcase vapors before they re-enter the intake. When it fails, oil coats intake valves and intercooler passages, causing carbon buildup, rough idle, and reduced fuel economy.

Signs your Audi Tts Quattro needs a new engine oil separator

  • Oily residue or sludge buildup inside the intake manifold or intercooler piping
  • Rough or erratic idle that worsens after the engine reaches operating temperature
  • Increased oil consumption with no visible external leaks
  • White or blue-tinged smoke from the exhaust under light throttle or deceleration
  • Check engine light with codes related to crankcase ventilation or air-fuel mixture (lean condition)
  • Audible hissing or vacuum leak sound from the crankcase vent hose or separator housing

Which engine oil separator should you buy for your Audi Tts Quattro?

The main decision is whether to replace the OE-style separator with a direct-fit equivalent or upgrade to an aftermarket catch can that offers greater oil capture capacity. Direct-fit units snap into the factory location with no modification, while catch cans require hose routing and a mounting point. Consider how you use the Audi Tts Quattro — high-load or spirited driving produces more crankcase blowby and benefits most from higher-capacity separators.

OE Replacement (direct-fit)
Best for
Daily drivers who want a straightforward fix
What you get
Factory-equivalent performance, plug-and-play fitment, no modification required
Upgraded OE-Style Separator
Best for
Vehicles with high mileage or recurring oil buildup issues
What you get
Improved baffling over stock, same direct-fit mounting, better oil capture without added complexity
Aftermarket Catch Can (single-port)
Best for
Performance or high-load driving with moderate blowby
What you get
Larger reservoir, drain valve for easy servicing, significant reduction in intake oil deposits
Dual-Port Catch Can
Best for
Turbocharged or heavily modified engines with high blowby
What you get
Handles both PCV and breather sides simultaneously, maximum oil separation, requires custom hose routing

Engine oil separators brands we stock for your Audi Tts Quattro

Standard Ignition
4 options · from $80.95

Replacing the engine oil separator on a Audi Tts Quattro

Moderate⏱ 1–2 hoursSocket set and ratchetScrewdrivers (flathead and Phillips)Hose clamp pliers or slip-joint pliersTorque wrenchShop rags and a drain pan

Begin by relieving any crankcase pressure, then carefully disconnect the PCV hoses and any electrical connectors attached to the separator housing before unbolting it from its mounting location. Install the new unit in the reverse order, ensuring all hose connections are fully seated and clamps are snug to prevent vacuum leaks. After startup, check all connections for leaks and confirm the idle is stable before returning the Audi Tts Quattro to normal use.

Frequently asked questions

How much does it cost to replace engine oil separators on a Audi Tts Quattro?
Parts start at $80.95 for the Audi Tts Quattro. A direct-fit OE-style separator is the most affordable route and often a straightforward DIY job. Aftermarket catch cans sit higher on the price range. If you pay a shop, expect to add one to two hours of labor on top of the part cost.
What happens if I don't replace a failed engine oil separator on my Audi Tts Quattro?
A failed separator allows oily mist to coat intake valves and manifold surfaces continuously. Over time this causes heavy carbon deposits on intake valves, which restrict airflow, degrade combustion efficiency, and eventually require an expensive intake valve cleaning service. Turbo oil contamination and elevated emissions test failures are also likely outcomes.
How often should the engine oil separator be serviced on a Audi Tts Quattro?
OE-style separators are generally inspected every few oil change intervals and replaced when clogged or leaking. Aftermarket catch cans should be drained every few thousand miles or whenever the sight glass or reservoir shows significant oil accumulation. Driving conditions — especially short trips, cold climates, and high-load use — shorten service intervals.
Can a clogged engine oil separator cause a vacuum or boost leak on a Audi Tts Quattro?
Yes. A blocked separator restricts crankcase ventilation, causing excessive crankcase pressure. That pressure can push past gaskets and seals, creating oil leaks, or it can crack the separator housing and connected hoses, producing vacuum or boost leaks. Either condition disrupts the air-fuel ratio and will typically trigger a check engine light.
Is an aftermarket catch can better than the factory oil separator on a Audi Tts Quattro?
For stock daily drivers, a quality OE replacement is sufficient. For turbocharged engines, performance-oriented driving, or any Audi Tts Quattro that repeatedly accumulates oil in the intake, an aftermarket catch can captures significantly more oil mist per mile. The trade-off is periodic draining and slightly more complex installation compared to a direct-fit OE unit.
Will replacing the engine oil separator improve fuel economy or power on a Audi Tts Quattro?
Directly, no — a new separator restores normal crankcase ventilation rather than adding power. Indirectly, yes. Removing oil contamination from the intake restores proper airflow and combustion, which recovers any efficiency losses caused by carbon deposits or rich-running conditions tied to a failed or restricted separator. Improvement is most noticeable on high-mileage engines.

Shop engine oil separators by year for the Audi Tts Quattro

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