1991 Mercury Cougar LS, 3.8 4FACTORY OEM SERVICE PROCEDURE

Turbocharger 2.2L: Notes

NOTE: Turbocharger cannot be overhauled. Turbocharger is serviced by replacement ONLY.

Before removing turbocharger, follow these precautions:

  • Clean area surrounding turbocharger using a non-caustic cleaner.
  • After unit removal, cover all engine openings with clean cloth to prevent entry of foreign matter.
  • Ensure blades are not nicked or otherwise damaged. An imbalance condition could result and lead to severe damage.
  • If any internal engine component is replaced, change oil and filter, and flush turbocharger with clean oil.
  • Before installing turbocharger on engine, gently spin blades to ensure freedom of movement.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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