Lexus IS250 IS220d GSE20 ALE20 4GR-FSE EXHAUST

EXHAUST PIPE - INSTALLATION

1. INSTALL TAIL EXHAUST PIPE BAFFLE SUB-ASSEMBLY

Align the baffle with the protruding part of the tail exhaust pipe assembly as shown in the illustration.

Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Using a plastic hammer, uniformly tap the exhaust pipe baffle sub-assemblies onto the tail exhaust pipe assembly.

2. INSTALL EXHAUST PIPE DAMPER
Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Install the exhaust pipe damper with the 2 bolts.

  • Torque:
  • 19 N*m{ 194 kgf*cm, 14 ft.*lbf}
3. INSTALL TAIL EXHAUST PIPE ASSEMBLY
Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Install the tail exhaust pipe assembly with the 6 exhaust pipe supports.

4. INSTALL FRONT EXHAUST PIPE ASSEMBLY
Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Using a vernier caliper, measure the free length of the compression springs.

  • Minimum length:
  • 38.5 mm (1.516 in.)

If the free length is less than the minimum, replace the compression spring.


Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Install a new gasket to the rear end of the front exhaust pipe.

  • NOTICE:
Be careful with the installation direction of the gasket.
Do not reuse the gasket.
To ensure a proper seal, do not use the tail exhaust pipe to force the gasket onto the front exhaust pipe.
  • HINT:
  • Using a plastic hammer, uniformly strike the gasket so that the gasket and front exhaust pipe are properly fit.

Install 3 new gaskets and front exhaust pipe assembly.

  • CAUTION:
  • Do not reuse the gaskets.
Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Install the 2 bolts and 2 compression springs.

  • Torque:
  • 43 N*m{ 438 kgf*cm, 32 ft.*lbf}
Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Install 4 new nuts and 4 bolts.

  • Torque:
  • 62 N*m{ 632 kgf*cm, 46 ft.*lbf}
  • NOTICE:
  • Do not reuse the nuts.
5. INSTALL HEATED OXYGEN SENSOR
Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Before installing the heated oxygen sensors, twist the sensor wires counterclockwise 4 turns.

Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Using the SST, install the heated oxygen sensors to the front exhaust pipe.

  • SST
  • 09224-00010
  • Torque:
  • 44 N*m{ 449 kgf*cm, 33 ft.*lbf}

After installing the sensors, check that the sensor wires are not twisted.


If the sensor wires are twisted, reinstall them.

Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Install the grommets of the heated oxygen sensors.

6. INSTALL FRONT CENTER FLOOR BRACE
Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Install the front center floor brace with the 4 bolts.

  • Torque:
  • 7.4 N*m{ 75 kgf*cm, 65 in.*lbf}
7. INSTALL REAR NO. 1 FLOOR PANEL BRACE
Exhaust Pipe - Installation. 4GR-FSE EXHAUST. Lexus IS250 IS220d GSE20 ALE20

Install the rear No. 1 floor panel brace with the 4 bolts.

  • Torque:
  • 19 N*m{ 194 kgf*cm, 14 ft.*lbf}
8. CHECK FOR EXHAUST GAS LEAKS

If exhaust gas is leaking, tighten the related parts to stop the leak. Replace damaged parts as necessary.


LEXUS IS250, IS220d / GSE20 ALE20