All engines
WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not use oil or grease-based lubricants on isolators as they cause deterioration of rubber.
NOTE:
The exhaust Y-pipe-dual catalytic converter is a 2-piece assembly. The RH and LH converters can be serviced separately as needed.
- With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING AND LIFTING article.
- If equipped, remove the skid plate.
- Disconnect the catalyst monitor sensors electrical connectors.
- Loosen the exhaust Y-pipe-dual catalytic converter-to-exhaust intermediate pipe coupling. Slide the coupling back onto the exhaust intermediate pipe.
- Loosen the RH catalytic converter-to-LH catalytic converter clamp.
- Remove the nuts on the LH catalytic converter-to-exhaust manifold joint.
- Remove the nuts on the RH catalytic converter-to-exhaust manifold joint.
NOTE:
Whenever the exhaust Y-pipe - dual catalytic converter-to-exhaust intermediate pipe coupling is loosened, a new exhaust Y-pipe - dual catalytic converter-to-exhaust intermediate pipe coupling must be installed.
NOTE:
4.6L and 5.4L shown, 4.2L similar.
NOTE:
4.6L and 5.4L shown, 4.2L similar.
- Remove the heat shield bolts from the transmission crossmember.
NOTE:
LH side shown, RH similar.
- Remove the 2 catalyst monitor sensors.
- Remove the exhaust Y-pipe-dual catalytic converter hanger bracket and isolator bolts.
- Remove the RH catalytic converter.
- Remove the LH catalytic converter.
NOTE:
A special tool is available for use in removing the catalyst monitor sensors. An open-end wrench can be used for ease of removal.
NOTE:
If necessary, lubricate the HO2S with penetrating and lock lubricant to assist in removal.