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On the 4.6 is it possible to replace the cats as a unit without dropping the trans crossmember?


MyExplorer03v8Lim

Active Member
Joined
June 20, 2016
Messages
257
Reaction score
14
Year, Model & Trim Level
2003 Explorer 4.6L
The heads were snapped off my crossmember bolts, so just yesterday I had the crossmember welded to the frame.

ON THE WAY HOME from my welder, the P0420 code came on for the fourth time in as many weeks.

I have been avoiding this cat replacement job until I can figure out exactly what's fouling them (suspect internal intake coolant leak), but since the code keeps coming back, the project is now priority 1.

I don't feel like having the welds removed so soon after doing them, so I'm wondering if it's even possible to get the cats out without dropping the crossmember. Am I crazy?
 




hlg99

Elite Explorer
Joined
May 14, 2010
Messages
187
Reaction score
12
City, State
Boston
Year, Model & Trim Level
08 Mounty Premier
Ouch, not sure about the '04 but the chiltons for my '08 says to drop the crossmember.
 








Drewmcg

Elite Explorer
Joined
August 27, 2015
Messages
727
Reaction score
88
Location
Michigan
City, State
Ann Arbor, MI
Year, Model & Trim Level
2010 XLT 4WD
2002 XLS 2WD
I'm interested in the answer to the O.P.'s question for the 4.0 SOHC engine (I doubt there's a difference), in both 2wd and 4x4 configurations.
 




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