Date registered: Nov 2014
Vehicle: 2000 E 320 Wagon + 2002 ML 500 SUV
Location: Pineywoods Region of East Texas
Mentioned: 1 Post(s)
Quoted: 141 Post(s)
Thoughts on Cat fixes / deletion options....
A quick 'word to the wise':
I have a theory: Rear cats can get clogged sooner & then cause issues with fronts.
That's cause the rears are 'unmonitored', meaning no O2 sensors to give feedback if they clog.
My rears clogged, then Pass front breaks a weld, probably from overheating due to clogged rear.
Solution was 'delete rear Cats' $ 50 per side, and weld up / repair Pass front for $ 80.
Now, If you're in Calfornia or other emission inspection crazy state, a rear cat delete MAY not be allowed, but I'd sure check.
Here in Texas they don't care about that stuff, but we owners want efficient clean running engines.
My ML500 is now running way better with less backpressure....all my valve cover gasket seepage stopped cold.
Hope this helps some...
David in East Texas
Last edited by 2000 E 320 White Wagon; 06-27-2019 at 10:04 AM.