Difficulty on removing cat downpipes?
#1
Difficulty on removing cat downpipes?
I'm looking to replace the Bank 1 passenger cat downpipe specifically. The P0420 code is constantly getting stored; at this point I'm moving past O2 sensors, as it makes no sense that the same code is stored time and time again if the O2 sensor is bad, and I'm going to replace the cat for safe measure, assuming the O2 sensors are doing their job and the bank 1 cat is in fact bad. How difficult is it to remove/replace? I can't find any DIY on it, and fingers crossed I don't have to dig deep into the engine bay to reach some odd bolt or something to that extent.
Last edited by MisplacedPriorities; 07-27-2020 at 02:47 PM.
#3
#5
I've checked the diagrams of the S and the R...the downpipes are not that much different, other than the cat rating maybe, and whether it's AWD. Either way, mine is barely 13k, so here's to hoping I don't run into seized bolts (I've seen it before with older cars, and yes it sucks). Also fingers crossed this will solve the P0420 code I'm still getting.
EDIT: Just to be safe, I ordered the bolts too. I didn't see any exhaust flange gasket being required though...
EDIT: Just to be safe, I ordered the bolts too. I didn't see any exhaust flange gasket being required though...
Last edited by MisplacedPriorities; 07-28-2020 at 01:37 AM.
#6
I've checked the diagrams of the S and the R...the downpipes are not that much different, other than the cat rating maybe, and whether it's AWD. Either way, mine is barely 13k, so here's to hoping I don't run into seized bolts (I've seen it before with older cars, and yes it sucks). Also fingers crossed this will solve the P0420 code I'm still getting.
EDIT: Just to be safe, I ordered the bolts too. I didn't see any exhaust flange gasket being required though...
EDIT: Just to be safe, I ordered the bolts too. I didn't see any exhaust flange gasket being required though...
#7
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#8
#9
#10
You need NEW studs and bolts (2 of each) the flange comes with the down pipe. You also should buy a new clamp to secure the downpipe to centre section. Re-using the existing one might not seal properly. Have a grinder with you because the OEM centre section clamps are Tack welded on. Good luck! You need stubby short key to reach the top bolt or a crow foot key in half inch so then you can get a half inch extension on there about 14 inch long with a breaker bar. That's my take! IF you dont have those tools dont waste your time. The dealer will charge max 2 hours to get that done! Is $250 worth the headach of DIY?
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MisplacedPriorities (07-28-2020)
#11
Anyway, I'm going to try replacing the downstream O2 sensor first. Seems like sourcing a new OEM cat isn't all that easy.
#12
#13
I'm looking to replace the Bank 1 passenger cat downpipe specifically. The P0420 code is constantly getting stored; at this point I'm moving past O2 sensors, as it makes no sense that the same code is stored time and time again if the O2 sensor is bad, and I'm going to replace the cat for safe measure, assuming the O2 sensors are doing their job and the bank 1 cat is in fact bad. How difficult is it to remove/replace? I can't find any DIY on it, and fingers crossed I don't have to dig deep into the engine bay to reach some odd bolt or something to that extent.
Has any group offered replacement pipes to remove the Cats. Need a replacement electrical fitting to trick the computer.
Used on Harleys when Std pipes are removed.
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