How long to install catted downpipes?

Citizen Z · 03-19-2009, 05:38 AM

I have catted downpipes arriving this week and need to know how much time I need to budget for the install. I will have a lift avialable with every tool conceivable at my disposal since I can use the auto crafts shop on post (Army). I just need to know how long it'll take. I'm very mechanically inclined.

Citizen Z · 03-19-2009, 09:38 AM

Nobody knows? Nobody has EVER installed catted downpipes?

My135 · 03-19-2009, 11:03 AM

Which down pipes that you have, Cp-e, RR or AR?

Citizen Z · 03-19-2009, 11:06 AM

Quote:

Originally Posted by My135

Which down pipes that you have, Cp-e, RR or AR?

cPe catted with cast bellmouths. The install process should be identical for nearly all the dowpipes, the only difference whether or not you have to fuss with the o2 sims.

KeithLM · 03-19-2009, 11:58 AM

My BMW shop charges it as a 4.5 hour job. It can be tricky the first few times I'm told. You have to kind of angle them in their brackets just so. Make sure you keep track of which O2 sensors go where and keep count of all the bolts and screws.

imdanomite · 03-19-2009, 02:23 PM

^^^i've done a couple, it's just a little tricky moving the pipes around. the v-band clamps can be a little annoying.

support the engine with a jack stand, unbolt the cat from the exhaust (you don't have to remove the exhaust, just let them hang). mark all the o2 sensors/connectors. there is a bracket holding the lower portion of the cats (connected to the trans bell housing). remove o2 sensors, loosen up the v-band clamps all the way, remove right side motor mount bracket (entire assembly). rest is just twisting and pulling till they fall out.

TT1351 · 03-19-2009, 02:24 PM

Not that long if all goes well. The problem I had was getting the clamps back on the the new down pipes and exhaust manifolds, pay close attention to how they were situated before removal. The big issue is very little room to work in up there.
Fran

03-19-2009, 05:38 AM	#1
Citizen Z Alpine Master 109 Rep 1,310 Posts Drives: '08 135i AW Sport Join Date: May 2008 Location: Kansas iTrader: (1)	How long to install catted downpipes? I have catted downpipes arriving this week and need to know how much time I need to budget for the install. I will have a lift avialable with every tool conceivable at my disposal since I can use the auto crafts shop on post (Army). I just need to know how long it'll take. I'm very mechanically inclined. __________________ Alpine White with Taupe Leather 135i, Sports Package, Heated Seats, Comfort Access, iPod Adapter Fastness: http://www.1addicts.com/forums/showthread.php?t=252727
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03-19-2009, 09:38 AM	#2
Citizen Z Alpine Master 109 Rep 1,310 Posts Drives: '08 135i AW Sport Join Date: May 2008 Location: Kansas iTrader: (1)	Nobody knows? Nobody has EVER installed catted downpipes? __________________ Alpine White with Taupe Leather 135i, Sports Package, Heated Seats, Comfort Access, iPod Adapter Fastness: http://www.1addicts.com/forums/showthread.php?t=252727
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03-19-2009, 11:03 AM	#3
My135 Lieutenant Colonel 85 Rep 1,609 Posts Drives: Join Date: Mar 2008 iTrader: (0)	Which down pipes that you have, Cp-e, RR or AR? __________________ 7/08 135 Coupe, Crimson Red, 6 SP, Sport, Taupe Lette/Aluminum. Performance Mods: JB4 on Map 5, BMS DP Fix V3, Injen polished intake, AR Catless DP, Maddad resonated mid-pipes, aFe exhaust polished tips, ST Suspension Coil Over and Hotchkis front sway bar. Others: BMS OCC, BT Scanner, Mud Flap. Next Mods: AA Front Strut Brace.
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03-19-2009, 11:58 AM	#5
KeithLM Proud 1er 24 Rep 699 Posts Drives: Crimson/Coral 135i Join Date: Apr 2008 Location: Wylie, TX iTrader: (0)	My BMW shop charges it as a 4.5 hour job. It can be tricky the first few times I'm told. You have to kind of angle them in their brackets just so. Make sure you keep track of which O2 sensors go where and keep count of all the bolts and screws.
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03-19-2009, 02:23 PM	#6
imdanomite likes boobies ( o )( o ) 13 Rep 275 Posts Drives: 2009 BMW 135i Join Date: Jan 2009 Location: MD iTrader: (0)	^^^i've done a couple, it's just a little tricky moving the pipes around. the v-band clamps can be a little annoying. support the engine with a jack stand, unbolt the cat from the exhaust (you don't have to remove the exhaust, just let them hang). mark all the o2 sensors/connectors. there is a bracket holding the lower portion of the cats (connected to the trans bell housing). remove o2 sensors, loosen up the v-band clamps all the way, remove right side motor mount bracket (entire assembly). rest is just twisting and pulling till they fall out.
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03-19-2009, 02:24 PM	#7
TT1351 Captain 508 Rep 929 Posts Drives: 135, GTS, E30 M3+ Join Date: Dec 2008 Location: Massachusetts iTrader: (2)	Not that long if all goes well. The problem I had was getting the clamps back on the the new down pipes and exhaust manifolds, pay close attention to how they were situated before removal. The big issue is very little room to work in up there. Fran
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