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View Full Version : Separating Manifold From Midpipe?


T325i
03-26-2009, 07:27 PM
i'm taking off the exhaust for a new tranny install.

i'm having REAL trouble removing the exhaust. the nuts that hold the manifold and the midpipe came off but one. i COMPLETLY stripped the last one and i bought a dremel. i'm trying to cut it up but its not working

but i cant get the manifold studs pulled away from the midpipe. are there studs on the manifold end? or is it an actual bolt that i just snapped the head off of? i'm FCKED and pissed i cant get the last bolt:mad
http://www.realoem.com/bmw/diagrams/b/w/4.png
oh wait.. so its a stud like that. i have no nut on the manifold side, it just screws in? do i have to back to out to get the midpipe off
http://www.realoem.com/bmw/diagrams/n/w/17.png
THAT whole thing needs to come off
file:///C:/Users/Taylor/AppData/Local/Temp/moz-screenshot.jpg
budget76
03-26-2009, 07:32 PM
dremel was the wrong choice. Get yourself a real 4.5" grinder with a cutoff wheel. They are studs, so you'll have to get lucky finding a bolt to bolt it back up. It was a PITA on my end as well ;)
Bluebimma
03-26-2009, 07:36 PM
OBDI studs are very difficult to get out and you should have really tried to preserve the studs and threads themselves. OBDII headers have press fit studs that can eaily be pounded out and restudded or new bolts and nuts can be installed. Your best bet is to pull the headers off the engine, with the midpipe attached, and workyour magic from there. New bolts or studs are the remedy for sure.
T325i
03-26-2009, 07:38 PM
dremel was the wrong choice. Get yourself a real 4.5" grinder with a cutoff wheel. They are studs, so you'll have to get lucky finding a bolt to bolt it back up. It was a PITA on my end as well ;)

great 60 bucks down the fcking drain.
i dont have enough room to fit the dremel really. and i dont know what angle i should cut it.


OBDI studs are very difficult to get out and you should have really tried to preserve the studs and threads themselves. OBDII headers have press fit studs that can eaily be pounded out and restudded or new bolts and nuts can be installed. Your best bet is to pull the headers off the engine, with the midpipe attached, and workyour magic from there. New bolts or studs are the remedy for sure.

my remedy was going to be.

1. try somehow to get the last bolt out.
2. pull the exhaust down
3. put the tranny and all that shit in
4. buy Ebay headers and put them in
5. bring the car with an open manifold to an exhaust shopw and have the re-weld everything

hah

thanks for the awsome fast responses
Bluebimma
03-26-2009, 07:53 PM
Whoa whoa whoa, dont drive that car with no headers, youll destroy your valves.

Just drop the exhaust, by the headers, and then remove the midpipes from it. If you want ebay headers, more power to you, but dont half-ass this or make too much work for yourself, ive been in this same situation with another ti swappers build.
T325i
03-26-2009, 08:02 PM
whats the best way to pull down the midpipes? back the studs out?

and any other suggestions for the shitty stuck bolt
Bluebimma
03-26-2009, 08:03 PM
If you have the nuts all removed, hammer, pry, and wiggle them off, otherwise, you need to remove or loosen the headers anyways to take the pressure off the joined area.
budget76
03-26-2009, 08:09 PM
You''ll find uses for the dremel, don't worry. It WOULD work for your situation if you can get it in there, but it'll take forever. Then again, I forgot how little room there is down there, and a 4.5" grinder probably wouldn't fit. GL, don't really have any more suggestions than you've already got.
T325i
03-26-2009, 08:10 PM
ohhh i thought the studs had to be screwed out.
Bluebimma
03-26-2009, 08:11 PM
They relly cant be screwed out once in and have rust on them.
T325i
03-26-2009, 08:13 PM
ok. nut out. bang bang with rubber mallet. pull. drop.

whatd you think on the Ebay headers? still not quite sure
Bluebimma
03-26-2009, 08:16 PM
You cant bang them out man, theyre like permanantely screwed in there.
T325i
03-26-2009, 08:22 PM
no i meant the midpipe.
Bluebimma
03-26-2009, 08:25 PM
Ah, yes, you should be able to do that.

Ebay headers, heard they were good.
T325i
03-26-2009, 08:36 PM
alrighty. this was a very useful thread for me:buttrock. thank you so much for your awsome help bluebimma:clap
Bluebimma
03-26-2009, 08:45 PM
You cant thank me until you are sucessful. LOL
T325i
03-26-2009, 09:14 PM
hah im just going to hack away tmrw and the bolt with my new dremel. hah i love new tools
T325i
03-28-2009, 09:29 PM
http://i42.tinypic.com/nlbpko.jpg

http://i39.tinypic.com/qq1z0g.jpg

http://i42.tinypic.com/9bhm2w.jpg

:):):):):):):):):):):):):)
Bluebimma
03-29-2009, 06:58 AM
Wooot!
atlantisvip
03-29-2009, 08:15 AM
Gotta love BlueBimma :buttrock
T325i
03-29-2009, 10:31 AM
hell ya. with that stripped stud it kept one half of the manifold on (you can see it in pic 2) which made it a COMPLETE WHORE to pull out from underneath.

lets just say it came out with 3 jacks and my car being about 10 ft in the air. ha
catalyst.
03-29-2009, 11:45 AM
wow so you just couldnt get the studs out.. how hard was it to pull the headers??
T325i
03-29-2009, 11:49 AM
to pull them off the block?? EASY. the studs usually come off with the bolts. if all the studs are off the manifold just pretty much falls off. if you leave studs behind its a bit tougher.

to pull them from under the car still attached? rough. like i said. the bolts came off the manifold like cake too.

PB BLASTER is GODly