So, I'm getting on the freeway....

J

johnnyx

Active member
Jul 15, 2004
28
0
Scottsdale, AZ
www.running-realtor.com
and within about 2 seconds my Disco goes from "sounds great" to "sounds like an ol beater Caddie with no muffler"....and what feels like less "go.". I pull off the next exit, leave it running, pop the hood, and find that the two bolts/screws/whatever that's supposed to hold my exhaust manifold to my pipe (passenger side) are gone. Totally disconnected...

I head over to LR on McDowell and they're closed...so I figure N. Scottsdale one is closed too. I stop at ACE hardware and pick up some nuts and bolts - gotta have something... (with no idea what the correct setup should be). So I've got it "half-assed" with a grade 8, 1/4" nut and bolt holding it together (more quietly) until I can get the correct replacement.... My goodness that was loud and embarassing...

Anyone know off-hand what the correct size bolt is? and pitch?

Thanks in advance...

'99 DII
 
J

johnnyx

Active member
Jul 15, 2004
28
0
Scottsdale, AZ
www.running-realtor.com
Yeah, I figured metric too, and bought the 1/4 because I knew it was smaller than the hole. It slid right in without any force. Basically I wanted to "clamp" it down until I can find the right ones...

Funny you mention the other side... I did try to remove one from the other side thinking it might be the same (looked like a nut either attached to a bolt or permanent stud), but that side has 3 bolts. I abruptly broke off the bolt on the driver side :mad: :eek: (with the nut attached) as I was removing it... and I can't tell if that side has permanent studs in it, or if it's just "seized" on there real good. Figure I won't F&^% with that side until I stop at the dealer and find out for sure what it needs... :( 2 out of 3 is better than zero or one out of 3.... :eek:
 
H

Hoot

Well-known member
Apr 19, 2004
234
0
52
Bloomfield twp, MI
Johnny,

both sides of your exhaust manifolds have 3 studs in them, connecting them to the down pipe. it is a very common for them to work themselves out. i dont know the pitch or thread count on them. when mine fell out i ordered OEM replacements . i have read on dweb that there are aftermrket studs made out of brass that are made as upgrades for BMW's and some folks on here said they fit. i hope that you did not break the stud off in the manifold, becuase if you want to replace it you are going to have to remove the manifold from the engine. BUt as long as you still have two good studs in that side you could probably just tighten them up and go with only 2.
 
C

cmondieyoung

Guest
I threw in a glasspack just to get the sound you're talking about. :)

Having an obnoxiously loud Disco is like showing up to the office in a zoot suit---faaantastic. :D
 
G

GregH

Well-known member
Apr 24, 2004
1,630
0
Hoot said:
Johnny,

both sides of your exhaust manifolds have 3 studs in them, connecting them to the down pipe. it is a very common for them to work themselves out. i dont know the pitch or thread count on them. when mine fell out i ordered OEM replacements . i have read on dweb that there are aftermrket studs made out of brass that are made as upgrades for BMW's and some folks on here said they fit. i hope that you did not break the stud off in the manifold, becuase if you want to replace it you are going to have to remove the manifold from the engine. BUt as long as you still have two good studs in that side you could probably just tighten them up and go with only 2.
Click to expand...

Not "aftermarket studs made out of brass" but rather copper nuts for BMW exhaust that are same size/pitch thread as LR downpipe to manifold studs.

Good luck-
 
D

Disco Mike

Guest
John make sure you use factory bolts made for exhaust use or you will have a problem, it has something to do with the alloy and the heating up and cooling off, they need to be able to flex with the temp change or they will break.
Mike J.
 
F

fergy

Guest
John,

I had the same problem, however it was not on the road but rather after a re-install of my y-pipe (after ****** service). I noticed that 1 stud was gone and the remaining 5 were pretty hard to get off. Even with a liberal amout of penetrating fluid I still snapped the nut of one of the reamaining studs.
I did however had 1 good nut that I was able to match up with replacement studs and nuts at my local ACE hdwr store. These studs were desiged for the exhaust system and except for a longer length, worked fine. Both the nut and studs are metric (I think an M8, but I may be wrong). As was stated earlier by another D-Weber, just take one of your good nuts (the one from the manifold stud and not the one in your pants) down to your local auto-store or hdwr store and match them up.
I was unable to find the "right" nut, you know the type with the enlarged shoulder or whatever you call it. I just improvised and used a washer until which time I can replace.

Good luck Fergy
 
J

johnnyx

Active member
Jul 15, 2004
28
0
Scottsdale, AZ
www.running-realtor.com
Anyone care to guess how much EACH of those nuts are?

Why don't I spare you the suspense.... SIX dollars and SEVENTY cents - EACH. :eek: Yep - nearly $28.00 for 4 nuts.... Basically...bend over...

Now I gotta wait for everything to cool off and head out to the garage. :)
 
K

Kyle

Guest
28 bucks and its still not really fixed. The stock LR stuff is grossly undersized.. Whenever I have to deal with them anymore I open the holes up and put bigger studs in. Never in my life have I seen exhaust studs wring off like these do.

Kyle
 
K

Kyle

Guest
Curse at it alot , it helps...... And remove any large hammers from the general area , you might be tempted to beat the shit out of it....

Kyle
 
S

Sergei

Guest
Kyle, would you happen to have any trick in yer sleeve on how to get those bloody studs out, apart for breaking and drilling huge holes? :)

One of mine snapped at the top (overwise i'd just drill it out) and i am very tempted to just drill out bigger holes and stick there some serious bolts and nuts instead of that whimpy brass stuff.. But i spent money to get stock replacement ones (got 2 kits with gaskets, studs and nuts) so i like to use "proper and gentle" procedure, if possible :)
 
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