BMW 1989-1995 525i Service Manual page 219

EXHAUST SYSTEM
180-3
3
I
6 - ~
7- @ @
I
8
11
M8x55
M8
B 11185A
1. Exhaust manifolds
2. Gasket (2)
3. Front pipe with catalytic convertor
4. Oxygen sensor (2)
5. Rear pipe with muHlers
6. Gasket
7. Bracket (2)
8. Gasket ring (50 mm)
9. Rubber mounting ring
10. Bracket
11 . Bracket assembly
12. Bracket/clamp
Fig . 4. Exploded view of exhaust system on 1994 and later 5301 and 540; models with MOO engine.
EXHAUST SYSTEM REPLACEMENT
New fasteners , clamps, rubber mou nts, and gaskets shou ld
be used when replacing exhaust components. A liberal appli-
cation of penetrating oil to the exhaust system nuts and bolts
in advance may make removal easier.
WARNING-
• The exhaust sys tem and catalytic converter op-
erete at very high temperatures. Allow these
components to cool betore servicing . Wear pro-
tective clolhing to prevent burns. Do not use lIam-
mabIe chemicals near
a
hot catalytic converter.
• Old. corroded exhaust system components crum-
ble easily and olten have exposed sharp edges. To
avoid injury. wear eye protection and heavy gloves
when working with ota exhaust parts.
Exhaust system, removing and installing
This section covers removing the exhaus t system as a com -
plete unit. Once the complete syste m is removed from the car,
individual pipes and mufflers can be more easily replaced.
1. With exhaust system fully cold , raise and support car
for access to exhaust system.
WARNING -
Do nol work under
a
lilted car unless it is solidly
supported on jack stands designed lor that pur-
pose. Never work under
a
car that is supported
solety by
a
jack.
2. Disconnect oxygen sensor connector(s).
3. Loosen and remove bolts holding front exhaust pipes
to exhaust man ifolds.
EXHAUST SYSTEM REPLACEMENT