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The intake of the E46 after the MAF is composed from 2 rubber boots.
Environmental conditions and engine heat usually create small cracks
on the boot, specially on the inner one which secures on the intake
manifold. A cracked boot can create a variety of problems such as
poor performance, erratic idle, stalling, whistling noise under
acceleration. Many of the problems are because more air is actually
getting in the engine than the amount measured by the MAF. People
may replace a perfectly working MAF (which costs $$$) only to find
out that it was not the culprit.
Parts Required (taken from
realoem.com):
| No.
|
Description
|
Supplement
|
Qty
|
From
|
Up To |
Part
Number |
Price
|
Notes |
| 01 |
HOT-FILM
AIR MASS METER |
|
1 |
|
|
13621432356 |
$367.16 |
|
| 02 |
HOSE CLAMP |
L83-90 |
1 |
|
|
07129952133 |
|
|
| 03 |
RUBBER BOOT |
|
1 |
|
|
13541705209 |
$15.62 |
|
| 04 |
HOSE CLAMP |
L77-84 |
3 |
|
|
07129952131 |
|
|
| 05 |
RUBBER BOOT |
|
1 |
|
04/2003 |
13541437191 |
|
ENDED |
| 05 |
RING |
|
1 |
|
|
13541435626 |
$1.40 |
|
| 06 |
RUBBER BOOT |
|
1 |
|
04/2003 |
13541437191 |
|
ENDED |
| 06 |
TUBE ELBOW |
|
1 |
|
|
13541435627 |
$12.16 |
|
| 07 |
HOSE CLAMP |
L28-33 |
1 |
|
|
07129952113 |
Removal of the old rubber boots is pretty straight forward.
1. Remove airbox assembly and
disconnect MAF plug
2. Remove MAF by unscrewing the hose clamp connecting it with the
rubber boot (#3)
3. Disconnect the small pipe
connecting on the first boot (Item #3)
4. Unscrew the next hose clamp
and remove the first rubber boot
5. Take a short screw-driver and
with great patience remove the hose clamp that holds the 2nd rubber
boot on the intake manifold.
6. Installation is exactly the
reverse of removal.
Total Time: 1 hour (45 minutes
to remove the intake manifold <-> rubber boot hose clamp).
|