Instructables
loading
loading

Replace air intake rubber boot on BMW M50 engines (E34)

Picture of Replace air intake rubber boot on BMW M50 engines (E34)
Rubber hoses and other parts, especially ones subjected to extreme temperatures or vibration, tend to loose their flexibility and crack or tear. Thus it's important to keep an eye on those on older cars. This time around I found cracks on the main air intake boot. A quick check on part availability on pelican parts revealed, that it's a comparatively cheap ($25) part, so I ordered it and once it arrive I headed to TechShop (http://www.techshop.ws/), where I usually do all my car repairs.
 
Remove these adsRemove these ads by Signing Up

Step 1: Scope of work

Picture of Scope of work
This work is relatively easy. You will need to take out air intake filter housing with air temperature sensor housing (attached to it) in order to get good access.

Step 2: Remove alternator cooling hose

Picture of Remove alternator cooling hose
E34-UnderTheHood-41.jpg
E34-UnderTheHood-38.jpg
In order to gently remove air filter housing you'll need to get rid of front half of the alternator cooling hose. Gently remove locking pin from the top half of the pipe mount and then pull the front of the pipe up until it becomes loose. Leave the second half attached to the alternator, it's not getting in the way.

Step 3: Prepare air filter housing for removal.

Picture of Prepare air filter housing for removal.
E34-UnderTheHood-37.jpg
E34-UnderTheHood-1.jpg
E34-UnderTheHood-32.jpg
E34-UnderTheHood-33.jpg
E34-UnderTheHood-44.jpg
E34-UnderTheHood-26.jpg
E34-UnderTheHood-35.jpg
Detach air temperature sensor connector buy turning it about 90-120* counter clockwise and pulling it off. Loosen clamp holding rubber boot around air sensor housing. Loosen two nuts holding the air filter housing. One of the locations is hard to get to, so you might need one of these (pictured) small step click wrenches. Also remove auxiliary thermostat, attached to the air filter housing.

Step 4: Remove filter housing

Picture of Remove filter housing
E34-UnderTheHood-31.jpg
Once you verified that, nothing else is holding the filter box, start lifting it up while gently pulling the rubber intake boot off. It can be done by squeezing one side of the boot. If everything done right, the filter box should come out without any complications.
shalon1 month ago
Am planning to replace my BMW e34 525i m50 oxygen sensor but I Dont have a clue where to find it.can you please help