Let me start off by congratulating the BMW engineers for
squeezing the E36 six-cylinder engine into an almost impossibly tight spot. It
is quite a remarkable packaging job, considering they did it in the early 1990s
when all they had were computers with 386 processors and rudimentary 2D CAD
programs. Yet their success makes it a big pain for mechanics who work on these
cars—it’s a tight squeeze, and you have to remove a lot of stuff to remove the
intake manifold.
The best way to learn how to remove the intake manifold is to carefully follow along with these pictures. This task includes one of the steps in the head gasket replacement (Project 17), so a number of other items have already been removed (fan, radiator, belts, etc.). If you’re just pulling the intake manifold, you don’t need to remove these other items.
For this project, I strongly recommend that you get a digital camera and take about a hundred photos of the disassembly process. If you have any questions as to how it was put together beforehand, you can easily refer back to the photos. As an additional resource, the companion CD-ROM to this book (available at www.101Projects.com) contains approximately 300 more photos of the manifold removal and installation process.
Before you begin, let the car sit for about six hours before working on it. The pressure in the fuel lines should have dissipated somewhat, and the car should be stone cold while you’re working on it. Disconnect the battery (see Project 84), as you will be working very close to the starter, which has live current running to it at all times. You will also be disconnecting fuel lines near this connection and don’t want to risk any sparks. Additionally, remove the gas cap from the gas tank to relieve any pressure that may have built up inside the tank from expanding fumes.
Since installation is simply the reverse of removal, just hook everything back up—but carefully inspect the intake boot for cracks prior to doing so. Consider replacing the intake boot while you’re in there, as it may start to crack and break once you’ve disturbed it. Also, watch out for the lower rear manifold mounting bracket, as it can be very difficult to reattach
The best way to learn how to remove the intake manifold is to carefully follow along with these pictures. This task includes one of the steps in the head gasket replacement (Project 17), so a number of other items have already been removed (fan, radiator, belts, etc.). If you’re just pulling the intake manifold, you don’t need to remove these other items.
For this project, I strongly recommend that you get a digital camera and take about a hundred photos of the disassembly process. If you have any questions as to how it was put together beforehand, you can easily refer back to the photos. As an additional resource, the companion CD-ROM to this book (available at www.101Projects.com) contains approximately 300 more photos of the manifold removal and installation process.
Before you begin, let the car sit for about six hours before working on it. The pressure in the fuel lines should have dissipated somewhat, and the car should be stone cold while you’re working on it. Disconnect the battery (see Project 84), as you will be working very close to the starter, which has live current running to it at all times. You will also be disconnecting fuel lines near this connection and don’t want to risk any sparks. Additionally, remove the gas cap from the gas tank to relieve any pressure that may have built up inside the tank from expanding fumes.
Since installation is simply the reverse of removal, just hook everything back up—but carefully inspect the intake boot for cracks prior to doing so. Consider replacing the intake boot while you’re in there, as it may start to crack and break once you’ve disturbed it. Also, watch out for the lower rear manifold mounting bracket, as it can be very difficult to reattach
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