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Turbo Brake Booster Heat Shield Removal
 
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Pelican Technical Article:

Turbo Brake Booster Heat Shield Removal

Steve Vernon

Time:

4 hours4 hrs

Tab:

$5

Talent:

**

Tools:

11mm, 10mm socket, extensions, universal joint, 10mm wrench, flathead screwdriver

Applicable Models:

Porsche 944 Turbo (1986-89)

Parts Required:

Heat shield, dipstick tube gasket

Hot Tip:

Let the exhaust cool down before beginning

Performance Gain:

Proper protection of the braking system

Complementary Modification:

Brake bleed

There is a heat shield on the Porsche 951 that protects the heat from the turbo from affecting the performance of the braking system. The brake booster, master cylinder, lines and reservoir are all located just above and to the side of the turbo. This shield is a very important part of the vehicle but a bit of a pain to remove and install. The shield must come off for work on the brake booster as well as removing the turbo. Due to the difficulty in removing and installing it some people neglect to reinstall it after working on the turbo or brakes. If your car does not have this shield you should get and install one right away.

This article will show you how to remove the shield so you can get access to the turbo or brake booster. Note: it is not uncommon for some of the hardware to be missing or substituted. Make sure you are using the right tool before attempting to remove a fastener.

As always make sure the motor is cool enough to work around. You will need to remove the intake manifold to remove the heat shield.

The heat shield is located on the left side of the vehicle (red arrow) and protects the braking system from the heat of the turbo.
Figure 1

The heat shield is located on the left side of the vehicle (red arrow) and protects the braking system from the heat of the turbo.

The bracket that holds the turbo coolant pump (red arrow) also assists in holding the heat shield in place.
Figure 2

The bracket that holds the turbo coolant pump (red arrow) also assists in holding the heat shield in place.

This photo illustrates the location of the heat shield (red arrow) in proximity to the turbo (yellow arrow).
Figure 3

This photo illustrates the location of the heat shield (red arrow) in proximity to the turbo (yellow arrow).

There is a 10mm bolt behind the turbo coolant pump (yellow arrow) that you must carefully remove and make sure it does not fall back into the engine area.
Figure 4

There is a 10mm bolt behind the turbo coolant pump (yellow arrow) that you must carefully remove and make sure it does not fall back into the engine area. Next, remove the 10mm nut on the top of the bracket (red arrow).

You do not need to open up the cooling system to perform this work.
Figure 5

You do not need to open up the cooling system to perform this work. Disconnect the wiring (green arrow). Loosen the 13mm bolt and slip the coolant pump (red arrow) out the bottom of the bracket. There is a coolant line attached to the bottom of the pump (yellow arrow) that you can leave attached. If you decide to remove them you will need to drain the coolant below this level.

Remove the 10mm bolt hold in the A/C lines (red arrow) and slip the coolant pump bracket out.
Figure 6

Remove the 10mm bolt hold in the A/C lines (red arrow) and slip the coolant pump bracket out. Next, remove the three 11mm nuts from the lower shield (yellow arrows).

There is an additional 11mm nut where the shield meets the firewall behind the oil fill tube (red arrow).
Figure 7

There is an additional 11mm nut where the shield meets the firewall behind the oil fill tube (red arrow).

Remove the dipstick by pulling it straight out (red arrow) and then you can remove the shield.
Figure 8

Remove the dipstick by pulling it straight out (red arrow) and then you can remove the shield. You may need to use a long flathead screwdriver to help pry the lower section of the shield off the studs.

With the shield out of the vehicle you can see the mounting points.
Figure 9

With the shield out of the vehicle you can see the mounting points. The yellow arrows indicate where the studs for the 11mm nuts go. The red arrow indicates where the 10mm bolt goes through to the coolant pump mounting bracket. Installation is the reverse of removal.


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Page last updated: Wed 12/7/2016 02:50:38 AM