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Accessory Belts Replacement
 
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Pelican Technical Article:

Accessory Belts Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$6 to $30

Talent:

**

Tools:

(2) 17mm, (2) 13mm wrenches, floor jack, jack stands, wheel chocks, torque wrench, safety glasses

Applicable Models:

Porsche 944 (1983-89)
Porsche 944 S2 (1989-91)
Porsche 944 Turbo (1986-89)
Porsche 944S (1987-88)

Parts Required:

New belts

Hot Tip:

Make sure to clean the grease and dirt off the turnbuckle nuts

Performance Gain:

Proper running accessories

Complementary Modification:

Change air filter

Depending on how your car is accessorized, there are two accessory belts on the Porsche 944. Both belts are on the front of the motor and are powered from the main crank pulley. While you can change out the power steering pump belt by itself, you need to remove the power steering belt to replace the A/C and alternator belt. Both belts are held in tension by a turnbuckle with double nuts on them. Make sure to clean the turnbuckles before putting a wrench on them, as you do NOT want to strip out the double nuts.

You should check your belts every six months for wear, cracking, fraying, delaminating and drying out. If your belt shows any of these signs you should replace it. I recommend you buy two belts and always keep an extra one in the car. You don't want to be stranded on the side of the road for the lack of a spare drive belt.

You will change the belts from below so you will need to raise and support the front of the vehicle; please see our article on safely raising and supporting your Porsche for additional assistance.

With the vehicle safely raised and supported, remove the under engine tray (red arrow).
Figure 1

With the vehicle safely raised and supported, remove the under engine tray (red arrow). Please see our article on under tray removal for additional assistance.

Both belts are driven by the main crankshaft pulley (red arrow).
Figure 2

Both belts are driven by the main crankshaft pulley (red arrow). The power steering pump is located on the right lower side of the motor (yellow arrow). The belt behind the power steering belt drives the alternator (blue arrow) and A/C compressor (green arrow).

Both belts are kept in tension by turnbuckles (red and yellow arrows).
Figure 3

Both belts are kept in tension by turnbuckles (red and yellow arrows).

On the power steering pump, begin by loosening the 13mm bolt on the top of the power steering mount (red arrow, hidden behind the pulley).
Figure 4

On the power steering pump, begin by loosening the 13mm bolt on the top of the power steering mount (red arrow, hidden behind the pulley). Then make sure the turnbuckle is clean and free of grease and oil (yellow arrow).

Use two 13mm wrenches and separate the double nuts on each end of the turnbuckle (red and yellow arrows).
Figure 5

Use two 13mm wrenches and separate the double nuts on each end of the turnbuckle (red and yellow arrows).

With the nuts loose, use the 13mm wrench and turn the turnbuckle so that it loosens tension on the belt (red arrow).
Figure 6

With the nuts loose, use the 13mm wrench and turn the turnbuckle so that it loosens tension on the belt (red arrow).

If there is not enough slack in the belt, use a 13mm wrench or socket and remove the mounting bolt on the pump (red arrow).
Figure 7

If there is not enough slack in the belt, use a 13mm wrench or socket and remove the mounting bolt on the pump (red arrow).

With the turnbuckle free you can move the pump towards the center of the engine (red arrow) and remove the belt.
Figure 8

With the turnbuckle free you can move the pump towards the center of the engine (red arrow) and remove the belt. Installation of the new belt is the reverse of removal.

To replace the alternator and A/C belt, begin by using a 17mm wrench and loosening the pivot bolt on the A/C compressor (red arrow).
Figure 9

To replace the alternator and A/C belt, begin by using a 17mm wrench and loosening the pivot bolt on the A/C compressor (red arrow).

Use two 17mm wrenches and separate the double nuts on each end of the turnbuckle (red arrow).
Figure 10

Use two 17mm wrenches and separate the double nuts on each end of the turnbuckle (red arrow). With the nuts loose, use the 17mm wrench and turn the turnbuckle so that it loosens tension on the belt.

If there is not enough room to remove the belt you can disconnect the turnbuckle from the A/C mount and slip the belt off (red arrow).
Figure 11

If there is not enough room to remove the belt you can disconnect the turnbuckle from the A/C mount and slip the belt off (red arrow). Installation is the reverse of removal.



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