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Pelican Technical Article:

S-Hose Replacement

Time:

2 hours2 hrs

Tab:

$30

Talent:

**

Tools:

15mm socket, flathead screwdriver

Applicable Models:

Porsche 911 (1965-74)
Porsche 911 Carrera (1974-89)
Porsche 911E (1969-71, 1973)
Porsche 911L (1968)
Porsche 911S (1967, 1969-71, 1973-77)
Porsche 911SC (1978-83)
Porsche 911T (1969-71, 1973)

Parts Required:

S-hose, 2 washers, oil

Hot Tip:

The S-hose will be full of oil

Performance Gain:

Proper cooling

Complementary Modification:

Change oil filter

One of the most commonly overlooked hoses on a 911 is the S-hose. This hose is responsible for the main supply of clean oil to the pump and motor. The hose is in a very exposed area and is subject to a great deal of heat. Over time these hoses can get brittle and fail, usually near the hose clamps. If the hose fails under driving conditions, not only will you be dumping oil near your rear tires, you will quickly starve the motor of oil leading to catastrophic results.

You should check the condition of the S-hose at every oil change and replace it at the first signs of trouble.

This photo illustrates the S-hose (red arrow) that connects to the oil tank (green arrow) and the motor at the bottom of the oil cooler (yellow arrow).
Figure 1

This photo illustrates the S-hose (red arrow) that connects to the oil tank (green arrow) and the motor at the bottom of the oil cooler (yellow arrow).

Begin draining the oil from the oil tank.
Figure 2

Begin draining the oil from the oil tank. Use a 15mm socket and remove the plug (red arrow). You do not need to change the filter. However, if you are close to an oil and filter change, now would be a good time to do it. Please see our article on oil and filter change for additional assistance.

Use a 15mm socket and drain the oil from the sump plate (red arrow).
Figure 3

Use a 15mm socket and drain the oil from the sump plate (red arrow).

Be sure to check the magnetic plug inside the drain plugs and clean it of any small shavings (red arrow).
Figure 4

Be sure to check the magnetic plug inside the drain plugs and clean it of any small shavings (red arrow). If you have anything larger than the type of micro shavings or metal sludge here, you may have serious problems with your motor that warrants further investigation. Install new washers (yellow arrow) on both plugs and reinstall the plugs.

Use a flathead screwdriver and remove the hose clamp and hose from the oil tank (red arrow).
Figure 5

Use a flathead screwdriver and remove the hose clamp and hose from the oil tank (red arrow).

When removing the S-hose from the oil tank use caution.
Figure 6

When removing the S-hose from the oil tank use caution. The hose will have a fair amount of residual oil in it (red arrow).

Clean the outlet of the oil tank (red arrow).
Figure 7

Clean the outlet of the oil tank (red arrow).

Use a flathead screwdriver and remove the hose clamp and hose from where it joins the motor at the bottom of the oil cooler (red arrow).
Figure 8

Use a flathead screwdriver and remove the hose clamp and hose from where it joins the motor at the bottom of the oil cooler (red arrow). Clean this area before installation.

Install the new S-hose between the tank and engine.
Figure 9

Install the new S-hose between the tank and engine. Tighten the hose clamps on the tank (red arrow) and engine (yellow arrow).

Do NOT forget to refill your engine with oil (red arrow).
Figure 10

Do NOT forget to refill your engine with oil (red arrow). Start the engine and double check for leaks and oil level.

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Comments and Suggestions:
Space_Zorro Comments: I got so lucky - I noticed something odd driving one night and the next morning a pool of oil was in the driveway. The S hose had a 1" crack at the oil cooler end next to the clamp. Changed out to all new everything, hose, genuine clamps, filter, sump plate, new drain plugs etc. I'll always replace s hose at any sign of wear/age.
February 12, 2015
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 

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