Coolant Line/Hose: Service and Repair

Removing and Installing Coolant Hose At Front Left (Y-Type Coolant Distributor)




Tools


Removal

1. Unscrew wheel bolts of the front left wheel.

2. Raise the vehicle at the prescribed support points.

3. Remove left front wheel. To do this, remove the wheel bolts and take the wheel off.

4. Remove front underbody cover.

5. Remove the front part of the left wheel housing liner.





6. Undo and remove the left diagonal brace between the body and the side member. To do this, unscrew the two fastening screws M 12 x 25 -(arrow)-.

NOTE: Pull off the complete flange on the radiator. Do not loosen the hose clamp.





7. Drain coolant. To do this, unclip the -locking spring- on the flange for the coolant hose and pull the coolant hose off. Approx. 5 liters of coolant will pour out. Collect the coolant.





8. Pull the pipe holder off the support after first lifting the holding straps somewhat with a small screwdriver. Then pull the coolant line with the holder off the support.

9. Push the right hose clamp down. Loosen the hose clamp at the connection between the coolant pipe of the left radiator and the Y-type distributor, then remove the complete coolant line between the radiator and the Y-type distributor.

WARNING:
Risk of damage to the coolant pipe when the coolant hose is cut open
- Do not cut too deeply when cutting open the coolant hose.

10. Loosen hose clamp at the inner coolant pipe (to the middle radiator) and at the Y-pipe distributor. In order to facilitate work when pulling off the hose connection, cut the hose open vertically with respect to its end face over a length of approx. 4 cm. The coolant pipe must not be damaged during this procedure.





11. Loosen the lower hose clamp. Loosen the hose clamp at the connection point between the Y-pipe and the coolant pipe.

12. Pull off the Y-type coolant distributor. To do this, pull the Y-type distributor off its three connection points and take it out of the installation area.


Installation

1. Put the two hose clamps back onto the connections which lead to the radiators. Fit the hose clamp above the lower flange.

NOTE: In order to facilitate fitting, wet the inside of the coolant hose with water in the fitting area and push the hose onto the coolant pipes.

2. Return the Y-type distributor to installation position and push on the three connections.

3. Refit the rear hose clamp on the connection point of the Y-type distributor and on the coolant pipe of the middle radiator.

4. Re-position the hose clamp between the Y-type distributor and the left radiator. Tighten the hose clamp.





5. Re-position the lower hose clamp on the Y-type distributor and tighten it.





6. Push the -locking clip- back onto the radiator flanges. Make sure that the locking clip has been properly inserted when doing this.





7. Position the coolant line in relation to the left radiator and clip the holder in again.

8. Replace the O-ring on the coolant hose flange.





9. Wet the O-ring with plenty of water in order to facilitate fitting the coolant hose. Push on the coolant hose. Press the coolant hose firmly onto the connection neck. The locking clip of the hose fitting must audibly engage. Then re-check the correct fitting by tilting and pulling on the coolant hose.

WARNING:
Coolant hose can pop off
- Check whether the coolant hose fitting is securely seated.
- Never treat hose connections with a lubricant such as Vaseline or spray oil.





10. Check whether the locking spring at the radiator flange is properly seated. The locking spring must be positioned between the two integral guides.





11. After fitting the Y-type coolant distributor, additionally check the position of the locking springs and whether the coolant drain cocks are correctly engaged. The bows of the locking springs must always point up.

12. In order to check proper engagement, manually turn the flange of the drain cocks counterclockwise and clockwise. There must be approx. 1 mm play in both directions.




Turn drain cock counterclockwise




Turn drain cock clockwise





13. Fit and fasten the left diagonal brace.
Tightening torque 100 Nm (74 ftlb.).

14. Fit front part of the wheel housing liner and the underbody cover.

15. Mount front wheel. Tighten the wheel bolts.
Tightening torque 130 Nm (96 ftlb.).

16. Fill in coolant and bleed the cooling system in connection with the Porsche System Tester 2. To do this, select menu item "Special function", See "Draining and filling in coolant".

17. Then check the cooling system for leaks.