Bleeding Air from Cooling System - HCS Snowmobile Forums

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Old 01-16-2010, 06:57 PM   #1 (permalink)
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Current Sled(s): 12 F1100 TURBO LT & 11 XF SP LT
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Does any one have the official procedure? Hints, Tricks

Thanks

Rob
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Old 01-16-2010, 07:31 PM   #2 (permalink)
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Pictures would help, but the bleed screw on the head is between the two exhaust ports. From the service manual is below.

FILLING/BLEEDING COOLING
SYSTEM

1. Remove the hood and the left-side and right-side
access panels; then remove the torx-head screws
securing the console.

2. Move the console up and forward; then with the
harness connected, securely position the console
on the snowmobile.

3. On the non-turbo models, remove the headlight
support bracket/heat shield.

4. On the turbo models, loosen the cap screws securing
the heat shield to the exhaust manifold/turbocharger;
then using a deep socket and hammer, tap
the washers making sure that the washers are free
from the head of the cap screws. Remove the cap
screws and move the heat shield to access the
bleed screw.

5. Loosen the bleed screw and add coolant into the
filler neck until coolant is visible at the bleed
screw; then tighten the bleed screw and add coolant
to the coolant reservoir Full-Cold line.

6. Start the engine and allow it to run for five minutes.

7. With the engine cool, loosen the bleed screw and
allow the coolant level in the filler neck to drop;
then with the bleed screw loose, add coolant into
the filler neck until no air is visible or heard at the
bleed screw. Tighten the bleed screw and add coolant
to the reservoir if necessary.

��NOTE: If the coolant level in the filler neck suddenly
drops when the bleed screw is loosened, an
air-lock occurred in the cylinder head. Add coolant
to the filler neck until full before starting the
engine.

8. Start the engine and allow it to run for five minutes;
then shut the engine off and allow it to cool.

9. Repeat steps 7-8 at least two more times (more if
necessary) until no air is in the cooling system.

! CAUTION
Be sure the cooling system is thoroughly filled and
bled using the following procedure.

! CAUTION
The Filling/Bleeding Cooling System procedure must
be followed very closely and the cooling system must
be properly filled. If the system isnít properly filled,
engine damage will occur.

! CAUTION
Use care not to allow the console harness to come
into contact with the exhaust pipe during this procedure.

! CAUTION
Make sure the washers are free from the head shield
cap screws or damage to the heat shield will occur.

! CAUTION
Running the engine with low coolant level can cause
severe engine damage.

! CAUTION
Operating the snowmobile with air in the cooling system
will cause severe damage to the engine.

10. On the non-turbo models, install the headlight support
bracket/heat shield.

11. On the turbo models, place the heat shield into
position and secure with the cap screws. Tighten
the cap screws to 96 in.-lb.

��NOTE: Apply a film of anti-seize to the threads of
the heat shield cap screws before installing.

12. Position the console assembly on the headlight
support bracket; then secure the console with the
two torx-head screws.

13. Install the hood; then install the side access panels
and secure with existing mounting hardware.
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Old 01-16-2010, 11:57 PM   #3 (permalink)
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If possible, lift the front of the sled as high as you can get it. If you dont, you will be repeating steps 6,7 and 8 so many times, you will think will this ever end...??

My skis were 12 inches of the ground before I could get all the air out. Took me 6 times of the 6-8 steps after I raised it up that high.
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Old 01-17-2010, 10:20 AM   #4 (permalink)
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Join Date: Mar 2006
Posts: 682
Current Sled(s): 12 F1100 TURBO LT & 11 XF SP LT
Previous Sled(s): All Cats
Location: Sandusky, OH
Favorite Riding Area: W.NY, Mich, Lake Erie ICE!
10-11 Mileage: 3K
Age: 32
Riding Since: 1979
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Thanks Steve and Agrat. I opend the srew up last year to bleed it when my coolant resevoir line burnt, but didn't follow any specific procedure.
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