2004 Wr450


3 replies to this topic
  • Christine

Posted September 02, 2009 - 09:47 PM

#1

Can someone please give me the valve clearances for a 2004 WR450 head and also the cylinder head torque?

Thanks in advance!

  • PBDBLUE

Posted September 03, 2009 - 05:47 AM

#2

Valve clearance (cold):
Intake valve:
0.10 ~ 0.15 mm
(0.0039 ~ 0.0059 in)
Exhaust valve:
0.20 ~ 0.25 mm
(0.0079 ~ 0.0098 in)

The head torque is not that straight forward. Here's the procedure from the manual. I can't post the drawing of the tightening sequence but basically it's left rear, right front, left front, right rear. Done it many times and it works:

Installation steps:
CAUTION:
Tighten the cylinder head using the rotation
angle procedure to obtain uniform
tightening torque.
Wash the threads and contact surfaces of
the bolts, the contact surfaces of the plain
washers, the contact surface of the cylinder
head, and the threads of the crankcase.
Apply the molybdenum disulfide grease on
the threads and contact surfaces of the
bolts and on both contact surfaces of the
plain washers.
Install the plain washers and bolts.
Tighten the bolts to the specified torque in
two or three steps in the proper tightening
sequence as shown.
Torque Bolts (cylinder head):
1st:
30 Nm (3.0 m • kg, 22 ft • lb)
Remove the bolts.
Again apply the molybdenum disulfide
grease on the threads and contact surfaces
of the bolts and on both contact surfaces
of the plain washers.
Retighten the bolts.
NOTE:
Tighten the bolts to the specified torque in
two or three steps in the proper tightening
sequence as shown.
Torque Bolts (cylinder head):
2nd:
20 Nm (2.0 m • kg, 14 ft • lb)
Put a mark on the corner 1 of the bolt
(cylinder head) and the cylinder head 2
as shown.
NOTE:
Tighten the bolts 90° in each of the two
steps to reach the specified angle of 180° in
the proper tightening sequence as shown.


Torque Bolts (cylinder head):
Final:
Specified angle 180°

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  • Christine

Posted September 03, 2009 - 06:14 AM

#3

Valve clearance (cold):
Intake valve:
0.10 ~ 0.15 mm
(0.0039 ~ 0.0059 in)
Exhaust valve:
0.20 ~ 0.25 mm
(0.0079 ~ 0.0098 in)

The head torque is not that straight forward. Here's the procedure from the manual. I can't post the drawing of the tightening sequence but basically it's left rear, right front, left front, right rear. Done it many times and it works:

Installation steps:
CAUTION:
Tighten the cylinder head using the rotation
angle procedure to obtain uniform
tightening torque.
Wash the threads and contact surfaces of
the bolts, the contact surfaces of the plain
washers, the contact surface of the cylinder
head, and the threads of the crankcase.
Apply the molybdenum disulfide grease on
the threads and contact surfaces of the
bolts and on both contact surfaces of the
plain washers.
Install the plain washers and bolts.
Tighten the bolts to the specified torque in
two or three steps in the proper tightening
sequence as shown.
Torque Bolts (cylinder head):
1st:
30 Nm (3.0 m • kg, 22 ft • lb)
Remove the bolts.
Again apply the molybdenum disulfide
grease on the threads and contact surfaces
of the bolts and on both contact surfaces
of the plain washers.
Retighten the bolts.
NOTE:
Tighten the bolts to the specified torque in
two or three steps in the proper tightening
sequence as shown.
Torque Bolts (cylinder head):
2nd:
20 Nm (2.0 m • kg, 14 ft • lb)
Put a mark on the corner 1 of the bolt
(cylinder head) and the cylinder head 2
as shown.
NOTE:
Tighten the bolts 90° in each of the two
steps to reach the specified angle of 180° in
the proper tightening sequence as shown.


Torque Bolts (cylinder head):
Final:
Specified angle 180°


Thanks, Great info!

  • TLRam1

Posted September 03, 2009 - 05:51 PM

#4

I needed that also Christine, thanks for asking.




 
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