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  #1  
Old 03-31-2005, 06:47 PM
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Default 400 EX Headbolt torque

Would someone please tell me the correct torque for the head bolts when re-assembling a 400 EX. I'm assuming all 4 bolts are the same.
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  #2  
Old 03-31-2005, 07:28 PM
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Default 400 EX Headbolt torque

Which bolt are you refering to I would be more than happy to look it up.
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  #3  
Old 03-31-2005, 09:20 PM
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Default 400 EX Headbolt torque

The cylinder head nuts ( acorn headed ) are torqued to 33 foot pounds


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  #4  
Old 03-31-2005, 09:36 PM
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Default 400 EX Headbolt torque

The 4 nuts are listed at 44N.m 4.5kgf.m and 32lbf.ft the 13 bolts (8mm) are listed as 22n.m 2.2kgf.m 16lbf.ft also take note the specs are for a '05
if you want I can scan the page.
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Old 03-31-2005, 09:43 PM
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Default 400 EX Headbolt torque

Only one of those bolts on the cylinder head cover is a 8mm bolt, The other 12 are 6mm bolts.
Your specs are not the same as listed in my Honda service manual

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  #6  
Old 03-31-2005, 09:53 PM
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Default 400 EX Headbolt torque

Quote:
Originally posted by: Gimpster
Only one of those bolts on the cylinder head cover is a 8mm bolt, The other 12 are 6mm bolts.
Your specs are not the same as listed in my Honda service manual

----- Gimpster -----
oops! you are correct the 6mm bolts are not listed in my manual under that section. Under standard touque values it states 6mm nuts and bolts have a value of 22N.m 1.0kfg.m 7lbf.ft I hope this helps.
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  #7  
Old 03-31-2005, 09:54 PM
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Default 400 EX Headbolt torque

It also states to tighten those bolts in a crisscross pattern
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  #8  
Old 03-31-2005, 10:21 PM
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Default 400 EX Headbolt torque

Many thanks to those who replied. This gives me all the information I need.
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  #9  
Old 03-31-2005, 10:50 PM
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Default 400 EX Headbolt torque

I am glad to help out a fellow rider [img]i/expressions/face-icon-small-smile.gif[/img] If you want I can get you a link to where you can buy the shop manual, for around $40 US
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  #10  
Old 03-31-2005, 11:17 PM
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Default 400 EX Headbolt torque

I don't know if this is to late. but the 8mm bolt is torqued to 17 ftlbs. and the rest of the bolst are only 88 INCH ILBS. i know this for a fact because i had to Heli coli all my bolts becaue i over torqued them.. if you need anymore help let me know. i just put mine back together.
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Old 03-31-2005, 11:17 PM
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02, 1999, 400, 400ex, 99, atvs, bolt, bolts, cover, cylinder, head, honda, placement, tor, torque



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