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View Full Version : torque specs for cam and head


cals400ex
06-27-2006, 02:29 PM
i was wonder what the torque specs were for the head studs and the cam sprocket bolts? it will have the hotcams in it but i assume they are the same cam torque specs. i don't know if they changed much but it is a 2003 if that matters.
cals400ex
06-27-2006, 03:18 PM
ok, i found out that the head gets torqued to 33.5 ftlbs but i still need to know what the cam sprocket gets torqued to.
nator187
06-28-2006, 07:56 PM
7ft/lbs or 84in/lbs
YFZ450Ridr
06-28-2006, 08:06 PM
here ya go!
cals400ex
06-29-2006, 05:04 PM
thanks for the help guys. it is for a friend of mine and the damn service manual has not came in yet and we were sick of waiting.

i dont' see the camshaft sprocket torque on that chart?
cals400ex
06-29-2006, 05:07 PM
also, i don't know if anyone has had a problem but we cracked the exhaust camshaft holder while torquing the head cover on. we had it set to 10 ft-lbs and we didn't even get it that tight and that cam holder cracked. i don't know if this is a common problem or if we just had some bad luck.

is there a cheap place to order suzuki parts online? something like service honda, but for suzuki's? the quicker the shipping the better too. thanks again
nator187
06-29-2006, 09:07 PM
See the part that says "Camshaft journal holder bolt"... 7ft/lbs like I said.

I can pull my head down and switch cams in my sleep.

Nator187
cals400ex
06-29-2006, 11:04 PM
nator, i thought that torque was for the 8 bolts on top of the head that hold the camshaft holders down and not for the cam sprocket? :ermm:
cals400ex
07-04-2006, 12:07 AM
just for reference, i talked to hotcams and they said the cam sprocket bolts get torqued to 14 ft-lbs.
YFZ450Ridr
07-04-2006, 11:08 AM
Originally posted by cals400ex
just for reference, i talked to hotcams and they said the cam bolts get torqued to 14 ft-lbs.

that is scanned straight out of my service manual...
nator187
07-04-2006, 08:05 PM
You go ahead and do 14ft/lbs. I'm going to bet 6/8 of those bad boys are going to rip the threads out of the head.

Nator187
cals400ex
07-06-2006, 05:54 PM
Originally posted by nator187
You go ahead and do 14ft/lbs. I'm going to bet 6/8 of those bad boys are going to rip the threads out of the head.

Nator187



how would tightening the cam sprocket to the cam rip threads out of the head??????:huh
cals400ex
07-06-2006, 05:56 PM
hotcam says to torque the cam holders to 7.2 ft-lbs while the manual says 7 ft-lbs, this is close enough.