Finnigan
Over 1,000 Posts
I was trying to find my answer on another forum but no one is chiming in...
I have a '71 cb450, total engine rebuild. I torqued the head down to 21 ft/lbs per my factory manual and noticed a slight oil leak from the cylinder base after ~100 mile ride. I looked up the torque specs online and found a table that shows 35 ft/lbs. Thinking I missed something and thus the oil leak I torqued them to 35 spec I found. I haven't started the bike since (I'm installing a new AF sensor) but a new thread popped up that someone else had done the same thing and no one could tell him whether the motor was at risk. I've found other threads for high horsepower motors (500+) that recommend a rebuild but can my small 46 hp survive high torqued head?
Bottom line - Do I need to replace my rods/gaskets/washers? Can I run the engine with higher torque values? Can I simply back off the nuts and torque to lower torque specs?
I have a '71 cb450, total engine rebuild. I torqued the head down to 21 ft/lbs per my factory manual and noticed a slight oil leak from the cylinder base after ~100 mile ride. I looked up the torque specs online and found a table that shows 35 ft/lbs. Thinking I missed something and thus the oil leak I torqued them to 35 spec I found. I haven't started the bike since (I'm installing a new AF sensor) but a new thread popped up that someone else had done the same thing and no one could tell him whether the motor was at risk. I've found other threads for high horsepower motors (500+) that recommend a rebuild but can my small 46 hp survive high torqued head?
Bottom line - Do I need to replace my rods/gaskets/washers? Can I run the engine with higher torque values? Can I simply back off the nuts and torque to lower torque specs?
