Posted by trucker40 on July 17, 2008 at 06:50:57 from (68.91.95.4):
In Reply to: About time posted by Lanse on July 16, 2008 at 18:42:49:
If nobody knows the torque on those bolts there is a chart somebody had not too long ago on here that is a general specification for bolts by their size that you could use for that.Another place to ask the torque on bolts is where you buy parts might have a way of looking it up.I dont know about changing the oil after 15 minutes of running,unless you put a new cam in,but you want to change it quick.A lot of the reason is that when you have a motor apart it gets a lot of dust inside that you might not even see.The oil washes this down into the pan,and you want to get it out.But you could probably run it a week or 2 first if you didnt change the cam.You want to run it enough that you think its going to be alright before you change it.Sure the filter should take a lot of it out,but I like to change the oil quick since I had an oil pump sieze up on me a while back right after I rebuilt a motor.Took it apart and it had a lot of small pieces of metal in the pump which siezed it.Only thing I can think of since I washed it out at the car wash before I put it together is that those peices of metal were laying in there somewhere and they got washed down by the oil and picked up in the pickup tube and locked the oil pump,since I had a new pickup and screen and oil pump on the motor.I also had a new cam and lifters too,but I changed the oil after 20 minutes of running the motor at 2000 RPM.I have rebuilt lots of motors before that and never had any trouble with them.Changed cams too.I guess it shows that its hard to get a motor clean enough when you rebuild it.Maybe somebody can tell you about those particular seals.Some need oil,some you dont even want to touch the sealing surface because the oil on your skin will mess them up.Thats on accessory drive seals on Cummins motors,made out of some kind of stuff like teflon.I doubt that your seals are like that,but I dont know about those motors.Some seals have a tool that comes with them usually made out of plastic,to install them with,thats on Caterpillar crank seals if I remember right.I dont want to overload your mind with information,but I thought it might be an opportunity for you to see that there are lots of things to consider when you build a motor,even more than what you have with a complicated motor like yours.You have to learn a lot to be a mechanic,but its fun for me.Ask lots of questions,especially mechanics that work on motors like that will know lots of things you wont find in a book.I think you will want to leave the oil in until you have the valves adjusted right,its running good,and youve worked it a little to see if its alright.
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