rebuilding an engine
06-18-2009, 01:50 PM
#1
rebuilding an engine
ok guys, i know to rebuild an engine im just having trouble.
i have an os vspec that im doin rod and bearings
im tryin to take the c clip out of the piston to take the rod out but it wont come out. both sides dont curl in the center, ive used exacto blade, a pic, and a needle. any ideas?
EDIT:
ok i FINALLY got it out but now i have an issue, i was getting the bearings out and the back of the exhaust hole broke on the case, will i have to get a new case? heres pics it not bad
i have an os vspec that im doin rod and bearings
im tryin to take the c clip out of the piston to take the rod out but it wont come out. both sides dont curl in the center, ive used exacto blade, a pic, and a needle. any ideas?
EDIT:
ok i FINALLY got it out but now i have an issue, i was getting the bearings out and the back of the exhaust hole broke on the case, will i have to get a new case? heres pics it not bad
Last edited by losi_racer; 06-18-2009 at 02:32 PM.
06-18-2009, 02:35 PM
#3
Tech Master
How da heck did you do that?!
Yes new case is needed.
Yes new case is needed.
06-18-2009, 02:37 PM
#4
the rear bearing wasnt coming out, it actually burnt the rear bearing.
after 20 min of being in the oven i tried forcing the bearin out, it was stuck have way out but it wasnt going. so i put it back in not wanting to mess the case up and i pulled it out about 5 min later and smacked it on my hand, bearing came out, but a piece of the case was in my hand as well
after 20 min of being in the oven i tried forcing the bearin out, it was stuck have way out but it wasnt going. so i put it back in not wanting to mess the case up and i pulled it out about 5 min later and smacked it on my hand, bearing came out, but a piece of the case was in my hand as well
06-18-2009, 02:40 PM
#5
Tech Master
Wow. That's wild.
20 minuets sounds like a long time in the oven. I left mine in 10min and the rear being came loose. I did it on a nova though.
20 minuets sounds like a long time in the oven. I left mine in 10min and the rear being came loose. I did it on a nova though.
06-18-2009, 02:55 PM
#10
First I'm not flaming OS engines. However there cases have been suspect for a long time. That rear bearing should have fell out after 10 mins at 350 degrees. I just did 2 piccos and a Jammin and no problems with rear it always just fell out. However with the fronts you might have to use a little force not much.
Actually I'm for one glad to see you rebuilding it. Theses engines can be rebuilt time and time again as long as the case is in good shape. A dollar saved is a dollar saved no matter how you slice it.
P.S. Don't put your bearings in the freezer before you install them. It's not necessary and a real dumb idea. What happens when metal goes from below freezing to above 200 in seconds.
Actually I'm for one glad to see you rebuilding it. Theses engines can be rebuilt time and time again as long as the case is in good shape. A dollar saved is a dollar saved no matter how you slice it.
P.S. Don't put your bearings in the freezer before you install them. It's not necessary and a real dumb idea. What happens when metal goes from below freezing to above 200 in seconds.
06-18-2009, 02:55 PM
#11
The speed case is the same junk... i would get a JX case
http://cgi.ebay.com/Mugen-Ninja-JX21...3%3A1|294%3A50
http://cgi.ebay.com/Mugen-Ninja-JX21...3%3A1|294%3A50
06-18-2009, 05:44 PM
#12
......just did just that in my mega on-road motor......the wrong way is to force them in with a press/puller......you are wearing out the case....freeze them for 24 hours in a zip loc bag....heat case to 300 or so on a hot plate....put bearings on crank and they should drop right in with no force at all....it's called interference fit......
06-18-2009, 05:59 PM
#14
First I'm not flaming OS engines. However there cases have been suspect for a long time. That rear bearing should have fell out after 10 mins at 350 degrees. I just did 2 piccos and a Jammin and no problems with rear it always just fell out. However with the fronts you might have to use a little force not much.
Actually I'm for one glad to see you rebuilding it. Theses engines can be rebuilt time and time again as long as the case is in good shape. A dollar saved is a dollar saved no matter how you slice it.
P.S. Don't put your bearings in the freezer before you install them. It's not necessary and a real dumb idea. What happens when metal goes from below freezing to above 200 in seconds.
Actually I'm for one glad to see you rebuilding it. Theses engines can be rebuilt time and time again as long as the case is in good shape. A dollar saved is a dollar saved no matter how you slice it.
P.S. Don't put your bearings in the freezer before you install them. It's not necessary and a real dumb idea. What happens when metal goes from below freezing to above 200 in seconds.
......just did just that in my mega on-road motor......the wrong way is to force them in with a press/puller......you are wearing out the case....freeze them for 24 hours in a zip loc bag....heat case to 300 or so on a hot plate....put bearings on crank and they should drop right in with no force at all....it's called interference fit......
You both make very valid points. Now I am curious as to which way is better
06-18-2009, 07:03 PM
#15
Tech Addict
iTrader: (26)
So if I worked with these engines, then would rebuilding a regular car sized motor be wasting my time? Should I just buy a whole new motor everytime?
http://people.bath.ac.uk/ccsshb/12cyl/
http://people.bath.ac.uk/ccsshb/12cyl/