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View Full Version : Sr20 Crankshaft help!!!Beariings


240sxdrifted
05-12-2009, 06:09 AM
i am rebuilding my sr20 and got the crank turned by a machine shop they said they took 2 off...whatever that means...my question is how do i get the right size bearings for a crank that is turned????

Propaganda
05-12-2009, 08:24 AM
You order them, DUH!!!

You get the right size by getting a machine shop to measure the diameter of your crankshaft and the bore..

I think that a machine shop would tell you what you need if you ask. Unless you try to measure it yourself (tools cost lots of moneys)

ballinnmiami240sx
05-12-2009, 08:33 AM
you will have to mic the crank, mains, and rod bore to get everything right. If your machine shop was any good they shoiuld have asked what bearings you would be going to get and then machine the crank and connecting rod to spec.

I just went thru this and I have the machine shop mic everything to ACL race bearing specs.

and took 2 off....WTF is that!!!

landins13
05-12-2009, 09:12 AM
2 one thousanths, they milled the crank down 2 one thousands so you would need to order bearings that are 2 one thousanths thicker than stock, but either way you want a machine shop to mill the connecting rods and bearing to be perfect. call and ask they will tell you what you need.

hopefully for your sake you went to a machine shop that has dealt with rwd sr20's before because the mill specs on the fwd sr's is different

240sxdrifted
05-12-2009, 10:51 AM
so i went into the machine shop today and they ordered bearings to what they say is the right size but on the box it said sr20de...not det..WTF...i also took in the rods and they are gonna make sure everything is to spec on those...

i live in montana...only 1 machine shop in the area!!!!!

Propaganda
05-12-2009, 12:44 PM
Calm the fuck down.. you can use SR20DE bearings with the SR20DET

What the guy above you meant was that the oil clearances between the SR20DE & SR20DET are different so they may have taken too much or too little off of the crank shaft.