ok i just finished my rebuild on my gsr put new acl racing main, rod bearings and trust washers and also added some arp rod bolts and head studs. Well heres the question should i dog it to break in the rings or should i just wait so many miles?? i just test drove it and it drives smooth!!

 

NOTHING??!

 

What type of rebuild did you do? All it sounds like is you replaced bearings which take no break in process.

 

ohh sorry i got some new npr piston rings too.

 

ok rebuild has.

ACL Racing Bearing (rods, main, trustwashers)
NPR Piston rings
Glazed honed block
Arp rod bolts
Arp head studs
new head gasket


Should i Wait or dog it and brake it in???? Ive heard to wait 500 miles and then change the oil and i also heard to dog it and break the piston rings in...


Modified by GSR_hatch936 at 12:08 PM 6/1/2008

 

You should do your own research to determine break in periods and engine loads. all bearing and ring manufacturs will supply this information if you contact them. My personal experince is just a ring job you dont have to worry about but with new bearings you need to wait 3k miles or first oil change. the bearings have to go through some warm up cylces and jamin on it to early can spin a bearing or chew the coating off of it real quick. Did you ever figure out your bearing clearance problem, or you just left it the way it was.

 

Yea i left them that way.. I measured mine in MM. Maybe i should say its .002 in inches.. What u think?

 

Everyone has different break in procedures. But since you did the rings youll have to break in the rings. This is the break in i follow, youll find others online as well or like mentioned call the manufactures and see what they say.

http://laskeyracing.com/shop/breakin.htm

 

thanks for the link!

 

even though it is to late cause you are already running it but .002 is way not enough and in fact the motor probally wouldnt even turn with that clearance but whatever next time you build one need to make sure to stick to oem specks unless told by bearing company. good luck with your motor

 

hrmm.. its running good. Yea i understand that its to much clearance but when i torque it with the plastiguage i torqued it down in this sequences 1,5 56ft-lb, and 2,3,4, to 49ft-lb if i remember right i torqued them a couple of ft-lb more sence i had an extention.

 

here's my bearings that i bought i think it says to have .001 extra clearance.? heres the link.

http://www.aclperformance.com....s.htm

 

there are two diffrent part numbers there one is standard and the other one that ends in hx has a extra .001 in oil clearance but if I remember right you were still had a little too much clearance. like i said it just means that the life of the motor wont be as long as it could be. but it will be alright. enjoy it and break it in before you jam on it.

 

Ok Ty for the Info and the help!!