here are the pics of the minor destruction.


This is the rod im iffy on, dont know if i should replace it. (the one on the right) where the bearing would lay on top is dicolored. Its a black line in the middle. the surface doesnt look gauled up. just black...


here you can see the bearing that spun. its wafer thin and material was obviously smooshed out the sides. ouch


a closer pic


this is the discolored cap. this rod i know is junked. the cap is like oil colored from heat.

 

Damm that is roasted.Any idea on what the cause was I cant remember off hand.Was it the oil pickup,pump or something?

 

Ouch. How long had you been running the motor. How did you or did you properly spec the bearing or did you guess. How did you torque you rod caps? Wrench or Rod Bolt Stretch?

 

factory bearings?

 

did you run over a patch of ice!!! My buddy did that with his 240 haha good luck though

 

motor was together for 3 months or so. First time around i never did check the clearance. my buddy told me it was a waste of time with an uncut crank. ?? this time i plastigauged all the bearings. Torqued the rods with a torque wrench to scat's specifications. It was the first time they were torqued anyway.

jeff- their acl's My other friend was trying to tell me that i needed to use hondas "select fit bearings" and use the letters on the crank or block or whatever. but no one i know with a built honda motor is using factory bearings.

i really dont know why it spun. the pan was full of oil, i was beating on it a little when it was cold. but i dont see how that would make it spin. whatever, im just getting really good at pulling my motor now

 

how many pounds were you running when you threw that bearing .........................

with your build (I read your first post of the assembly).......... the spun bearing shouldn't have happened.......... I'd LOVE to know what happened ..... I'm curious..........

that rod looks okay ...... the only reason that it has "oil marks" on it is because the bearing wasn't sealed anymore when it spun allowing oil to get up and sit on the bearing surface................

I'd, in all honest throw it back together..... run 5 -10 psi on it for a couple of days .... (NOT BEATING IT).... and see how she does............ whats the worst that can happen.......... you spin the bearing again

like you said .... your getting good at pulling the motor.....

good luck..

Lee

 

get the crank and rods resized and miced get 10 under bearings put it together good luck

 

honda cranks cannot be turned. when you spin a bearing, the crank is fucked for all performance applications. they are coated with nitride for strength, and cutting the crank takes away the coating. i was running 18-20psi when the bearing spun. i dont think it had anything to do with how much boost i was running though.

the worst thing that could happen is that i would spin a bearing again.. i dont think you know how much it cost to spin one.. next time ill have to find a new d series crank $$$ new bearings $70, new rod(s) one was $88 from scat, head gasket $40, and all the time of pulling the engine, dissassembaly and reassembaly. its quite a bitch for such a "simple" problem.