Spenser

WTF does that mean when someone has spun a bearing?, like a Rod bearing or something?

What causes it, and how do you prevent it?


Also, what tends to kill a turbo charged honda motor other then fuel managment(or lack ther-of) and too much boost?

SpeedyJAY

The rod bearing right its a little half cylinder looking thing that your crank spins around on....

Well it "spins" around with the crank due to too much friction. Mangles up the bearing and the crank surface, so that the crank has to be machined and balanced.

Causes: Friction...from lack of oil/too much heat/improper bearing size/not breaking in a new engine properly/ not using assembly lube when rebuilding

Reddy

With a good A/F ratio and proper timing a turbo Honda motor is just as reliable as a N/A motor. However, there is a limit to how much stress stock parts can take, this is where too much boost comes into play and kills motors. People tend to think turbos blow motors well thats not true. Idiots kill motors, not turbos.


Spun bearing = you rod bearings went bad.

Spenser

So what your saying is the bearing is stationary, while the crank/rod spins around inside it? and when you "spin" a bearing, the bearing turns with rod/crank?

DraginX

The bearing basically melts or breaks apart when you "spin" a bearing. Thus it leaves a gap in between the rod and the crank which in turn the rod basically beats up and down on the crank making it knock like a ****...

Spenser

ok, well I hope I don't spin a bearing when I turbo my ZC, thanks guys.,

88crxSi

nah the bearings are fine. It's not a common problem from boosting the motors. what you want to avoid is detonation (aka knock or pinging).

projekteg

which will just melt your pistons, but your bearins will still be o.k. bearing failure mostly comes from a poorly maintained engine. if the engine is clean and was kept up good all it's life and is continued to, the bearings shouldn't be a problem.

Paperchase013

when u spin a bearing its usually a case where the bearings get chewed up and oil doesnt flow through them properly so there is a lot of friction created. the situtation will continue to get worst until the motor throws a rod out the front or back of the block. (usually #2 or #3) sometimes the bearing will wear down so much that it will actually spin arouund and sit on top the other bearing. change your oil regularly and make sure to keep all debris out when replacing the oil pan on the motor and you should be good to go.

88crxSi

or do what it did in my friends z24, crack the crank in two.