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View Full Version : Sr20 Crank Pulley Wobble - Normal?


GripSpec
01-23-2013, 12:38 PM
While performing some regular maintenance last weekend, I noticed that my crank pulley exhibits a noticeable "wobble" at idle. Here is a summary of what I see, and I'd like to get some opinions:

-The SR crank pulley is made up of three separate "pulleys"
-The pulley farthest from the motor that powers the power steering pump looks completely straight and true, while the 2 pulleys closest to the motor exhibit a wobble.
-I am not running a/c (like most SR owners) so the center pulley is not connected to a belt.


I am wondering if this wobble is created by the fact that there is no a/c belt present. As I said, the movement is noticeable in both the ac pulley, and the water pump/ alternator pulley. However, the end of the pulley that runs the PS belt looks completely tight and staight. Very confusing.


So, this leads to my question: how big of an issue is this? Is this common on SR's because of the lack of A/c belt putting pressure on the center pulley, or is this a big problem? I worry that this constant wobble could start to wear down my bearings/crank. Any thoughts on this?

Thanks for your input!

RZRSHARP_240SX
01-23-2013, 01:18 PM
have you had the crank shaft pulley off before. it may not be torqued to spec and may be loose.

GripSpec
01-23-2013, 07:00 PM
Nope, I've never had the pulley off before. If that was the case I feel like the whole pulley (including the outermost portion) would be off balance as well.

bc.
01-23-2013, 07:23 PM
I have mine off while building my motor and replacing it with an ATI unit. I could do some measurements or something for you if you want. If there is a problem with yours I could sell you mine for a good price also.