acador Posted October 5, 2011 Share #1 Posted October 5, 2011 I hesitate to even ask this question because I probably know the answer and will be razed for being cheap, but here goes. I recently obtained a slightly used euro balancer with the upgraded 35mm bolt and washer. I installed the balancer and noticed it has a very slight wobble to it. At 1200 RPMs it looks perfect but at 800 it appears to be a bit off. The engine feels smooth when driving. Here are my questions:1. Could this be within the tolerance or should it appear to spin absolutely perfectly?2. Will temporarily running this pulley cause imminent damage to the rotating assembly?The main reason I ask is I plan on taking the car to the drag strip an hour from my house with some friends next weekend and I don't have the time to get install another pulley but I really want to run it. The car is probably driven less than 1000 miles a year but they are usually hard miles. I’d like the engine to last a few more thousand miles until I can put together a stroker. Link to comment Share on other sites More sharing options...
John Coffey Posted October 5, 2011 Share #2 Posted October 5, 2011 Sounds like its been installed incorrectly. Wobble is bad. Link to comment Share on other sites More sharing options...
jmortensen Posted October 5, 2011 Share #3 Posted October 5, 2011 I've had a balancer wobble before on my car. I ran it up past 7500 rpms at the track (slight case of red mist trying to pass a friend), the balancer came apart and the crank bolt loosened. I torqued the bolt back down and drove home from the track. Pulled the balancer and found that the woodruff key had broken out of the crank and the damage to the crank was pretty significant. I probably could have swapped the crank out but I built a whole new bottom end. If you pull yours and there isn't any damage, I'd go get another balancer. Link to comment Share on other sites More sharing options...
acador Posted October 6, 2011 Author Share #4 Posted October 6, 2011 Sounds like its been installed incorrectly. Wobble is bad.I replaced the key, and bolted it down making sure it lined up properly, and then torqued it down to 100ft lbs. It appears to be fully seated on the snout and the belt is strait. Is there a different procedure I should have used? The inside of pulley and the bolt don't seem to wobble, only the outside section wobbles a slight bit. I will replace the balancer next month I just don't have time to do before the races. Link to comment Share on other sites More sharing options...
acador Posted October 12, 2011 Author Share #5 Posted October 12, 2011 I pulled the balancer off to inspect it and I don't see anything wrong with it. I have a new one on the way but I did some test fitting on the original to see if I can find an installation issue. Should the front of the balancer center section be flush with the end of the crank? Can someone measure the distance between the blancer and timing chain cover seal using a feeler gauage on their Z? The belt looks straight but i'm concerned the balancer isnt getting fully seated. I can't find the specs in the FSM or other to verify. Link to comment Share on other sites More sharing options...
acador Posted October 16, 2011 Author Share #6 Posted October 16, 2011 I got the new MSA balancer installed yesterday and it's wobble free. The bad balancer and the new balancer look the exact same. I guess you can't always tell the condition of one just by looking. Link to comment Share on other sites More sharing options...
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