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Help please.

624 views 5 replies 3 participants last post by  brontosaurus 
#1 ·
Alright everyone, I recently bought a 1992 Miata with 109k on it, and made a silly mistake by not throughly checking everything. I figured since it was a 92 it was completely exempt from the crank pulley wobble problem, since it's long nose and all. But..........I have it, I think at least.

The crank pulley definitely seems to be wobbling in a left to right motion. When the engine is cold it doesn't look like it wobbles at first, it seems to take about 1-1.5 minutes to start wobbling. I tried taking a video of it, but you can't really see it in the video, so it was no use. The Pulley bolt in the middle seems to be fine, as in it doesn't seem to be wobbling, it's more so the pulley around the bolt.

So do you all think I have the long nose problem or something may have flown up and hit the pulley like a rock or something? Could I just get a new pulley and that would fix it? Is it safe to keep driving like this? Thank you all for your help, I appreciate it a lot.
 
#2 ·
If you have a 1992 with original motor you shouldn't have an issue. Is there a chance that the pulley is dirty and just appears to be wobbling? Are you down on power? I think there's a test you can do if you car is stock. Put it in 5th and accelerate between 40-60. Should take about 13 seconds IIRC
 
#3 ·
Thank you, as far as I know it is the original motor, I mean it has 109k on I don't see why not. But I will do the test, it seems fine on power to me. It's definitely got a little bit of wobble to it for sure, it's not an illusion. The car feels fine, just wondering if there is something I should do to prevent something bad from happening if that is the case. This is the article that's worrying me a little bit http://www.miata.net/garage/LongNoseRepair/index.html .
 
#4 ·
There are 4 small 10mm headed bolts around the large crank bolt that could be coming loose. Also, check your accessory belts. A loose belt can cause the pulley to look like it wobbles a little.
 
#5 ·
Bingo, this is what i bet it is. Before I even read this I went down and just studied it while it idled for a while. I noticed my PS/a/c belt seemed to wobbling more then the pulley, it could quite possibly be an illusion after all, thanks a lot guys, i feel dumb for not looking closer and harder before asking.
 
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