Harmonic balancer?
- Thread starter 86GT
- Start date
So your car vibrates when it's in neutral? Could it be the motor mounts? Mine has been vibrating after 2800 rpm's when I'm driving it, but when in neutral, I can rev it up to my heart's content. I asked this on another forum and a few ppl said it could be the input shaft, retainer, or input shaft bearing. :idk: But I definitely need to fix it in the spring.
Well yes. But the 1st post just says above 3000 rpms. Now we don't know if he is just sitting still and reving the motor. Or is he driving the car above 100 mph and getting it to shake.
It's just something else to look out for. And snce he never answered you ? about being in neutral. And he says he changed the Balancer and nothing changed. The only other thing that I can think of is that the flywheel is wrapped or the clutch unit is wrapped. And if it is non of those then he would have to take the whole motor apart and could be something in the rotating assembly. Sorry if my speeling is bad today I got a really bad migraine right now. i can barley see the screen.
Last edited:
ok so this is whats going on to make everything clear when im in neutral and rev it past 3k vibrates like crazy and driving wise also past 70-75 vibrates so much it feels like all the bolts on da car are about to come loose so i changed tranny flywheel bellhousing motor mounts balancer..and still nothing...i was told the only thing we have left to do is open up the motor and look at the crank
I would definitely check to make sure your wheels are balanced properly like jkstang said, does your steering wheel shake when you get over 70 mph? And yes if you haven't found why its vibrating there's a good chance that it's something internal. Also with the shaking are your tie rod ends in good shape?
Got me thinking now that we got some info. So reving past 3k in neutral the motor shakes. So I think it is safe to say the it won't be wheel out of balance. Safe also to say that it is not the driveshaft. Since your not moving the driveshaft is not moving also.
You changed the Balancer, Flywheel, ? Did you change the balancer and flywheel yourself. Or did a shop do it. Where they New parts or used parts also? It is possiable that one of those 2 parts has the wrong counter weight. There are 2 weights a 50oz, and 28oz. If one end has a 50oz and the other end has a 28 oz. That will make an issue. A stock motor I think is 50oz on both end's
Now if both are correct OZ's Then let's look at the motor. You have the crank and rods that rotate. Pistons run up and down. You have the cam which roates in the middle of motor. Then you have all the push rods, lifters, and rocker arms, These are the only parts that rotate or move up and down that could affect rpms if they are wrapped and will make the motor shake.
Last edited:
Good idea I didn't even think about that. It's always hard to tell when you don't have the car in front of you. But Michael does have a good point. When was the last time you changed the wires plugs cap and rotor. Maybe the coil is going bad also. What shop did the work? if you don't mind me asking. Don't have the motor taken apart yet untill we have tried to figure out all the easy stuff first.