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Started By
Message
Q for old car people and mechanics here (followup from Ask a Mechanic)
Posted on 3/21/17 at 5:24 pm
Posted on 3/21/17 at 5:24 pm
1932 Buick, chronic shimmy problem, all front end replaced except steering gear.
Suggested problem (which I believe correct) was either flat spots in tires or steering gear (which has not been replaced).
Tires are ten year old tube tires. The car is a heavy car and is not driven much. Are these old enough to develop flat spots (we haven't had this problem with other cars but this one has the narrowest tires and is the heaviest). Steering gear will require a custom rebuild as the part is not available. Would you go with the tires first, or the steering gear? Would radial tires possibly help?
This has been a problem for several years. Any help would be appreciated.
Suggested problem (which I believe correct) was either flat spots in tires or steering gear (which has not been replaced).
Tires are ten year old tube tires. The car is a heavy car and is not driven much. Are these old enough to develop flat spots (we haven't had this problem with other cars but this one has the narrowest tires and is the heaviest). Steering gear will require a custom rebuild as the part is not available. Would you go with the tires first, or the steering gear? Would radial tires possibly help?
This has been a problem for several years. Any help would be appreciated.
Posted on 3/21/17 at 5:28 pm to chinhoyang
Not sure, what I do know is that if I had that car I'd find me a Bonnie and go rob some banks
Posted on 3/21/17 at 5:31 pm to FloridaMike
quote:
Not sure, what I do know is that if I had that car I'd find me a Bonnie and go rob some banks
39 Buick is a better gangster car.
Posted on 3/21/17 at 5:35 pm to chinhoyang
Does shimmy change after tire rotation?
Have front tires been balanced? Possibly a missing wheel weight.
Have front tires been balanced? Possibly a missing wheel weight.
This post was edited on 3/21/17 at 5:45 pm
Posted on 3/21/17 at 5:39 pm to chinhoyang
Usually you can see flat spots.
What about front wheel bearings? When they get loose you can get a shimmy. I'd also make sure the front end parts are set correctly. On cars a mechanic may not see very often, they may not always be dialed in just right.
What about front wheel bearings? When they get loose you can get a shimmy. I'd also make sure the front end parts are set correctly. On cars a mechanic may not see very often, they may not always be dialed in just right.
Posted on 3/21/17 at 5:41 pm to chinhoyang
quote:
ten year old tires
Bingo.
Old tires killed Paul Walker.
This post was edited on 3/21/17 at 5:42 pm
Posted on 3/21/17 at 5:48 pm to chinhoyang
Rail cars in the background...
You riding the rails again?
You riding the rails again?
Posted on 3/21/17 at 6:05 pm to Gaspergou202
quote:
Have front tires been balanced? Possibly a missing wheel weight.
They should be balanced. The shimmy starts at about 45 mph and is bad enough that the car is not driveable at that speed.
Posted on 3/21/17 at 6:11 pm to chinhoyang
I would start with the obvious which is the 10 year old ties.
Posted on 3/21/17 at 6:11 pm to chinhoyang
Can you jack it up on each corner and give it the 3-9 and 12-6 shake?
Posted on 3/21/17 at 6:50 pm to chinhoyang
quote:
They should be balanced. The shimmy starts at about 45 mph and is bad enough that the car is not driveable at that speed.
Rotate them. Quick and easy diagnosis.
Posted on 3/21/17 at 6:52 pm to chinhoyang
(no message)
This post was edited on 4/19/17 at 11:59 pm
Posted on 3/21/17 at 7:21 pm to pioneerbasketball
quote:Straight 8 motor runs very smoothly.
Does it need gas?
Posted on 3/21/17 at 7:22 pm to chinhoyang
do you mean old car people or old car people?
Posted on 3/21/17 at 7:28 pm to Gaspergou202
quote:If they have flat spots, this may not work (as all four tires will probably have flat spots) but it will find out if they are out of balance. I hope it is not the steering gear, as it is going to be a huge pain to get the work done.
Rotate them. Quick and easy diagnosis.
Posted on 3/21/17 at 7:48 pm to chinhoyang
Flat spots usually give you a thumping sensation at all speeds and usually makes noise.
Just did a quick internet search. This is from aa1car. Com:
A rotation can't hurt an it's free.
Just did a quick internet search. This is from aa1car. Com:
quote:
Symptoms of Tire Imbalance An out-of-balance tire and wheel will typically create a vibration or shake that becomes progressively worse as the vehicle speed increases. The speed at which the vibration first becomes apparent will vary depending on the size and weight of the tires and wheels, the size and weight of the vehicle, the sensitivity of the steering and suspension and the amount of imbalance, but usually starts at 40 to 50 mph and increases in intensity as the speed goes up.
A rotation can't hurt an it's free.
Posted on 3/21/17 at 7:51 pm to chinhoyang
I'm going to stick with my first assessment and say flat spots on the tires
Posted on 3/21/17 at 7:57 pm to chinhoyang
Correct, if you have flat spots then chances are all four tires have flat spots and rotating may not eliminate the problem.
I run my Gravely zero turn tire pressure low. After just one week of sitting, I can feel the flat spots when driving on the road and driveway but it goes away quickly.
I would put the car on jack stands and inflate tires to maximum rates pressure for couple of weeks. Then drop it down and take it for a quick test drive. If it is noticeably better then flat spots might be the problem and storing it on stands might be the simple solution.
Other than that I would try a well experienced alignment shop and get their opinion. Zims on Verot School Road in Lafayette would be my suggestion if you are around Lafayette.
I run my Gravely zero turn tire pressure low. After just one week of sitting, I can feel the flat spots when driving on the road and driveway but it goes away quickly.
I would put the car on jack stands and inflate tires to maximum rates pressure for couple of weeks. Then drop it down and take it for a quick test drive. If it is noticeably better then flat spots might be the problem and storing it on stands might be the simple solution.
Other than that I would try a well experienced alignment shop and get their opinion. Zims on Verot School Road in Lafayette would be my suggestion if you are around Lafayette.
Posted on 3/21/17 at 7:57 pm to meauxjeaux2
quote:
I'm going to stick with my first assessment and say flat spots on the tires
Wouldn't it have to have play somewhere?
I've had a bunch of bias ply tires that will get flat spots but unless there's play they're always drivable.
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