1999 Dodge Caravan vibrating

Tiny
SPEED3961
  • MEMBER
  • 1999 DODGE CARAVAN
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES


http://www.2carpros.com/forum/automotive_pictures/387517_Im000117a_1.jpg




car vibrates bad and smells like something is burning and smokes from the front end. then it goes away for a few days and the come back. no idea
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Saturday, July 25th, 2009 AT 11:07 AM

23 Replies

Tiny
BUDDYCRAIGG
  • EXPERT
First thing to do is the next time it start smoking, you open the hood and visually inspect for the cause.

Smoke is a bad thing, you could be driving a fireball waiting to happen.
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Saturday, July 25th, 2009 AT 11:59 PM
Tiny
SPEED3961
  • MEMBER
I did that cant find anything
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Sunday, July 26th, 2009 AT 8:42 AM
Tiny
BUDDYCRAIGG
  • EXPERT
What does the smoke smell like?
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Sunday, July 26th, 2009 AT 5:42 PM
Tiny
SPEED3961
  • MEMBER
It almost smells like brakes. But what is strange it only happends when the car gets hot. Then when the car gets cool its stops. If the caliper was no good would this happen.
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Sunday, July 26th, 2009 AT 6:18 PM
Tiny
BUDDYCRAIGG
  • EXPERT
Next time you smell it, get out and put your hand on the both front wheels close to the center, they will be slightly uncomfortable to touch, but you should be able to stand it.

If it's too hot to be able to keep your hand there for 10 seconds, then your brake is most likely dragging.

If you have plastic hubcaps, you will have to remove them.
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Sunday, July 26th, 2009 AT 6:29 PM
Tiny
SPEED3961
  • MEMBER
I burned my hand. I just changed the master cylinder about a month ago would that have anything to do with it. They both were buring hot could they both go at the same time.
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Monday, July 27th, 2009 AT 10:30 AM
Tiny
BUDDYCRAIGG
  • EXPERT
Since you did change it, it is possible, but not very likely.

The 3 more common problems that keep the calipers from releasing are.

The hoses are bad on the inside and acting like a check valve keeping hydraulic pressure in the caliper.

The piston seal in the caliper is worn out and not helping to pull the piston back into the caliper.

The caliper can not slide freely.
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Monday, July 27th, 2009 AT 10:56 AM
Tiny
SPEED3961
  • MEMBER
I checked the calipers and my wife put her foot on the brake and I can see the piston retract. Its when the car gets hot u can feel the car being pulled. The brakes are frezing after it gets hot.
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Monday, July 27th, 2009 AT 11:41 AM
Tiny
BUDDYCRAIGG
  • EXPERT
I've never heard of such, that's a new one on me.
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Monday, July 27th, 2009 AT 12:08 PM
Tiny
BUDDYCRAIGG
  • EXPERT
Ok, I have a shot in the dark idea.

If you have the master cylinder too full of fluid,
and when the engine gets hot, it is causing thermal expansion of the brake fluid, then the fluid doesn't have any place to go, and creates pressure in the calipers.

That's all I can think of.
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Monday, July 27th, 2009 AT 12:27 PM
Tiny
SPEED3961
  • MEMBER
How about the master cylinder. Because when the car is running the master is under presure. Maybe the valve is no good and not letting the fluid back into the master.
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Monday, July 27th, 2009 AT 1:03 PM
Tiny
BUDDYCRAIGG
  • EXPERT
I've never seen a master cylinder fail in such a way.
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Monday, July 27th, 2009 AT 2:02 PM
Tiny
SPEED3961
  • MEMBER
When the car is off the piston goes back in and when the car is on the piston doesnt go back in.
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Monday, July 27th, 2009 AT 2:19 PM
Tiny
BUDDYCRAIGG
  • EXPERT
Try one thing for me and i'll maybe buy into the idea.

While the calipers are released, start the engine, but do not touch the brake pedal.
Check the calipers to see if they tightened up on the rotors
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Monday, July 27th, 2009 AT 3:05 PM
Tiny
SPEED3961
  • MEMBER
Ok I jacked up the front end with the car off both wheels spin put on the brakes both wheels are locked. Took foot off brake and both wheels spin put foot on brake took foot off brake driver side wheel spins pasanger side is locked.
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Tuesday, July 28th, 2009 AT 8:25 AM
Tiny
SPEED3961
  • MEMBER
Forgot to tell u when I started the car in last reply sorry.

Ok I jacked up the front end with the car off both wheels spin put on the brakes both wheels are locked. Took foot off brake and both wheels spin. Start car put foot on brake took foot off brake driver side wheel spins pasanger side is locked.
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Tuesday, July 28th, 2009 AT 8:27 AM
Tiny
BUDDYCRAIGG
  • EXPERT
Well I didn't want you to step on the brakes when you started the engine.

From what you just said, i'm saying it's a problem with the hose or caliper on the right side.
I give it 80% chance of being the hose.
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Tuesday, July 28th, 2009 AT 9:34 AM
Tiny
SPEED3961
  • MEMBER
I just noticed that the rubber seal inside the cap for the master cylinder doubled in size its the second time in a month this happened and I was told the fluid is contaminated how does this happen and can it be true. That would be the reason the why my hose is no good.
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Tuesday, July 28th, 2009 AT 2:12 PM
Tiny
ABOUT2POP
  • MEMBER
I had to change mine out a few month ago because tran. Fluid was put in there instead of brake fluid. The brake fluid causes all the seals and anything rubber like the hoses to swell. I was told I would have to have everything in my brake system replaced. If you have ABS that's going to cost a lot of money to get fixed.

I couldn't afford that kind of fix. This is what I did. I replaced the master c. And added new fluid. As I went around to bleed the brakes I looked at the fluid coming out. If it was red I figured I would have to replace that sides brake related parts. My brakes work GREAT now with only replacing the master c.

My fluid was contaminated for 4 months and only (to my knowledge, which isn't much) caused damage to the master c. No matter what you're going to have to replace it and from what you're saying the hoses as well. Maybe the entire braking system.

Sorry for the story, I'm a pregnant woman :)
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Tuesday, July 28th, 2009 AT 5:35 PM
Tiny
BUDDYCRAIGG
  • EXPERT
EEK!

Now we see what's going on.

As a mechanic, for safety reasons, I have to tell you that every rubber part in the system needs to be replaced. And the system completely flushed with new fluid.
I've delt with this problem a few times.

I had to replace the maser cylinder,

the font hoses,

I normally try to rebuild the calipers myself with a new seal kits if they are a lot less that a rebuild caliper from the store (and I never trust rebuilt parts anyway)

the rear hose, (or hoses)

and slave cylinders or calipers.

So far, I have not had to replace the ABS unit, but it is a possibility that it could fail at a later date.

What you do will be your own decision. But I will tell you a bedtime story.

Customer comes in.
Accidentally put power steering fluid in. And the master cylinder had failed,
I tell them that they need to replace everything, But since I'm just a dumb mechanic and don't know anything, he insists that we only do the master cylinder.
We refuse and he takes his car, saying that he'll do it himself.

About 2 months later it comes back on a flatbed.
One of the rear wheels was locked up and had a flat spot on the tire.
(a flat spot is where the tread is worn away, and the tire is no longer round)

I noticed the car, and requested that the writer assign it to me.

We pull it in with a floor jack under the locked up wheel and I start checking things out.
The master cylinder was new
the front hoses were new
the front calipers were new
and now the right rear caliper was locked up.

I'm betting that he was replacing one piece at a time as each one slowly failed.

So I got to replaced everything this time,
and he had to buy a new tire as well.

The service writer "played dumb" when the guy came to pick it up and asked what happened.

The guy said the wheel just locked up while he was on the outer road, (that's a 45mph zone).
It could have happened on the highway.

You are driving a minivan, so i'm going to assume you have kids.

Do what you think is best.
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Tuesday, July 28th, 2009 AT 7:27 PM

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