Problem: Heavy shudder upon braking

[jrsavoie]

The vibration did not exist when the drums were initially installed. Belief is that the one locking up caused it to overheat and warp. The vibration started recently, like just before the tie rod broke which had me focused on the front.

I would still see if I could find a place that turns drums.
I've heard a lot of stories about new,bad drums and rotors.

I don't know if cheap aftermarket rotors have improved, I haven't heard any stories about them in quite a few years.
But then, nobody checks them anymore.

The last bad drums I heard of, were a few years ago.

If you find somebody to spin them, I doubt they'll charge much. Especially if they spin true.

Is there a way to put them on a hub and hand spin them, just to check. Before installing?

If they're Chinese I'd definitely check them.

 

[Will L.]

When we spoke on the phone, you were sure it was front axle chattering.
If not sure, get a line plug and seal the line for the rears. Test. Then swap plug to front and test. Doing this you will be eliminating the plugged axle from braking so keep speeds minimal.

 

[Big T]

I would still see if I could find a place that turns drums.
I've heard a lot of stories about new,bad drums and rotors.

I don't know if cheap aftermarket rotors have improved, I haven't heard any stories about them in quite a few years.
But then, nobody checks them anymore.

The last bad drums I heard of, were a few years ago.

If you find somebody to spin them, I doubt they'll charge much. Especially if they spin true.

Is there a way to put them on a hub and hand spin them, just to check. Before installing?

If they're Chinese I'd definitely check them.

Everything is Chinese these days. I did not have problems when they were originally installed, other than the left rear locking up which was due to my install error on the right rear. If this drum is out of round, I will take it back to Napa. I bought from Napa for this reason as they have a 12 month warranty and I did not incur the exhorbitant shipping cost of retail online, let alone return shipping on me.

 

[jrsavoie]

Everything is Chinese these days. I did not have problems when they were originally installed, other than the left rear locking up which was due to my install error on the right rear. If this drum is out of round, I will take it back to Napa. I bought from Napa for this reason as they have a 12 month warranty and I did not incur the exhorbitant shipping cost of retail online, let alone return shipping on me.

You'll never know if they're true, unless you spin them. I prefer to do it before installing.

 

[Big T]

You'll never know if they're true, unless you spin them. I prefer to do it before installing.

The local Napa charges $20 to turn this size drum.

 

[jrsavoie]

The local Napa charges $20 to turn this size drum.

That sounds good.

Let us know how they spin.

 

[Big T]

That sounds good.

Let us know how they spin.

I will first try the new drum as is. If it does not cure the problem, then I will order a second drum for the other side. If that does not cure the problem, I will have them turned.

Realize that my installation error caused the overheat problem and resultant warping. It was never there from the manufacturer. This developed over time.

 

[jrsavoie]

I will first try the new drum as is. If it does not cure the problem, then I will order a second drum for the other side. If that does not cure the problem, I will have them turned.

Realize that my installation error caused the overheat problem and resultant warping. It was never there from the manufacturer. This developed over time.

To me. The $20 once and done is worth it.

 

[jrsavoie]

I will first try the new drum as is. If it does not cure the problem, then I will order a second drum for the other side. If that does not cure the problem, I will have them turned.

Realize that my installation error caused the overheat problem and resultant warping. It was never there from the manufacturer. This developed over time.

Was the first drum exchanged?

Did you check to see if it could be turned?

Sometimes things aren't right, but they aren't bad enough to cause an immediate issue.
Kind of like having a new injector that's dripping a little. It's not right, but it may not be noticeable

 

[Big T]

To me. The $20 once and done is worth it.

I sense that you are fixated on this. To me it is not hard to pull a drum.

Was the first drum exchanged?

Did you check to see if it could be turned?

Sometimes things aren't right, but they aren't bad enough to cause an immediate issue.
Kind of like having a new injector that's dripping a little. It's not right, but it may not be noticeable

I kept the first drum. Since it presumably warped due to overheat, I was not sure about turning it. With rotors, I never turn them because the “warped” area is from an increase in hardness of the metal due to heat. You can turn it down, but it returns because the wear in the affected area is less. I am assuming this also pertains to warped drums, but I still have the original.

 

[jrsavoie]

I sense that you are fixated on this. To me it is not hard to pull a drum.

I kept the first drum. Since it presumably warped due to overheat, I was not sure about turning it. With rotors, I never turn them because the “warped” area is from an increase in hardness of the metal due to heat. You can turn it down, but it returns because the wear in the affected area is less. I am assuming this also pertains to warped drums, but I still have the original.

To me, these days, I can't pull a drum or do much of anything else.

There never was a time, when I had time, to do things twice, if it could be avoided.

Things like testing injectors and stuff before installing, to have a better chance of never having to touch it again.

Back then I was working a lot of 7 day weeks. Anywhere from 8 to 26 hours a day. Keeping up with all of the vehicles was impossible.

 

[Big T]

To me, these days, I can't pull a drum or do much of anything else.

There never was a time, when I had time, to do things twice, if it could be avoided.

Things like testing injectors and stuff before installing, to have a better chance of never having to touch it again.

Back then I was working a lot of 7 day weeks. Anywhere from 8 to 26 hours a day. Keeping up with all of the vehicles was impossible.

I’m having two sets of Bosch India injectors tested by Bill Heath. He will pull apart at least one to inspect for CKO indicators.

As for the brake drums, I will know fairly quickly if the new one cured the issue. I have an incremental plan of attack for this issue and I’m working to it.