brake switch

We had an uncharacteristically warm Saturday just in time for me to sort out the problem with the brake caliper on the Range Rover. As you may remember I came home to find this in my driveway.

As you can imagine it was very disappointing. I knew it was behaving like a warped rotor. As I mentioned in my previous post those rotors were brand new. I got the parts in and found brake fluid at a store I normally don’t shop in, Pep Boys. Its good to know someone around here stocks Castrol LMA Dot 4 brake fluid.

As I mentioned Saturday morning came around and I pulled the Range Rover into the garage with only the hand brake to slow me down. I ordered brake calipers for the entire rear axle. I figured if one had failed the other would be near enough to fail as well. My son’s friend “Scuba” wanted to learn about brakes so I told him to come over when he was ready. I started and not long after he wandered in. He is studying mechanical engineering and would like to be a automotive designer/engineer for BMW after he graduates.

So back to the caliper. I got her jacked up and got the tire off and started looking at what might have happened. What I found was very, very disappointing.

I noticed a wear mark on the rotor.

The wear marks are only on part of the rotor. This would account for the whomp, whomp sound. So I looked at the brake caliper. The brake pad was dragging on the rotor. This is not designed to happen. So I looked at the caliper for an explanation.

The brake caliper had two distinct wear marks. With the caliper in place the brake pads were definitely rubbing on the rotor. I showed Scuba how the caliper works and we thought about the design and what might have failed. I decided to fit the new caliper and see if we had the same conditions.

With the new caliper in place we didn’t see any contact between the rotor and the pad. as I was looking at the setup I noticed something not quite right.

There was a gap between the rotor and the hub. There should not be a gap there. I examined it even more closely and noticed the hub and rotor were touching on the opposite side. But on this side they were separated.

This causes rotor to wobble and as it was rotating it was causing vibration and parts that have very tight clearances were now rubbing on each other. This caused a couple of bolts to be shaved off a bit.

I removed the hub and rotor and found even more damage. The ABS ring was also not properly attached to the rotor. That was apparent from the nyloc nuts that were not properly tightened down.

You can see everything the the following picture. How it stayed together I will never know.

It goes without saying, but I’ll say it anyway. The brake rotor was scorched and had to be replaced. The brake pads were ruined from heat. The brake caliper seal had failed and need to be replaced or refurbished. I had sourced that part but the pads and the rotor were another thing.

I went to O’Reilly’s Auto and they told me they didn’t have one in any store or in the warehouse. I went out to the parking lot and called NAPA Auto. The kid there told me they had pads and rotors in the warehouse and could have them brought to the store in Norman by Monday. The good news in this is the warehouse is in Edmond. So I called the kid back and told him I’d just drive up there (35 minutes) and pick them up myself. So I did. Ricky was fun to chat with as they pulled my parts.

I headed home and found myself on the road where my family is buried. I stopped to see the burial plot. I didn’t stay long.

I got back to the garage and started disassembling and reassembling the parts. In the reassembly I used red thread locker on the bolts that go in to the ABS ring. I used blue thread locker on EVERYTHING ELSE.

I had lost an entire quart of brake fluid. I emptied the full contents of the bottle into the reservoir. Scuba pumped the brake peddle as I bled the air out of the line and caliper. We hopped in and took her for a ride around the block. All was well.

Conclusion.
How on earth did those bolts come out? I know for sure that I tightened the bolts. I remember how I rigged up the breaker bar. I remember the reassembly. There was no thread locker on the bolts when I disassembled it. This was the main reason for not putting any on when I initially did the brake rotors.

I will definitely have the driver’s side rear off to check for assembly. If this could occur on the passenger side it could occur on the driver’s side. Better to find the problem before it destroys that side.

I have had nothing but trouble with that corner (passenger side) of the Range Rover since I did the last restoration. Was I exceptionally tired that day? Was I loco de color that day? It was exceptionally hot that summer.

Well that is all. I have a few other projects that demand attention. First and foremost is the driver’s side door handle. My son Diet Mtn Drew managed to nearly rip it off when he borrowed the the Range Rover while his Scion was in the shop. The main problem is the latch needs adjustment. I will look at that when I pull the door card and sort out the bad handle. I also have to fixed the faulty brake peddle switch.

School starts back on Tuesday. My next free time will be during Spring Break. Let’s hope nothing breaks before then.

Thanks for reading and Happy Rovering.

July 8th, 2005

There is a huge update in the works. I have started on it now twice, once yesterday, and again today, having deleted several days work. Very frustrating.

Engine
JagGuy and I have the engine in. We started on it April and finished it after three long weekends. JagGuy has all the skill necessary for a successful transplant. And it showed. He had the heads off and the engine built before I could get in the shop each weekend. He has the luxury of Fridays being fun days and he used his “fun” day for my engine. What a great friend.

With the engine swap we found several other problems. I will start listing them and I will probably forget some as there were many.

Radiator
It was indeed a head gasket problem but with that there was also a problem with the radiator. It was clogged again. We noticed that when we revved the engine the hoses would flex. Meaning there was a lot of pressure in the system. Frustrated I replaced the radiator with a new one from Atlantic British. Cooling problems vanished.

Heater Core
One of the final things to be blown by the old engine was the heater core. I have heard horror stories about getting the dash off to replace this part. I will wait for a weekend in September or October when it gets cooler to replace this. I bought the replacement core when it came up on British Pacific’s Steve’s Deal of the Day.

The wife
While I’m sure some of you were expecting me to say I was replacing my wife, I have not. She has been harrassing me lately about the costs of the BWB. Keeping a 12 year old car on the road in good working order is hard. It is harder when it was designed in a British Pub by 12 drunk engineers. But for my piece of mind and to reassure her that I was not spending the milk money for frivolous toys I pulled a report out of Quicken of all the auto repair expenses. I was surprised by the amount, surprised in a good way. She was surprised in a bad way. 2800 dollars (US) was the tally for the period since I made the final payment back in November 2004.

Not bad for all the things I’ve bought for the engine and including oil changes for both cars. She still believes with all her heart that a $450 a month car payment would be cheaper than putting parts on the paid off Rover. I have now classified the Rover as a restoration project. So the costs are easier to stomach as I am restoring a car, just like on TV!!!!

Steering seal
The morning after I got the BWB home with all the overheating problems we planned to return her to the shop in Edmond, it was a cool April morning so I figured the heating problems would be less if I went in the morning. After I pulled into the gas station to fill up I got out and noticed the long red stream of fluid leading from the street to underneath the Rover. Transmission fluid, but from where?

After a long look it was the steering box. Since ATF will burn and considering the blow back to the exhaust I drove her home defeated and disappointed. We put a seal on the next weekend.

Steering Shaft
Once again on sale at British Pacific. If you look at the steering shaft you will notice a rubber grommet there. Mine is hard as a rock and cracked. Obviously failed. Now the question begs why can’t we just replace the rubber bits. Well I bought a new shaft and will investigate if the old can be repaired when I get it off of there. Hammerin’ Dan observes that the heat from the headers is probably to blame in the rubber failing. Possibly some asbestos wrap might be in order.

Brake Switch
The ABS lights came on and with some investigation and a clever way to short the diagnostic plug I learned my brake light switch had failed. I got a replacement on sale from British Pacific’s Deal of the day. The installation was not any fun due to the location and the contortionist position you have to get in. Also my eyes don’t work that well up close and so most of the install was done while guessing on a blurry image.

Radio
The steam that escaped from the blown heater core filled the cab with nasty antifreeze steam. The radio immediately from that day forward would act like it lost power often loosing the code. Occassionaly it would not work at all. I thought sure the steam killed it. I was wrong. The ignition switch is failing. You may say, “what the hell?” Well it would be a good question.

The accessory function of the switch that powers many things like the windows and other stuff is apparently shorting out or not making connection. So among the other things the ignition switch is failing and needs some help.

Carpets
Had to clean the carpets again due to the antifreeze leak inside the cab. Due to my previous planning I did not have to remove the center console. Sweet!

Exhaust
Having spent a good three hours under the BWB during the engine project I noticed that none of the hangers were replaced the last time I had the exhaust worked on at University Muffler. That is disappointing cause I like those guys their work is just not very good. I had it in there again recently to have a torn exhaust pipe fixed. Due to the hangers being unhooked the only place the exhaust was attached had stressed the pipe to the point that the silencer at the rear was about to break off. I had them cut it off and weld on a pipe. It changed the sound some but not too bad. Well the weld for that section broke. So I took it to Discount Muffler just up the road from the office and had them put a good weld on it. It cost me 25 bucks but it’s now welded. I will come back to them to have the new cats welded in as soon as I buy them.

Category: brake switch

Brake Caliper Problem Solved (Post #282) 1/16/2012

July 8th, 2005 (Post #61)