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Lock washers on brake caliper bracket bolts???

Tecnico said:
I beg to differ, the NASA engineer knows exactly what he is saying. The split lock washer is useless as an aid to keeping the clamping load from reducing due to the bolt backing off which is what most uninformed “experts” think a lock washer is used for.
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Nonsense, lock washers have been used for over a 100 yrs in machinery of every kind, they weren't used because they didn't work. All those manufacturers are wrong and you and the twit from NASA are right?
Give your head shake.
 
skippyelwell said:
Nonsense, lock washers have been used for over a 100 yrs in machinery of every kind, they weren't used because they didn't work. All those manufacturers are wrong and you and the twit from NASA are right?
Give your head shake.
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No need to get personal.

I stand behind the tests in the video, you can see the performance with your own eyes.

D 😎
 
Tecnico said:
Never credit design intent for silly things you find, often it’s because of influence of the bean counters!
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Welllll.... I know it's always popular for "us guys" to say stuff like that about "doze guys", but a reasonable squint will push back and tell you to design it for (or find) an available bolt instead of making him add another inventory line item and another assembly requirement, because both add to cost.
 
Stock, just torque to spec, never an issue.

I put Wilwood racing brakes on the Mustang (disks all around), bolts have provisions for wire locking. Even with the coldest pads they needed a little bit of heat in to really work, but very effective once warm.

My neighbour has a collection of sport cars including a few Porsche and the newest one has the largest rotors I have ever seen on a car, must be 17”+ I would like to test the brakes on that monster. Seems entirely overkill with street tires, but on a hot day with slicks on a high speed track they would get the job done. Brake fade is a scary thing if you have ever experienced it.
 
someidiot said:
Welllll.... I know it's always popular for "us guys" to say stuff like that about "doze guys", but a reasonable squint will push back and tell you to design it for (or find) an available bolt instead of making him add another inventory line item and another assembly requirement, because both add to cost.
Click to expand...

Yeah, it’s easy to point to the other guy. There’s always a trade off between design & cost including the logistical side like you mention. In the end, cost is usually king as long as it meets spec. If it were easy somebody would have done it already!

D 😎
 
slow-poke said:
Stock, just torque to spec, never an issue.

I put Wilwood racing brakes on the Mustang (disks all around), bolts have provisions for wire locking. Even with the coldest pads they needed a little bit of heat in to really work, but very effective once warm.

My neighbour has a collection of sport cars including a few Porsche and the newest one has the largest rotors I have ever seen on a car, must be 17”+ I would like to test the brakes on that monster. Seems entirely overkill with street tires, but on a hot day with slicks on a high speed track they would get the job done. Brake fade is a scary thing if you have ever experienced it.
Click to expand...

I can confirm, the Porsche brakes, across the line up (I've driven most of their models), are incredible. On warm tires on a dry sunny day, the amount of brake force before ABS is absurd, the tires are definitely the limiting factor. Those giant carbon ceramics will just keep doing that same thing stop after stop, but even with aggressive driving, I've never felt an ounce of brake fade on my Macan GTS even on standard steel brakes.
 
Tecnico said:
Oops!

The Brembo set I put on my VW last time came with a new set, no such luck with the Hyundai?

D 😎
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I made sure I had new hardware when I ordered the pads. Just surprised that the previous installer missed it. As did the mechanic who inspected the vehicle before it was purchased.


And yet another twist in the REAR brake caliper bracket bolt saga... The ones I ordered from the dealer that are so hard to find, only 5 in inventory across Canada, expensive, that turned out to be exactly the same size as the front bolts...wrong size. Rear brake caliper bracket bolts are the same length as the front and they come with the mystery lock washer not found in any parts diagram. BUT they are M10 x 1.25 not M12 x 1.25 like the front.

Here's a neat fact about this Hyundai dealership where the bolts were sourced from. I have ordered parts through them twice in 2 years and twice in 2 years it was expensive, incorrect, and returned. What I can say in the positive is that they are consistent.🙂
 
Have to give credit to the dealership parts person. After giving him the details of the bolt size issue he gave me a full refund even though it was past 30 days and no restocking fee. Then he searched for the part while we talked. Couldn't find it. He was surprised. What he did find was the lock washer in a diagram in a seperate system that mechanics use. Great guy.
 
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