Brake Noise
Verified during road test that problem is in the brake. If the problem is cause by the brakes, pay attention to the type of noise and let that lead to the source of problem.
Brake pads wear sensors are designed to make high-picthed squeal when the pads are worn.
Other causes could be the rotor rubbing against the splash shield or that something has become wedged between the rotor and another part of vehicle. Noise may also be caused by failure to install all of the hardware when replacing a caliper or brake pads.
Sometimes the driver might notice there is strange noise coming out from the wheel when brakes are apply that's cause by rusty mechanism even the rotor itself having score marks or cracks, steering wheel vibration will be perceive at the same time.
Other sources of noise include the pads themselves. Depending on the lining materials, some pads are more prone to make noise. These noise can be like a light wire brush against metal sound, grinding or high-pitched squeal depending on the pad. Particularly the racing pads that use the different lining materials compare to normal brake pads, the racing pads are prone to make noise during braking.
Speaking of pad itself, this has been annoyed my parents for few months, eventually I got inspected and replaced when I got home after my final examination.
Photo above showing the cracking lining and uneven wear, this problem can be eliminate by using sand paper to remove the imperfection surfaces or simply replace a set of new brake pads. Be sure to inspect the brake rotor or spinning mechanism if it is brake shoes, the brake caliper piston, sliding pin and hoses. Brake lining uneven wear mostly causes by the worn rotor surface or simply the low grade brake lining itself, improper installation is rare case. Imbalance wear cause by the uneven pressure for example the clogged brake line(hose) and jammed caliper piston. When brake system service is on going the correct SOP and brake fluid should be use. Noted: Do not mixed the silicon base DOT5 with other grade of fluid. DOT4 is the most common highest grade selection available for legal road vehicle.
Let’s conclude this topic by talking about off road vehicle like 4x4 or pick up. This is common for pick up truck of having this kind of problem particularly after the off road racing event. Due to the extreme road condition the suspension system may have issue after the “abused”, other than the tires, the unsprung weight mechanism, brake pads and rotor itself is badly worn out cause by the mud, sand and tiny rock will stuck between them and create huge amount of unnecessary friction, however, they will replace all the worn out component to prevent any kind of mechanical failure.
Brake pads wear sensors are designed to make high-picthed squeal when the pads are worn.
Other causes could be the rotor rubbing against the splash shield or that something has become wedged between the rotor and another part of vehicle. Noise may also be caused by failure to install all of the hardware when replacing a caliper or brake pads.
Sometimes the driver might notice there is strange noise coming out from the wheel when brakes are apply that's cause by rusty mechanism even the rotor itself having score marks or cracks, steering wheel vibration will be perceive at the same time.
Other sources of noise include the pads themselves. Depending on the lining materials, some pads are more prone to make noise. These noise can be like a light wire brush against metal sound, grinding or high-pitched squeal depending on the pad. Particularly the racing pads that use the different lining materials compare to normal brake pads, the racing pads are prone to make noise during braking.
Speaking of pad itself, this has been annoyed my parents for few months, eventually I got inspected and replaced when I got home after my final examination.
Photo above showing the cracking lining and uneven wear, this problem can be eliminate by using sand paper to remove the imperfection surfaces or simply replace a set of new brake pads. Be sure to inspect the brake rotor or spinning mechanism if it is brake shoes, the brake caliper piston, sliding pin and hoses. Brake lining uneven wear mostly causes by the worn rotor surface or simply the low grade brake lining itself, improper installation is rare case. Imbalance wear cause by the uneven pressure for example the clogged brake line(hose) and jammed caliper piston. When brake system service is on going the correct SOP and brake fluid should be use. Noted: Do not mixed the silicon base DOT5 with other grade of fluid. DOT4 is the most common highest grade selection available for legal road vehicle.
Let’s conclude this topic by talking about off road vehicle like 4x4 or pick up. This is common for pick up truck of having this kind of problem particularly after the off road racing event. Due to the extreme road condition the suspension system may have issue after the “abused”, other than the tires, the unsprung weight mechanism, brake pads and rotor itself is badly worn out cause by the mud, sand and tiny rock will stuck between them and create huge amount of unnecessary friction, however, they will replace all the worn out component to prevent any kind of mechanical failure.
HY510, K4-PRO & K5-PRO Thermal Comparison
HY510, K4-PRO &
K5-PRO Thermal Comparison
In today
article I will discuss 2 different brand of thermal paste I bought, their claimed
performance and product property, finally my test bench result and final
conclusion. Before I started the science experiment, I have to say I totally
regret to purchase the “K” series product and I will tell you why in the following
paragraph.
2 different thermal paste I purchased at the different time, both
purchased on ebay and their shipping and delivery time around 30days arrived my
door with the good packaging. The product property and thermal conductive
performance of K series thermal paste is mention on their website. K4-PRO has thermal conductivity K>4.6 W/m.K and K5-PRO has thermal conductivity K>5.3 W/m.K both are no electrical conductivity,
they also claimed the thermal conductivity is 3 times higher than common
thermal pastes and pads.
http://www.computer-systems.gr/content/product/k5-pro-k4-pro-set
http://www.computer-systems.gr/content/product/k5-pro-k4-pro-set
 |
| http://www.computer-systems.gr/content/product/k5-pro-k4-pro-set |
Product property stated at ebay as well. http://www.ebay.co.uk/itm/HY510-30g-Grey-Thermal-Conductive-Grease-Paste-For-CPU-GPU-Chipset-Cooling-UK-/192120683326?hash=item2cbb48fb3e:g:4ccAAOSwCU1Yu3NT
After I introduced the product information,
this is the test bench information I should give for better reference. CPU = E2140
1.6GHz, stock heatsink crew mounted method. Motherboard = Gigabyte G31M-S2L. RAM
= 1GB 667MHz. No PCIe and No PCI in use.
Started the testing at room temperature
around 28-29°C with well air flow condition during summer night. Stress tested
the CPU by using HeavyLoad application to run about 10minutes for each test.
First, without unscrew anything on my test bench, the current thermal paste at
the time was HY510, so I ran HeavyLoad at the first time, ended my first test
of HY510 = 63°C.
Unscrewed the CPU heatsink, had a looked at
the CPU and heatsink surface, the paste was spread out very well covered,
greasy and easy to remove thanks to its silicon based. I cleaned up everything
by using Polylab contains alcohol 95%.
Second test, I applied K4-Pro to the CPU, ran
the same test again. Ended my second test of K4-Pro = 69°C.
Unscrewed the CPU heatsink, had a looked at
the CPU and heatsink surface, the paste was spread out very well covered and
this time it was so thin thanks to the low viscosity but harder. After that I cleaned
up everything by using Polylab contains alcohol 95%.
Test No.3, I applied K5-Pro to the CPU, ran
the same test again. Ended my test of K5-Pro = 72°C.
Unscrewed the CPU heatsink, had a looked at
the CPU and heatsink surface, the paste was spread out very well covered but it
was thick due to the high viscosity for thermal pad replacement and it is
harder than HY510 as well. After that I cleaned up everything by using Polylab contains
alcohol 95%.
Finally, I ended up with all the disappointment.
So, why am I
regret? I paid another RM40 for a lower performance item! I spent 1.5 hour for
this experiment just to make sure if there was other factor cause the
unsatisfied result, in these tests, the HY510 the lower cost item completely
stand out. Why HY510 has lower thermal conductivity than K4 and K5 but has a
better performance?
So why HY510
has lower thermal conductivity than K4 and K5 but has a better performance?
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