The other night, I noticed my passenger front caliper seemed to be sticking. Yesterday, I took it apart, cleaned and greased the slides, it seemed to be ok after initial testing and the wheel spun freely. After my commute to work today, about 10 miles along highways, my ir heat gun showed about a 40-50 degree difference between right and left. What is a normal variance between sides? Is it still sticking?

 

What about piston condition? Have a helper press the brake pedal and release and see if you can notice a difference side to side

 

What was the wear on the right pads versus left?

 

Pad wear is similar side to side, I believe this issue just started and didn't go long unnoticed. Before taking everything apart yesterday, the passenger wheel showed a slight drag vs driver, both held firm when pedal hit.

 

Is the car pulling one way or the other --- under braking?

Do you have excess weight on one side of the car?

 

Nope to both. Only reason I noticed it that first night was the smell of the brakes. Since I cleaned and lubed, it still seems like it sticks, but not enough to torch the brakes. On a ten mile trip last night, the "sticking" side read 170f at the pad while the other side was around 130. Today after the same trip there was no notable difference and they were both about 155.

 

The fronts are easy and cheap to rebuild, or, buy some re-manufactured calipers on RockAuto.

While you're there, do a brake fluid swap to DOT4 and add some steel braided lines if you haven't already.

Peace of mind, especially on brakes is priceless.

 

Fortunately, I have a salvage place near me that seems to specialize in sports cars. Picked up a pair of the cleanest front calipers they had along with some rebuild kits off of Amazon. Already running ate super blue, but I'm about due for a fluid change anyway. Going to blow out the front lines with an air compressor as recommended in another thread and gravity bleed out the steel lines before hooking everything up and bleeding the calipers, as per Billman. Reasonably sure it's sticking, it's the fact that it's intermittent and not constant that bugs me.

 

I'm having the same issue, have you found a solution?

 

In my case the temperature difference was caused by bad wheel bearings, so JUST in case what you do doesn't work you know where to look next. Nissin calipers are tough and can take quite a bit of abuse.