Sometimes When I am driving my brake pedal makes a small squeak after I release the pedal ( Take my foot off the brakes ) The sound is coming from inside the car on the pedal arm it sounds like Its like the pedal arm needs a bit of grease or something ? I sprayed some WD40 all up in there , but it still squeeks I tested the pedal with the car stationary ,turned off & it does not seem to make the noise There is nothing wrong with the brakes etc Anyone else had this problem or any ideas, ? Thanks! Greg ( OldRedZed )
Grease is better than WD40 for the clevis pin Most of the time when squeaking occurs inside the cabin its due to the clevis pin or plastic stopper being deformed - check them for serviceability and replace if necessary Doesn't quite make sense that it doesn't squeak when not going....but the increase vibration from the vacuum and sonic vibration of the engine can make it worse when going - obviously Also use a plastic friendly silicon grease instead of WD40 when it comes to the clevis pin and plastic stopper Most squeaking is from metal rubbing on plastic and hence the clevis pin and stopper are generally the culprits Hope that helps solve the problem JC
Yeah Ditto on the not noisy when stopped... I was going to suggest the pedal box as my clutch pedal does this and will keep doing it until i rip the dash out (re-upholstering next year) and get the pedal box out & welded but yours sounds like a slightly different symptom?
Thanks, I will check the clevis pin, & see how I go Is there much work in replacing one if mine is stuffed ? Greg
The other potential area for this problem is the return springs on the pedals(Clutch & Brake). A small amount of oil(or grease)generally fixes it for a time.:zlove:
Thanks Again for everyones help , I Really appreciate it My car is an NA Aus Spec Automatic Is the Brake Pedal different with manuals , Imports , TT models etc ? I could not see the return spring , Forgive my ignorance , I had never heard of a clevis spring before until I made this post After testing it more, It does squeak when the car is stationary turned off, Just no where near as much as it is when running I am going off pics from this website below http://www.partsbase.org/nissan/300zx-z32-us-cal-c-vg30d-2s-gl-at-brake-brake-clutch-pedal-p-3/ I may have to take it to a mechanic & see if they can fix it if the grease does not work I am assuming this is the clevis pin ( Circled below ) ? What is inside this Black Rubber ( Circled Below ) ? Is the Return spring inside here ( Circled Below ) Thanks! Greg ( OldRedZed )
Can of silicon grease will help a lot! Hey Greg Yes - the first shot shows the clevis pin - easy to replace! But you need both a new pin and new plastic stopper when replacing them - you can always pull it apart apply plenty of grease then put it back in - if the squeaking stops - then you need to replace them with new ones and apply silicon grease (it doesn't affect the plastic) 2nd picture - inside the black rubber is the master cylinder - it is connected to a shaft that contains the piston that runs through to the master cylinder - it is possible it can squeak (hence why grease is applied when assembling) but rare as the brake fluid normally provides enough lubricant The return spring is not pictured - it is at the very top almost directly above the pedal ! Bloody hard to locate and bloody hard to see from the bottom looking up - check the tech section and look at the manual - it shows a schematic of the brake pedal and this will show you where it is! - because as I said its bloody hard to find - springs tend to squeak more when stationary than when going, as the vibration normally reduces it to more of a sonic low frequency vibration so I think you will find its the clevis pin or the master cylinder piston - but it can be the spring as Chili stated so to make sure its not the spring, get a can of silicon spray with a straw fitting on the end and then you should be able to reach up and spray it after locating it with the schematic - can of silicon grease / or lanolin grease will be your friend here - you should know very shortly - worst case is that its your master cylinder - but normally they leak more so than squeak - so I still think its your clevis pin - wont take long to find out though! You wont need a mechanic unless its your master cylinder (which you can still do by yourself if your inclined) Just remember that most squeaking is from plastic rubbing on metal! Springs can be the exception due to a build up of surface tension such as a coating of rust (i.e. lack of lubrication) but vibration from the motor will tend to make them quieter not louder - pull out the clevis pin first - coat with grease and see how that goes first since its the easiest of all and the most likely culprit! Hope this helps Cheers JC
pull out the clevis pin first - coat with grease and see how that goes first since its the easiest of all and the most likely culprit! Hope this helps Cheers JC[/QUOTE] Will Do, Thanks again for all the advice & taking the time to help I will let you know how it goes Regards! Greg
Brake Booster stopper mounts Hey Greg just to confirm - the third picture is the return spring - but its on the other side of the circle - bloody hard to see as I said - lol There are only four possibilities for squeaking in the brake pedal The first three have been covered! The fourth being the bracket or master cylinder is loose or cracked- by default these move a lot even when secured! - have someone press the pedal when your looking at the master cylinder inside the engine bay and the amount of movement is scary! That's why many people insert brake booster stopping mounts to prevent it moving (also increases braking effect as a result). I never knew about this until Anti told me to watch the brake booster and he pressed on the pedal- bloody scary and certainly a design fault! The stopping mounts can be aquired through CZP or in the wanted/ for sale sections - the clevis pin is still the most likely culprit but the brake booster stopping mounts are a good thing to have regardless of where the squeaking is coming from! Cheers JC
Squeak now gone Used some silicon grease spray with the small nozzle extension Sprayed the Clevis pin & Return Spring area Thanks Again everyone Greg ( OldRedZed )
Hey Greg Glad it was the clevis pin - easiest of the four to diagnose and fix - but be advised you will probably need a new clevis pin and plastic stopper in the long run to prevent the squeal from returning Cheers JC
