problem with GQ brakes

Had a 79 series with front calipers playing up, Bozo, and it turned out the master cylinder was problem. The screw seperating front and rear bucket assemblies, was worn, and gave an intermittent seizing. New M/cyl. kit and no dramas. Worth a look. hooroo...

If you play on the beach that's the answer: otherwise
Do you have an Auto?
Do you ride the brakes?
Do you live in the tropics?

If you find them siezing a lot maybe you need to convert to dot 5 - bleed em all and start with Silicone fluid ask your local tyre and brake shop......

Could be bad luck, your driving style/area etc

I rebuilt my 4 GQ calipers 18 mths ago, one needs another kit in it..(Diesel auto, 33's, brakes get a good workout regularly, no sand work, fair bit of mud and crap)

The Genuine kits arent expensive (less than 1/2 the price of ABS), but I wouldnt go with second hand calipers, you never know what your getting, speciall from wreckers... I would either get them rebuilt, or buy NEW ones...

And we both know neither of us could afford Nissan prices on NEW calipers!!

Bozo, how often do you change your brake fluid? I would suggest every 2 years, especially if you are doing a lot of 4x4ing in high altitudes (ie high country) or tropics that involve an atmosphere with a high humidity.

i know it sounds like a pain in the but i was having trouble with my rear calipers siezing just recently but have rebuilt a few for customers mainly r/h/r buy a full set of rebuild kits cost about $15 from repco dosnt come with piston but never had to replace one yet change brake fluid and every time you service it or get it serviced just apply a little grease to the slides.

Bozo.
There is an adjustment on the length of the push rod between the booster and the master cylinder, if this not correctly set you can have a residual pressure in the lines which can cause a similar effect. Eric.

It was the master cylinder!!!