is300word

I have a 1993 LS400 and the brakes are really soft. The front pads pads have over 50% and the car has the proper amount of brake fluid. I did a search and people had mentioned that some pins may be bad and need to be lubed, but I just checked and couldnt find these pins. If this is the issue could anyone show me a pic of these. If not any help would be appreciated. Thanks in advanced.

LiCelsior

iTrader: (32)

welcome to the forums, follow this tutorial and bleed the brakes.

http://www.lexls.com/tutorials/brake/bleeding.html

hobojoe

its a huuugeee car its always been a problem in my opnion....ss lines and d/s rotors have helped me a ton.

LiCelsior

iTrader: (32)

also, those ppl may be refering to the sliding pins.

is300word

Ill take a look at both of those things.


Thanks for your guys help BTW

JimsGX

You might have old fluid that has water contamination. A full brake fluid flush / caliper bleed would be a good idea. Start with the left rear, then right rear, then right front, then left front.

The brake slider bolts are what the calipers bolt to (14mm bolts). They have rubber boots on them and slide in and out to center the caliper on the rotors when you take your foot off the brake. After unbolting the caliper from them, you can peel back their rubber boots and pull them out of their sockets. They have rubber bushings on the ends of them when you pull them out. They should be cleaned and greased up with a synthetic grease before reinserting them. Also, it's a good idea to spray some brake cleaner inside the sockets and use a tightly rolled up paper towel inside the sockets to clean out the old grease and remove the brake cleaner. Don't put the sliders back into the sockets without being sure the brake cleaner has fully evaporated. The cleaner can have an adverse effect on the slider bushings and make the rubber on them expand (that's a no no). On the front's, the top sliders have smooth bushings on them. The bottom sliders have fluted bushings on them. On the rear, the top sliders should have no bushings on them and the bottom sliders should have fluted bushings on them.

2 quarts of fluid will do it.

is300word

Thanks guy. I really appreciate it. The passenger front had a stuck lower pin and the passenger rear had a stuck lower pin. I took them out and re lubed them. Then I flushed the brakes via the DIY. They work great now. I couldnt thank you guys more.

python

iTrader: (4)

go dot 4 or higher on the fluid and put in ss lines u will be amazed at the difference

3UZFTE

Dot 3 or Dot 4, Dot 5 isn't compatible with our system as it is a synthetic silicone, not a hydraulic style fluid. If you did want to upgrade to Dot 5, it would be expensive and only beneficial if you are racing. I'm pretty sure some of the fastest Supras and Aristos run Dot 4. The only difference between Dot 3 and 4 is their respected boiling temps, as Dot 4 is able to withstand higher temperature, which our cars wont reach anyways. And even in a bind, you can add Dot 4 to Dot 3, but if you add Dot 3 to Dot 4, it simply turns it in to Dot 3. I have also heard that the brake caliper pistons tend to stick, and need rebuilding over long term use, there is a great write up on LexLS.com.

PureDrifter

iTrader: (10)

i heart ATE SuperBlue

python

iTrader: (4)

dot 5.1 is compatible,also brake fluids need flushing every 2 years regardless of milage as it is a moisture magnet