1990 Q45 Flush Braking System to Overhaul Brakes and use Synthetic Dot 5

[slshearer]

Hello,

I am planning to install new calipers, rotors, master cylinder, change the brake lines to Russell Stainless brake lines and wanted to know the best way to flush the system of the old fluid, since the system has 4 wheel ABS I am not sure what is required to flush and bleed the system, would appreciate some expertise on the process.

Thank you!Stewart

[maxnix]

Cannot use DOT5, DOT 3 or 4 only.

[Infinitiguy19]

Why not DOT 5 I thought you could always use better fluids, But you would always have to use the factory required at the very least.

[maxnix]

DOT5 is incompatible with the seals.

[Infinitiguy19]

What about 300ZX AKA Z32 brakes would it work with them?

[slshearer]

Dot 5 is synthetic and is recommended for any new braking system as lon as there is no old fluid in the system, what seals are you referring to??

[Infinitiguy19]

caliper pistons I think there might be more.

[Q45tech]

Disassemble the braking system clean and replace caliper seals, install new flex hoses all around.

I assume the 90 has a replacement ABS control module as everyone of 90's leaked early on if not be careful.

Same with master cylinder it should have a yellow cap on filler port.