can anyone tell me if there is a bleed nipple on the abs unit in the boot seem to be having a prob bleeding brakes fluid in brake resevior dont go down when u press pedal

or is there some other prob ive missed seems u have to rely on gravity to get any fluid out of the bleed nipple

Pre '94 models have two bleed nipples on the ABS unit. Make sure you follow bleed order and procedure as per FSM:

 

http://www.300zx.co.uk/tech/manual/manual/br/005.gif

 

-Andrew

Pre '94 models have two bleed nipples on the ABS unit. Make sure you follow bleed order and procedure as per FSM:

 

http://www.300zx.co.uk/tech/manual/manual/br/005.gif

 

-Andrew

 

cheers bud are the nipples on the abs unit labled

Sounds to me as though you might have an issue with the master cylinder. You should be able to at least push fluid through at the calliper.

Were you having a particular issue prior to bleeding the system?

cheers bud are the nipples on the abs unit labled

 

Yes, nipples are next to pipes marked FR, FL (front pair) and B (back).

 

-Andrew

Yes, nipples are next to pipes marked FR, FL (front pair) and B (back).

 

-Andrew

 

is it the same procedure as bleeding the calipers

Sounds to me as though you might have an issue with the master cylinder. You should be able to at least push fluid through at the calliper.

Were you having a particular issue prior to bleeding the system?

 

no nothing in particular until i had a brake pipe renewed at mot but it was only a very short one on the front caliper

is it the same procedure as bleeding the calipers

 

Yes, as per FSM steps shown in link above. You have Brembo calipers fitted? If so, you will need to bleed both sides

of each caliper, outer nipple first then inner nipple.

 

-Andrew

Edited July 5, 201312 yr by AndrewG

Useful info there Andrew thanks.

 

I've got a couple of brake questions if you don't mind on your thread Spritley.....

 

If you upgrade to a higher spec brake fluid how should you go about doing it? I know you have to completely clear the old stuff but do you do this with the new fluid or air first then the new fluid? I see clearing the ABS unit as the biggest issue.

 

Znut, if you see this I saw you mention a tool for brake bleeding any idea what make and model it is? I thought you said Snap-on but can't find the post in the search.

Flush the old fluid out with new fluid, a litre should do it. Watch for the change in colour as the new fluid comes out. Old fluid

is usually darker. Bleeding the ABS unit should not be a problem, provided you have bleed nipples on the unit. Later models 94+

didn't always have them as Nissan changed the supplier.

 

-Andrew

Edited July 5, 201312 yr by AndrewG

Yes, as per FSM steps shown in link above. You have Brembo calipers fitted? If so, you will need to bleed both sides

of each caliper, outer nipple first then inner nipple.

 

-Andrew

 

cheers for that yes i have brembos on the front

Useful info there Andrew thanks.

 

I've got a couple of brake questions if you don't mind on your thread Spritley.....

 

If you upgrade to a higher spec brake fluid how should you go about doing it? I know you have to completely clear the old stuff but do you do this with the new fluid or air first then the new fluid? I see clearing the ABS unit as the biggest issue.

 

Znut, if you see this I saw you mention a tool for brake bleeding any idea what make and model it is? I thought you said Snap-on but can't find the post in the search.

 

Hi they all work on the same principle of creating vacume at the caliper end to draw the fluid through...mine is an expensive unit but they all do the same job bud...heres a link to show you what one looks like bit iff you search the web you might find cheaper. Read your pm so thought ide answer here to help others;). Bleeding an ABS with these things can damage the units as some are push only with relation to seals inside the units.

http://www.amazon.co.uk/Bike-It-VACUUM-BRAKE-BLEEDER/dp/B002P0WJ3Y

Some times the master cylinder gets air trapped behind the piston, what you need to do is with an assistant ready at the ABS with a bleed tube into a container and a 10 mm spanner on the bleed screw. Now pump the brake pedal quickly 15 times and when done hold at the bottom and tell the assistant to open the bleed, in most cases the extra built up pressure will cause a sudden rush and pull the air from the master cylinder, if not just repeat.

 

One important point is the piston and seal do not normally go all the way down the cylinder and actually pushing it this low down can some times pop the seal, to prevent this do not go all the way to the bottom and the easiest way to deal with this is to place a bit of wood or similar under the brake pedal to actually prevent it going to the floor.

 

 

Jeff ex Zedworld

Some times the master cylinder gets air trapped behind the piston, what you need to do is with an assistant ready at the ABS with a bleed tube into a container and a 10 mm spanner on the bleed screw. Now pump the brake pedal quickly 15 times and when done hold at the bottom and tell the assistant to open the bleed, in most cases the extra built up pressure will cause a sudden rush and pull the air from the master cylinder, if not just repeat.

 

One important point is the piston and seal do not normally go all the way down the cylinder and actually pushing it this low down can some times pop the seal, to prevent this do not go all the way to the bottom and the easiest way to deal with this is to place a bit of wood or similar under the brake pedal to actually prevent it going to the floor.

 

 

Jeff ex Zedworld

 

cheeers jeff does it matter which bleed nipple on the abs i open the front or the rear. The pedal seems to harden up the more u use it but this can take a while do u think a replacement master would help also

Edited July 8, 201312 yr by spritley56

I usually open the nipple thats is easiest to see first and the other one after, what was the run up to the issue?

 

Jeff ex Zedworld[/color]

spritley, the correct order is in the FSM link above...

 

-Andrew

I usually open the nipple thats is easiest to see first and the other one after, what was the run up to the issue?

 

Jeff ex Zedworld[/color]

 

the run upwas all was ok till i had a front small brake pipe replaced for the mot they said that they couldnt bleed it to get a firm pedal but it seemed to right itself when i brought it home it now just seems a bit wierd thats all its as if you have to wait on gravity to bleed them specially the brembos also wondered if the system would benefit from a complete fluid change

Edited July 8, 201312 yr by spritley56

spritley, the correct order is in the FSM link above...

 

-Andrew

 

yep i know but dont seem to make a difference thanks for your input and advice