GU 3.0tdi brakes
Submitted: Tuesday, Sep 19, 2006 at 10:24
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Peter McG (Member, Melbourne)
To 3.0 owners out there. I have the car back at the dealer today again for the brakes to be checked out. Sitting in the car at idle and I can push the pedal to the floor with minimal pressure. Now I know there has been crticism of the brakes n the past but check yours and let me know if it does the same. It doesn't seem normal to me and they tell me they have bled the lines at the recent 120,000 service.
Thanks
Peter
Reply By: brian - Tuesday, Sep 19, 2006 at 10:35
Tuesday, Sep 19, 2006 at 10:35
Definately not normal i have a solid pedal in
mine,
AnswerID:
195279
Reply By: Member - Craig D (SA) - Tuesday, Sep 19, 2006 at 10:37
Tuesday, Sep 19, 2006 at 10:37
Peter, I never had that problem when I had a 3 litre Patrol - probably only got to halfway depression at idle, with a second depress (pump) of the pedal hardening it right up. This was after having the lines bled, etc as
well. The brakes in my Patrol, as all Patrols, feel a tad spongy until you really need them then I can tell you from experience they will certainly pull you up quick smart!
AnswerID:
195280
Reply By: joc45 - Tuesday, Sep 19, 2006 at 11:42
Tuesday, Sep 19, 2006 at 11:42
A problem I had with brakes on a previous vehicle (not a Patrol) was that when heated, the rubber buckets in the master cylinder would expand, and not allow the piston to fully return after being released. Next time the pedal was pushed, the piston would go in a bit further, till after several activations, the pedal would be at the limit of its travel; ie, on the floor. It took me a fair while to find the problem, as it would not show the symptoms when checked in a garage, coz it had cooled down. Replacement of the buckets fixed the problem, but I also changed the type of brake fluid, as this may have been causing the buckets to swell, along with heat. Some years ago, a certain brand of brake fluid was withdrawn because it caused swelling in the rubbers in the brakes.
The situation in this vehicle was aggravated in that the master cyl was right near the exhaust manifold, which is not the case in the Patrol.
Perhaps the dealer stuffed up with re-bleeding the system. I once made the mistake of completely draining the fluid in my old Mav (GQ), and had a hellova job getting the last of the air out after refilling, giving similar symptoms to what you describe. On my GU, I just followed the book and pumped new fluid thru (without draining the old fluid) till I could see fresh fluid coming out, and had no problems.
Gerry
AnswerID:
195290
Follow Up By: Peter McG (Member, Melbourne) - Tuesday, Sep 19, 2006 at 11:51
Tuesday, Sep 19, 2006 at 11:51
Thanks Gerry. I suspect there is still some air in the lines from the wheel incident back in May. I'm hoping they get it right today.
Peter
FollowupID:
453363
Follow Up By: Gerhardp1 - Tuesday, Sep 19, 2006 at 21:51
Tuesday, Sep 19, 2006 at 21:51
Not sure if this is an issue with the Patrol, but when bleeding the brakes on the Jackaroo (with ABS) you have to remove the ABS relay and the engine must be running while bleeding, and the bleeding must be in a certain sequence.
I'm pretty sure that if that's the case also with a Patrol, then a dealer would most likely get it wrong - it would probably go something like this "Hey you, you first year apprentice - bleed the brakes on this thing while I go and have a smoke"
I have had no problems with renewing the fluid (which I do regularly). Next time I do the brakes I will also do the rubbers in the master cylinder and if needed have it honed/sleeved as it's now 8+ years old and 130,000ks. Maybe unnecessary but I do like my brakes...........
FollowupID:
453484
Follow Up By: joc45 - Wednesday, Sep 20, 2006 at 16:47
Wednesday, Sep 20, 2006 at 16:47
Gerhard,
sounds formidable! And
mine is only a non-ABS system! Anyway, it does sound like the apprentice was given the job and stuffed it up.
I'd considered using Dot5 silicon fluid so it never needs replacing again, but there are some compatability issues depending on the rubber type used in the system. The extra cost of the fluid is less than replacing one corroded slave cyl.
Nissan tech dept were unable to tell me what sort of rubber was used so I never went ahead with it.
Gerry
FollowupID:
453637
Reply By: PandJ - Tuesday, Sep 19, 2006 at 17:28
Tuesday, Sep 19, 2006 at 17:28
Hi Peter,
I have a 2003 ST-L Patrol and the brakes were RS so took it back to dealer. They bled brakes and still no good. They then rang Nissan and Nissan agreed to fitting new master cylinder. A great difference was achieved. I do not like ABS brakes.
Cheers P&J
AnswerID:
195362
Follow Up By: Member - Roachie (SA) - Wednesday, Sep 20, 2006 at 17:06
Wednesday, Sep 20, 2006 at 17:06
G'day,
My GU is the 1st vehicle I've owned with ABS. I like to have it there, but it is dead-set bloody dangerous on loose gravel!!!!
So, I've removed the fuse and made up an adaptor gizmo that fits in where the fuse used to live. It has 2 wires attached to a small piece of pc board. The wires have an in-line fuse of the same value as the one I removed (7.5amps) and they lead up to a dash-mounted switch, so I can flick the ABS off whenever I hit loose gravel. Great result and it's just one of about 67 things I've done to my truck which are probably both illegal and insurance-claim-voiders!!!
FollowupID:
453640
Reply By: Member - Phil G (SA) - Tuesday, Sep 19, 2006 at 20:09
Tuesday, Sep 19, 2006 at 20:09
I've had that issue with other vehicles - usually due to a little residual air. Bleeding at the master cylinder, prior to bleeding each wheel, usually fixed the problem.
AnswerID:
195395