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ns rear brake cylinder

 
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BigAl
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PostPosted: Wed Jul 16, 2008 9:27 pm    Post subject: ns rear brake cylinder Reply with quote

As i was having my exhaust done today, i noticed a drip coming from the wheel whilst the car was on the 2 poster. I guess mine has given up Sad Managed to source a new one for £11.56 all in and will fit it tomorrow at a garage incase anything goes wrong. Place bets now on what will go wrong
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Ben_nz
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PostPosted: Thu Jul 17, 2008 2:44 am    Post subject: Reply with quote

My bet is the brake shoes will have worn grooves into the drums and you won't be able to get the drums off. And when you give up and want to put everything back together, you'll realise you can't re-use the hub nuts because they're too damaged. And while you're under the car you'll notice rust in the seams in the rear wheel arch area. Razz
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eagle3
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PostPosted: Thu Jul 17, 2008 3:45 am    Post subject: Reply with quote

Ben_nz wrote:
My bet is the brake shoes will have worn grooves into the drums and you won't be able to get the drums off. And when you give up and want to put everything back together, you'll realise you can't re-use the hub nuts because they're too damaged. And while you're under the car you'll notice rust in the seams in the rear wheel arch area. Razz


Now now, it may not be that bad. Smile

A replacement hub nut is good idea to start. Of course you could get the mechanic to change the 2 cylindres, all the shoes, machine the drums, change the wheel bearings and not have to worry about it again. Very Happy
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john 33_16v
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PostPosted: Thu Jul 17, 2008 8:17 am    Post subject: Reply with quote

Ben_nz wrote:
you'll realise you can't re-use the hub nuts because they're too damaged.


Then you'll go to main stealer who will put hubnuts on back-order for you, after chraging you about £25 for a packet of 10. - If this happens i'll take 4 off your hands!

John
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BigAl
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PostPosted: Thu Jul 17, 2008 10:36 am    Post subject: Reply with quote

lol, im cracking up Smile I checked brake fluid levels before leaving today and there was only a little in there. I topped up, checked the brakes and off I went.
I regularly clean up in the arches and there is no rust Laughing I have new shoes to put on for the mot which is due next month, as I know mine are low. I know about the lip, comes from being an alfa owner I guess and also sand that off every time I adjust the handbrake. I definitely need new castle nuts and will pick them up today, if they have in stock, not!!! I was advised to change the other cylinder as well, as it will probably give up soon, I will see how it is in a pre mot. Just got back, job done, no probs, what a surprise.
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BigAl
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PostPosted: Thu Jul 17, 2008 11:39 pm    Post subject: Reply with quote

Castle nuts are no longer available from alfa!!!
I got 1 from bianco and the other from rusper alfa
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Ben_nz
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PostPosted: Sat Jul 19, 2008 7:14 am    Post subject: Reply with quote

BigAl wrote:
Castle nuts are no longer available from alfa!!!

Alfa sux. Rolling Eyes
My mechanic told me the nuts from some Ford Laser (I think) will fit. They're easy to come by. The thread's the same although the nut is actually smaller, and I've been using these since just after I bought a socket large enough to fit the factory Alfa nuts. Rolling Eyes
I just take an old one of these to Repco to make sure I'm getting the right part, and buy a bunch of them for little money.
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BigAl
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PostPosted: Sat Jul 19, 2008 8:20 am    Post subject: Reply with quote

thats good to know, there is a nut and bolt shop near me, i might pop in there to see if they stock such things aswell.
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Ben_nz
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PostPosted: Tue Jul 22, 2008 11:06 am    Post subject: Reply with quote

Guess what, after me prophesying doom when you attempted to disassemble a rear drum, my grey 1.5TI failed its warrant inspection today because the rear brakes were out of balance. Rolling Eyes
The testing station has rollers that test the braking of each wheel individually, and they showed the left rear was 160 Magic Brake Units, but the right rear was 100MBU. Using the handbrake, both rear brakes were even.
I went out brake testing afterward in the rain and initially I do believe I noticed the left rear locking up first - the back of the car would slide out to the left / car wanted to rotate to the right.

Because the handbrake strength was the same for both sides, would this indicate that the brake pads aren't contaminated with brake fluid?
Could I still have a leaking brake cylinder on the right rear wheel?
Will my brake bias valve be playing up?
Or do I just need to Italian Tuneup the brakes and sit the test again with lots of weight in the boot?
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BigAl
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PostPosted: Tue Jul 22, 2008 3:51 pm    Post subject: Reply with quote

as far as i know the hand brake is done by the cable, which pushes one side of the shoes out to meet with the drum. The foot brake operates the cylinder pushing out both shoes. It could be that one of the pistons in the cylinder, on the side that is low on performance, is sticking. Are you loosing any fluid?
I need to check my brakes for equality too.
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BigAl
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PostPosted: Tue Jul 22, 2008 6:50 pm    Post subject: Reply with quote

Forgot to say that i popped into the nut and bolt shop, but they dont do them. When i do my shoes i will swap the castle nuts around, advice from an alfa garage i got the nuts from.
I just looked at the manual and found the correct way to do nut.
Tighten to 25 - 29Nm while rotating drum 4 or 5 turns in each direction, partially slacken nut and strike stub shaft with a mallet, then hand tighten to specified torque.
Then goes on about checking end float, which i dont have and peening over nut when done.
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lee16v
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PostPosted: Tue Jul 22, 2008 8:34 pm    Post subject: Reply with quote

I got hub nuts from Mangoletsi not that long ago and they were about £2-3 each.
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Ben_nz
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PostPosted: Wed Jul 23, 2008 11:29 pm    Post subject: Reply with quote

BigAl wrote:
It could be that one of the pistons in the cylinder, on the side that is low on performance, is sticking. Are you loosing any fluid?

I don't think I'm losing fluid. I started the motor this morning and repeatedly tried to push the brake pedal through the floor. The pedal didn't keep sinking and the level of the fluid didn't drop, although maybe those were just the wrong conditions to allow the cylinder to leak.
If I had angel and devil characters on my shoulders advising me, one would be telling me to pay someone to check everything properly and bleed the brakes, and the other would be encouraging me to take my warrant-less car out for an illegal brake-abusing joyride and try to fluke my way through the warrant retest.. Twisted Evil
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BigAl
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PostPosted: Thu Jul 24, 2008 9:49 am    Post subject: Reply with quote

I would take the drum off, get someone to gently push the brake pedal and see if one of the pistons in the cylinder is stuck. I would also check to see that the brake shoe hasnt jammed. Maybe you could stop the good side from moving and see if the stuck side would work free. If the cylinder is at fault, remember that they are sided.
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