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Replacing brake pads

sovereign-dave
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Re: Replacing brake pads

Postby sovereign-dave » Sun Feb 26, 2012 7:39 pm

All I do is cut the wires a few inches from the plug, bare the wires and join them together, I usually solder mine together and insulate them, plug the plug back in and you are away.
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naki_k
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Re: Replacing brake pads

Postby naki_k » Sun Feb 26, 2012 8:25 pm

front brake pad wear sensor DBC6595 £10.65 each, from jdht. depends how often you get under there to inspect it, but i reckon they are worth having in there.

funny as when i worked on my front brakes. there wasn't any wear sensors on either front wheel, and no warning light. am guessing someone has bridged it out previously already?
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nlcrane
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Re: Replacing brake pads

Postby nlcrane » Sun Feb 26, 2012 9:19 pm

Again my question, if the sensors have been removed and the Instrument Pack inputs “Brake pad supply” and “Brake pad sense “have been short-circuited, then the dash warning lamp will be extinguished, but the MOT guy poking about underneath will surely have something to say about the “modification”, that is if he sees it.
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rvdz
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Re: Replacing brake pads

Postby rvdz » Sun Feb 26, 2012 10:58 pm

XJ40-MARK wrote:i`m glad you sorted it and i was wrong (again) :D sounds like you could do with a couple of new calipers though. as sovereign-dave points out, if you need a g-clamp to push the piston back, there`s something wrong!

Not to worry, your advice is appreciated as always.

I could do with some new calipers indeed although I'm not sure what to go for, what would you suggest - brand new or second hand? What sort of price range should I be looking for, and after market or genuine jag parts?

naki_k wrote:front brake pad wear sensor DBC6595 £10.65 each, from jdht. depends how often you get under there to inspect it, but i reckon they are worth having in there.

Thanks for that, I shall order one as I don't want to run the risk of failing the MOT for the sake of a tenner.
Roel

1994 Sovereign 4.0 Auto [698760]

rvdz
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Re: Replacing brake pads

Postby rvdz » Mon Feb 27, 2012 7:06 pm

I've bought a set of second hand calipers from eBay today.
http://www.ebay.co.uk/itm/110804793551

According to the seller the pistons are in good working order, so we will see when they arrive.

I've also bought a new brake pad wear sensor and two brake pipe hoses. I'll probably have some fun trying to take off the existing hoses as they are quite rusty! Has anyone done that before?

Also, does anyone have recommendations on brake fluid. The manual states Gastrol Dot4 I believe but there is quite a lot of choice out there.

Thanks in advance.
Roel

1994 Sovereign 4.0 Auto [698760]

nlcrane
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Re: Replacing brake pads

Postby nlcrane » Mon Feb 27, 2012 7:38 pm

"The car braked fine before I removed them"
Well I suppose that that is some kind of warrenty.
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naki_k
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Re: Replacing brake pads

Postby naki_k » Mon Feb 27, 2012 9:48 pm

on the subject of replacing calipers.
has anyone ever refurb'd calipers, using the seal kit? they seem to be about £10 per caliper?
the obvious concern with buying a used calipers, is it any better than the one coming off, and how long will it last?
considering that calipers have very parts in them, its only really the seals, nipples and pistons that go. wondered whether its worth trying to rebuild one. the only bit that looks possibly tricky is getting the piston seal and piston back in?
would be interested to hear from anyone who has done it before? am sure everyone did it in the good old days (del boy will remember :) ) when nothing was thrown away, and everything was repaired/ refurb'd.
88 3.6 XJ6 PDH/CEM
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old del boy
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Re: Replacing brake pads

Postby old del boy » Tue Feb 28, 2012 12:39 am

Yes you're right , i do and if i remember rightly getting the new piston seals in isn't as easy as you would think as they're a very good fit and don't seem to want to go in :lol: , you must not even scratch them or damage them even slightly or they will leak , these days i would only do it myself if there was no alternative , there should be a post on here somewhere as one of our members did his own some time back :?

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Equinoxstudios
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Re: Replacing brake pads

Postby Equinoxstudios » Tue Feb 28, 2012 1:02 am

old del boy wrote:Yes you're right , i do and if i remember rightly getting the new piston seals in isn't as easy as you would think as they're a very good fit and don't seem to want to go in :lol: , you must not even scratch them or damage them even slightly or they will leak. Derek..

Indeed, I'd be in a white coat with lint-free gloves in a clean room! ;) :ugeek:

I'd be trying to polish the sealing surfaces in the bores and pistons until they were mirror and inserting pistons with mylar film (a thin but quite rigid high temperature 'plastic' sheet) wrapped around the rubber seal to insert it into the bore (a bit like you would use a piston ring compressor around piston rings going into an engine block). Then you can insert the piston+seal combo easily into the bore just enough so that you can still gently withdraw the mylar film thereby allowing the lip of the seal to touch only the polished surface of the caliper bore for the first time.

Sounds a bit anal but it's my best method to avoid any damage to the fragile seal lip when inserting into the caliper. Guaranteed to last for years :mrgreen:
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rvdz
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Re: Replacing brake pads

Postby rvdz » Tue Feb 28, 2012 2:36 pm

That sounds a little dangerous. For the money of second hand or reconditioned calipers I don't think I'd run the risk...
Roel

1994 Sovereign 4.0 Auto [698760]


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