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MOT Failure

katar83
Posts: 2932
Joined: Tue Aug 23, 2011 11:17 am
Location: Cambridge

Re: MOT Failure

Postby katar83 » Thu Feb 13, 2020 4:45 pm

I'd trust Timken and Jaguar on these straps, better safe than sorry and there is a potential for lots of static building up in these rotating wheels as per Timken info. Without them, bearings will just wear out much quicker.

Bummer re bleed nipple, I never attempted undoing the front ones on any of my front calipers without derusting them first as they did look like they could shear off easily. I suppose you could leave yours to derust first too? Just put yours, hanging on the old flexi in a bucket of hot water and deox-c or citric acid, that way, you'll get most corrosion off in an evening and will be able to undo the bleed nipple easily.

Good luck with drilling the broken one out, if you won't be able to get it out, I've just listed a pair of refurbed front calipers from my old x300 on eBay :geek:
1996, 3.2 SWB X300 - Finally a rust free daily driver :)
1997, 4.0 LWB X300 - Unlucky car.
1988, 3.6S XJS - Never ending restoration project.
1994, 3.2S X300 - Accident damaged, October 2015. Gone!
1994, 3.2S XJ40 - Long gone.

Aidan
Posts: 810
Joined: Fri Jun 26, 2009 11:57 am
Location: Tonbridge, Kent

Re: MOT Failure

Postby Aidan » Thu Feb 13, 2020 5:11 pm

Yes, JCP sell the straps for about £11 each so I guess I'll just bite the bullet now that the damn bleed nipple has given me extra time to fix stuff before the re-test. Thanks for the tip about de-rusting the nipples. Do you mean submerge the whole caliper in the bucket, rubber bellows and all? Then how do you clean the solution off afterwards; brake cleaner?

Regards,
Aidan

1994 Moroccan Red XJ40 3,2 Sport ("Ruby")
1995 Jade Green X300 3,2 Sovereign ("Jade")
2005 Cedar Green Pearl Volvo XC 90 SE - Sold
2007 Colorado Red Ford Galaxy Ghia

Aidan
Posts: 810
Joined: Fri Jun 26, 2009 11:57 am
Location: Tonbridge, Kent

Re: MOT Failure

Postby Aidan » Thu Feb 13, 2020 5:27 pm

PS. Thanks for the heads up about your calipers. If I get desperate, you may be hearing from me :cry: .

Regards
Aidan

1994 Moroccan Red XJ40 3,2 Sport ("Ruby")
1995 Jade Green X300 3,2 Sovereign ("Jade")
2005 Cedar Green Pearl Volvo XC 90 SE - Sold
2007 Colorado Red Ford Galaxy Ghia

katar83
Posts: 2932
Joined: Tue Aug 23, 2011 11:17 am
Location: Cambridge

Re: MOT Failure

Postby katar83 » Thu Feb 13, 2020 5:58 pm

With my calipers, I basically cut the old flexi in half, the top bit, I've plugged in so brake fluid not leaking anywhere, the bottom part of the flexi, with the caliper, I've submerged fully in bucket of hot water with Deox-C fairy dust/citric acid, with just the cut off flexi sticking out. The caliper has seals that prevents any water getting inside the caliper if you don't plan to refurbish it fully it can stay like this in the bucket until its fully derusted. Afterwards, you just rinse it in water and paint if you want, with whatever paint you have. I suppose, you could even just submerge even the bit where the bleed nipple is.

Refurbing it fully, means at the end of this process, you just pull out the piston completely, swap the rubber seal and boot and piston if you want/need to, depends on how far you want to go really here. Its all easy work, just extra costs and time. New pistons are a tenner on eBay, rubbers are ~£20 for a pair.
1996, 3.2 SWB X300 - Finally a rust free daily driver :)
1997, 4.0 LWB X300 - Unlucky car.
1988, 3.6S XJS - Never ending restoration project.
1994, 3.2S X300 - Accident damaged, October 2015. Gone!
1994, 3.2S XJ40 - Long gone.

Aidan
Posts: 810
Joined: Fri Jun 26, 2009 11:57 am
Location: Tonbridge, Kent

Re: MOT Failure

Postby Aidan » Thu Feb 13, 2020 8:49 pm

katar83 wrote:With my calipers, I basically cut the old flexi in half, the top bit, I've plugged in so brake fluid not leaking anywhere, the bottom part of the flexi, with the caliper, I've submerged fully in bucket of hot water with Deox-C fairy dust/citric acid, with just the cut off flexi sticking out. The caliper has seals that prevents any water getting inside the caliper if you don't plan to refurbish it fully it can stay like this in the bucket until its fully derusted. Afterwards, you just rinse it in water and paint if you want, with whatever paint you have. I suppose, you could even just submerge even the bit where the bleed nipple is.

Refurbing it fully, means at the end of this process, you just pull out the piston completely, swap the rubber seal and boot and piston if you want/need to, depends on how far you want to go really here. Its all easy work, just extra costs and time. New pistons are a tenner on eBay, rubbers are ~£20 for a pair.


Thanks very much for the how-to, Katar. I'm not at all experienced in the dark arts of anything other than spannering something off and spannering something on again... with the help of a book or two... which I sometimes don't read carefully enough :oops: . So these proper diy ideas are really helpful to me. I suppose since I've got the time now, and a new set of nipples en route from JCP, I think I'll try bit of citric acid de-rusting this weekend to try and free the nipple ;).
I'll let you know how I get on. Makes me want to rebuild some calipers now :) .
Aidan

1994 Moroccan Red XJ40 3,2 Sport ("Ruby")
1995 Jade Green X300 3,2 Sovereign ("Jade")
2005 Cedar Green Pearl Volvo XC 90 SE - Sold
2007 Colorado Red Ford Galaxy Ghia

Aidan
Posts: 810
Joined: Fri Jun 26, 2009 11:57 am
Location: Tonbridge, Kent

Re: MOT Failure

Postby Aidan » Tue Feb 18, 2020 2:46 pm

Okay, I'm beaten. :(
The caliper cleaned up nicely enough in the overnight citric acid bath. I wire-brushed all the rust away from the bleed screw threads, treated it with Plusgas, heated it with a blow-torch and quenched it with chilled water - twice - drilled out the centre and used two kinds of seized bolt removers. The first one - the tapered reverse thread screw kind - did nothing and I was worried it would snap off in the hole, so I drilled the nipple out to 4,5mm and used an EZout. This did nothing but get jammed in the centre of the bleed screw, and I was worried it would snap off in the hole. So while tapping it from side to side with a hammer to loosen the EZout, guess what... it snapped off in the hole. It can't be drilled out - I tried and my drill bit snapped. So I'm done :x .
Katar, could you please point me to your refurbed calipers on eBay if they're still available? I just need to get this thing back to MOT now. I don't want to go through the same story with the other caliper, so I'm going for replacement calipers.
Aidan

1994 Moroccan Red XJ40 3,2 Sport ("Ruby")
1995 Jade Green X300 3,2 Sovereign ("Jade")
2005 Cedar Green Pearl Volvo XC 90 SE - Sold
2007 Colorado Red Ford Galaxy Ghia

katar83
Posts: 2932
Joined: Tue Aug 23, 2011 11:17 am
Location: Cambridge

Re: MOT Failure

Postby katar83 » Tue Feb 18, 2020 5:28 pm

That's a bummer.

The only way to do it initially would be to drill out snapped nipple as close to thread as possible and then tap it, these screw extractors rarely work in cast iron and tap would be able to get through bleed nipple remains if you drilled it out almost completely.
You definitely wont be able to drill it out now anyway, you'd need a carbide drill bit and a bench drill. Not something you'd want to attempt and not really worth it.
Anyway, link/info to my calipers sent.
Keep the piston from your old caliper if it's in excellent shape, otherwise it's a scrap metal now.
1996, 3.2 SWB X300 - Finally a rust free daily driver :)
1997, 4.0 LWB X300 - Unlucky car.
1988, 3.6S XJS - Never ending restoration project.
1994, 3.2S X300 - Accident damaged, October 2015. Gone!
1994, 3.2S XJ40 - Long gone.

Aidan
Posts: 810
Joined: Fri Jun 26, 2009 11:57 am
Location: Tonbridge, Kent

Re: MOT Failure

Postby Aidan » Tue Feb 18, 2020 5:32 pm

katar83 wrote:That's a bummer.

The only way to do it initially would be to drill out snapped nipple as close to thread as possible and then tap it, these screw extractors rarely work in cast iron and tap would be able to get through bleed nipple remains if you drilled it out almost completely.
You definitely wont be able to drill it out now anyway, you'd need a carbide drill bit and a bench drill. Not something you'd want to attempt and not really worth it.
Anyway, link/info to my calipers sent.
Keep the piston from your old caliper if it's in excellent shape, otherwise it's a scrap metal now.


Thanks Katar, I'll check my PMs and proceed asap. I'm tempted to keep the caliper and get a shop to clear the hole then re-furb them to recoup costs.
Aidan

1994 Moroccan Red XJ40 3,2 Sport ("Ruby")
1995 Jade Green X300 3,2 Sovereign ("Jade")
2005 Cedar Green Pearl Volvo XC 90 SE - Sold
2007 Colorado Red Ford Galaxy Ghia

Aidan
Posts: 810
Joined: Fri Jun 26, 2009 11:57 am
Location: Tonbridge, Kent

Re: MOT Failure

Postby Aidan » Tue Feb 18, 2020 5:41 pm

PM sent to you, Lucas.

Regards,
Aidan

1994 Moroccan Red XJ40 3,2 Sport ("Ruby")
1995 Jade Green X300 3,2 Sovereign ("Jade")
2005 Cedar Green Pearl Volvo XC 90 SE - Sold
2007 Colorado Red Ford Galaxy Ghia

naki_k
Super Moderator
Posts: 28912
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: MOT Failure

Postby naki_k » Thu Feb 20, 2020 5:42 pm

All these things that should be simple, so rarely are in reality.
I think sometimes you just have to spend your way out of problems and buy new/ recon parts and get the job done.

Keep at it, it will be worth it in the end.
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300


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