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Jul 16, 2007 13:52:24 GMT
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One thing I am not keeon on with the Cortina is the brakes.
I think they want a bleed anyway as they feel a bit soft, but they also have a rather odd effect when you brake hardish. The car pulls one way and then the other. Not much, but just enough to be a little unsettling. Its like a very slow version of warped discs wobble. (too slow for it to be warped discs)
The car is lowered a fair amount (for a Cortina, not for this forum though) but exhibits no bump-steer or other unwanted characteristics when driving at steady speed.
I'm planning a basic service of the brakes anyway, but any thoughts?
Oddly I'm sure I've had a similar sensation with other lowered cars in the past, but IIRC this was tied to steering issues which this car doesn't have.
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Last Edit: Jul 16, 2007 13:55:38 GMT by akku
1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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Jul 16, 2007 14:07:31 GMT
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Just a thought. How are the suspension bushes? The Mk3-5 is rather prone to woolly handling when the bushes are shot. My Mk1 'tina until recently wandered about in a similar way under braking - I've just rebushed the rear end and its much better. Sounds a bit strange I know, but worth a look.
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Old Fords never die they just go sideways
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Jul 16, 2007 14:17:54 GMT
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It has a full set of pretty much brand new Deflex bushes. Everything front to back.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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Carter
Posted a lot
Posts: 1,535
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Jul 16, 2007 14:25:10 GMT
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My mk1 did this too, unsettling is one word for it, seems to of stopped since i fitted a remote servo and the system was bled. Not much help i know, but just thought id share your unease
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'77 Chevy G20
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"shoping trolley" brakesRobinxr4i
@robinxr4i
Club Retro Rides Member 143
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Jul 16, 2007 14:26:15 GMT
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Are the caliper on the 'tina 2 pots or single pots?
Possibly the piston is sticking? Doesn't sound like it but its a common problem.
Don't expect the brakes to be great 70's and 80's for are notorious for being underbraked. S1 RST are seriously scary under hard braking, brown trouser moments alround!!!
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Sierra - here we go again! He has an illness, it's not his fault.
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Jul 16, 2007 14:36:47 GMT
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It has a full set of pretty much brand new Deflex bushes. Everything front to back. So its not that then ;D
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Old Fords never die they just go sideways
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Jul 16, 2007 14:38:41 GMT
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would modern ford brakes fit the legs on a tina?
or pug 406 stuff as its 4x108 as long as the discs were same thickness
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2001 HONDA CT110 (NOT RCV)
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Jul 16, 2007 14:54:52 GMT
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I've done the brakes recently on my Ford. I would suggest you replace the fluid. Check the pads front and back. Then try it again and see how it feels. Old brake fluid is spongey. New fluid should make a big difference.
My 2000 BMW 328 wanders a bit under braking too. I'm not sure how much your does this but I have given up being alarmed and have now got used to it. On my car I think it is a combination of road camber, big low profile tyres and very firm feeling steering.
Charlie
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Jul 16, 2007 15:24:21 GMT
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I'm used to brakes which are "unenthusiastic". I'm used to Mk3 Cortina brakes. Its more the wandering under moderate to hard braking which is of concern.
They are dual piston calipers.
I will be replacing the pads and shims anyway as there is some squeak when hot.
IIRC the brakes are stock 1600L with the 2000 servo added. IIRC it has new flexis. I wonder if theres some air still trapped somewhere in the system?
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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Jul 16, 2007 15:38:17 GMT
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Wibbly shocks or tyres with floppy sidewalls. My old Volvo had a sort of wandering feeling which was cured by fitting new tyres with stiffer sidewalls.
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Peugeot 307sw - Suzuki SV650S - MX5.
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Jul 16, 2007 16:49:18 GMT
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Would like to bet it's got a sticking piston in one of the calipers.....The Scrote had this problem until we gave it a good going over with some Copaslip and a new set of pads, it's absolutely transformed it in the braking dept. Shame it still accelerates like a stock 100E with a plug lead off.....
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Jul 16, 2007 17:00:36 GMT
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shocks could be soft which reminds me of something else, lowered 3/4/5 'tinas can suffer with the front shocks breaking out of the front wishbones.
Rubber bush in the column can get soft as well, if the brakes are ok and its weaving it could have some movement in the front wishbones, its possible the bolts or holes he bushes sit in are worn.
could also be an effect of the camber/caster cahnge from lowering it.
Cortina frontbrakes are poo at the best of times, capri discs and calipers fit them though so plenty of choice for uprating them, just be aware if you fit big multi piston calipers they can hit the wishbones when you steer lots.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Jul 16, 2007 17:16:27 GMT
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sounds like the rack bushes have gone soft had a few do this , my 2 door is no exception plus it getts a bit of a wheel wobble on under braking ;D
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Jul 16, 2007 18:05:03 GMT
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sticky caliper/s steeering rack - or rack bushes ball joints track rod ends
or all of the above
one final thought - as its got a complete set of poly bushes - has the steering geometry been set up properly?
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Someone just shot the elephant in the room.
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Jul 16, 2007 18:48:53 GMT
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klunk
Part of things
1949 Rover P3 V8
Posts: 371
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Jul 16, 2007 21:18:33 GMT
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I have Tincorna front suspension including brakes on my Rover. It too does a bit of a wander under hard braking. I have assumed it to be a sticking piston. It's on my 'to do list'. There was a company doing refurbed calipers on exchange for about £25.00. Only problem is, I con't remember who!!
Possibly Burton Power??? Worth a try though.
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if you find out let me know.
I was planning on going down the tried and tested Granada calipers and Capri vented discs route.
Tyres are newish low profiles, so sidewalls not an issue (205/45x15 or something.)
Dave (and others) sugesting a slightly sticking piston may be on the right track.
No idea as to the camber and caster settup since it was lowered as I bought it like this. Anyone got some recomendations for these? Or stick with the factory geometry?
I'll also check the rack bushes but I think these are Deflex as well.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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if you find out let me know. I was planning on going down the tried and tested Granada calipers and Capri vented discs route. Tyres are newish low profiles, so sidewalls not an issue (205/45x15 or something.) Dave (and others) sugesting a slightly sticking piston may be on the right track. No idea as to the camber and caster settup since it was lowered as I bought it like this. Anyone got some recomendations for these? Or stick with the factory geometry? I'll also check the rack bushes but I think these are Deflex as well. if you intend using the Granada calipers ( which would need a adapter plate, or use the granada hub) why not use mondeo discs and calipers - i think you need to machine the hub hole in the disk for this conversion - you want more info i can find out how much metal needs to be removed ( seem to remember its 1.7 mm - but don't quote me)
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Someone just shot the elephant in the room.
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I was goig to use spacers and the Cortina hub.
I am interested in the Mondeo based option. Do the Mongdeo calipers fit right up to the mounting on the Cortina stub axle?
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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I was goig to use spacers and the Cortina hub. I am interested in the Mondeo based option. Do the Mongdeo calipers fit right up to the mounting on the Cortina stub axle? again ' i think so' ;D - but i ll find today - and the machining details - the mondeo option gives efficient braking and parts are easy to find and cheap the granada caliper is a larger size and the fixing holes are in different place to a cortina one
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Someone just shot the elephant in the room.
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