hehe vr4 surgery is the best surgery

4 in 12months wow didnt know there was that many around in ad.

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

picked up a EGR Valve tonight



gonna be fun to install this
wish i had a stock vr4 galant as reference for all the emission vaccum hoses
and solenoids etc :/

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

You can plumb it the same as the 62..........it should work well as it only requires to be plumbed just behind the throttle plate, using the top nipples.

I can find you a wiring diagram of which solenoid (and wiring) controls its function...........stay tuned.

yeah think this one is of a n/a 4g63 only got one nipple,
do the 4g63t ones have 2 nipples?

also think i may need a wastegate solenoid as far as i know i dont have one in my loom.

thanks man

did mass google came up with this page
found it quite helpful for the vr4 side of things
http://www.4gtuner.com/topic/3662-works ... vr4-turbo/
click on the new link
so many manuals for vr4 be quite helpful
only thing is from America and dunno if evthing would be the same
but its a good read and my emissons stuff is in there, just gotta work out which is the right version
dunno if people have already but all in pdf format. will be heaps helpful, if the american version are the same.

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

got stuck into the brakes today
removed the left hand side (passenger side) rear caliper to investigate the prob
the handbrake cable was fun to get off :/ lost our long nose pliers at wreckers few weeks ago
wouldve killed for some today


finally got it off the sliders seem fine, gonna overhaul them soon gotta get the kits,
im guessing maybe piston is stuck or something, will remove it tomoz hopefully.
also hooked up the front magna calipers i removed to prevent the brake fluid draining and getting moisture in the lines

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

Mark,
Be careful when you remove the piston.......the rears don't slowly move out with pressure they actually turn.

Just in case you weren't aware.

hmm wish i saw this note earlier, just removed like normal ones, bit of compressed air hmm and
and a flat screw driver to start them.
prob stuffed the handbrake mech thread now? dammit
are you spose to twist them by hand?



piston seem ok large deep scratch at the top all way round almost, prob from me removing it wrong


Disc seems ok

min 8.4mm still measures 10mm

hmm wonder what the prob is ??? i wonder if the line is blocked (as coop1er said) come to think of it wasn't much fluid in the caliper :/

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

That should still be ok.........check the bleed nipple is free from road grime when you bleed.........if the line is blocked (no fluid squirting from nipple) you may have to check the bias (under the booster) for blockage.

I'm rebuilding the same calipers at the moment. Once you remove the bolt from the handbrake bracket on the caliper, take the bracket off, you should be able to use a 10mm spanner to unscrew the piston out. It's clockwise for one side and anticlockwise for the other.

Are you going to hone the bore before you reassemble?

Usually. I just put the seal kits on and new
Pistons if needed. Prob b a good Idea though. What
U gonna do on urs?

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

There shouldn't be any need to hone the bore because the piston seal sits in a recess in the bore with the piston sliding past the piston seal. So the piston must have an excellent surface, but the bore is not important for sealing.

oh ok kool, thanks for the info coop1er

today got the seal kits for the rear TM Magna calipers
and 2 new pistons, haven't checked the other piston yet, prob ok (passed the braking test on drivers side) just gonna replace it anyway

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

How much did the new pistons cost you? I wasn't aware you could even get new pistons.



Ok this will save me some time then. I've honed a clutch master cylinder before but i've never rebuilt a caliper so wasn't sure if it was necessary. Cheers for the info.

I suppose then it doesn't really matter what piston goes back into what caliper. Could you put the left piston into the right caliper with no problems? I wouldn't do this anyway...just curious.

I reckon theyd prob be interchangeable
Looks like same part number. Prob doesn't matter
With new ones, but if using old ones maybe wear different dunno. So prob
Best to put back the same.

The pistons were round $46.00ea and seal
Kits were round $33ea from abs, dunno if that's
Normal price or not cos I buy bit of stuff from
There and they know my dad. But the pistons don't
Come with the thread for handbrake or clip
Hopefully mines still ok.

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

$46 is a good price. Repco quoted $90 each and peps $70. But i did get the seal kit from repco for $27 each.

Don't know if i want to spend $140.

Yea true I only got new pistons cos the one
On the left side failed the brake test, and not
100 percent what the prob is. Hopefully overhauling
And new piston will solve it. Doing the otherside too
Have to take off anyway to match the gold paint on
The fronts.

The vr4 twin pots I overhauled before I used
The old pistons they were great condition just
Needed a really fine wetrub. If no deep scratches
Or they haven't started pitting they should be alright.
Glad I didn't needed vr4 caliper pistons that may have
Cost a bit

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

Thursday night grabbed some standard front springs of clueless (thanks heaps again)
to jack the front a bit to legal height


today stripped the caliper apart


cleaned the inside of it out, still looks mucky hopefully fine wet rub will get rid of it


also one of the sliders looks fairly worn/pitted might get a new one.


stripped the old paint off


gave it first coat of the same gold as the front vr4 calipers, might give it few more

_________________
*81 GH Sigma*
*85 GK GSR Sigma - 2.6L, 4G54, 71.6rwkw, NA pig, TR magna EFI conversion and computer, lumpy crow cam*
*85 AB GSR Cordia - 2.0L, Gen 1 DOHC 4G63, 116.33 fwkw, 13psi ,Stocker TD05H 14B Turbo, Stocker computer, needs work to slow*

Driving a Cordia is not a Crime

Love the gold bud, just bought some gold VHT caliper paint to paint my vr4 calipers before they go on...

_________________
87 Cordia Turbo with a Pulse
3" Exhaust, Front Mount, Bov, Boosted 10psi
SOLD my baby

Nice to see the front springs still have the "bull dust"..........I thought Grant might have cleaned them for you.

I thought the bull dust gave the springs the authentic feel of a 27 year old car