mk4 rear calipers on Mk2 GTI

[mykdun]

Has anyone done this conversion?

after reading all a heap of threads on other (UK) forums I decided to do this conversion myself. I bought the MK4 alloy calipers and a pair of 2000 passat rear brake hoses. I thought I'd wait and see what happened with the hand brake cable, most advice is that it needs re-routing and you need a particular handbrake cable from either an early or late Mk2 Golf (much conflicting information)

I installed them today and the only way I could get them to fit was to install the left hand caliper on the right hand side of the car and vice versa. With them installed this way everything looks factory, no need to re-route the hand brake cable. If I installed them the correct way around the hoses didn't reach.

I hope to register this car in a few weeks time and was wondering if the calipers installed this way might cause it to fail its RWC.

Any advice would be appreciated.

[DUB 20V]

ther is a set of goodridge brake lines on ebay.com.au for a aconversin for mk4 rear brakes on a mk2

[h100vw]

You would get brake line and handbrake cable issues with fitting MK3 calipers on MK2s as well.

I forget the exact details now but I do remember remaking the rigid line a bit shorter.

Gavin

[DVR68U]

ive changed my whole rear axle for a rear vr6 one when i did my vr conversion. i think i used mk3 cables and they worked okay, but mine had rear disc's to start with .
cheers brenton

[jayjay]

so who's got mk4 rear calipers for sale? and can you use any mk4 calipers? would gti ones be usable or do you need like gl/cl/ base model ones?

[Golf Loon]

In answer to the original question. I reckon if it looks stock, very few rego places would ever pick it.

The only difficulty you will have will be bleeding the brakes upside down.

[DUB 20V]

so who's got mk4 rear calipers for sale? and can you use any mk4 calipers? would gti ones be usable or do you need like gl/cl/ base model ones?

i do hehehe wanna give me a offer for them they are gti ones?

[mykdun]

The bleeder valves being located on the underside of the caliper is the main thing I was worried about but I'll see what happens at inspection time. The Calipers are marked with an 'L' and 'R' which might give me away but I'll wait and see.

I got the calipers on eBay from the UK, they're off a Seat Leon TDI but they look identical to the Mk4 Golf calipers.

I took a couple photos but it looks like the size restrictions on jpegs mean I can't attach them unless I can find something to shrink them.

[roccodingo]

remove the calipers and chock the pads, then bleed them so the bleeder is at the top if your having trouble getting all the air out, power bleeder helps too !!

[gldgti]

remove the calipers and chock the pads, then bleed them so the bleeder is at the top if your having trouble getting all the air out, power bleeder helps too !!

someones done this before great tip!

to the OP - you may host you images freely on photobucket and link to them here.

[mykdun]

OK, I thought I'd bleed the brakes today and after bleeding each caliper twice the brake pedal still goes all the way to the floor. I'm wondering if the original master cylinder is pushing enough fluid, I'd previously upgraded the front brakes to MK3 Golf (256mm?) and now with the MK4 calipers on the rear maybe I'm asking a bit much of the original master cylinder. I know a popular upgrade is to replace the original with a 22mm master cylinder from a later model, does the extra 2mm really make such a big difference?

[h100vw]

OK, I thought I'd bleed the brakes today and after bleeding each caliper twice the brake pedal still goes all the way to the floor. I'm wondering if the original master cylinder is pushing enough fluid, I'd previously upgraded the front brakes to MK3 Golf (256mm?) and now with the MK4 calipers on the rear maybe I'm asking a bit much of the original master cylinder. I know a popular upgrade is to replace the original with a 22mm master cylinder from a later model, does the extra 2mm really make such a big difference?

I reckon you've got air in the system somewhere. Or the master cylinder seals have flipped inside out. Try bleeding the master cylinder. If it just has 2 outlets, crack the brake lines and press the pedal, nip the line back up with the pedal at the bottom.

Some aftermarket master cylinders have 4 outlets and have 2 blocked off. You should be able to buy bleed nipples to go in the blanks, making the job easier. M10 x 1mm IIRC.

Also, when doing the back brakes you should set the rear bias valve, as though the car was fully loaded, this allows the maximum amount of fluid to the rear.

Gavin

[roccodingo]

I know a popular upgrade is to replace the original with a 22mm master cylinder from a later model, does the extra 2mm really make such a big difference?

YES, you need the extra volume for the larger caliper cylinder volumes.