2007-10-07 12:52:48 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
The 1997 Jetta has a bleeding sequence of its own. Not only for each wheel, but also for the master cylinder, and also, you have a proportioning valve on the rear of the vehicle. I will never forget the Jetta I tried to bleed. There is only one sequence and if it is not followed, you will never get the air out of the lines. You will chase the air between the rear wheels, the proportioning valve, and the master cylinder. You need to check with VW and see if they will give you the sequence, but I am betting they will want you to bring the car in. The VW's do not have the conventional sequence of passenger rear, driver rear, passenger front, driver front. You can try that, but it is wrong. It is more like the passenger front, then one of the bleeders on the rear proportioning valve, then one of the rear wheels. I don't remember exactly. I do know I was glad to get that car done, and I never wanted to look at another VW brake bleeding job for as long as I live.
2007-10-07 13:59:23 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Prior to installing the master cylinder did you bench bleed it....ie poured in fluid and pumped it until all the air came out THEN installed it into the car?? Usually one of the most common errors in this situation. If you didn't then there could be, as one of many possibilities, air in the line.....Remember air is compressible and you would get 0 line pressure to your wheel cylinders etc. Usually this air remains trapped until you bleed it out. You can remove the fittings at the master cylinder, place a catch pan/rags (and DON'T get it on painted surfaces etc ANYWHERE....glycols remove and blister paint REALLY well) Have someone in the car slowly pump the brakes until you see no more air coming out just as you would bleed at the wheel cylinder. Don't push the pedal too hard or you and everyone around you will get the "geiser" effect. Slow and steady and DO NOT let the master go dry while you are doing this! Keep a NEW bottle of brake fluid nearby and top it up as necessary. Refit your lines without stripping them out and bleed away starting at the farthest point from the MC which is usually the passenger rear and work to the shortest....driver front. Best and hope this helps.
2007-10-07 13:14:54 · answer #2 · answered by PhDOrgChem 2 · 0⤊ 0⤋
Vw Master Cylinder
2016-11-13 20:36:19 · answer #3 · answered by ? 4 · 0⤊ 0⤋
On a power brake system it will be hard when the engine is off as there is no vacuum for the power booster. Some of the newer cars with ABS require a special tool to bleed the rear brakes properly. If your car has ABS that could be the problem. Also did you bleed the master cylinder prior to attaching the lines. If not you probably still have air in the system.
2016-03-19 07:19:06 · answer #4 · answered by Anonymous · 0⤊ 0⤋
97 vw jetta replaces master cylinder bleed brakes pressure brake
2016-02-02 09:38:18 · answer #5 · answered by ? 4 · 0⤊ 0⤋
Keep bleeding until all the air is out, get a clear hose and hook it up to the bleeder valve, like 2 feet long run it into a glass jar with some brake fluid in it, loosen up the bleeder screw, push the brake pedal half way down then let up slowly, keep doing this to get the air out, do this to all 4 wheels, it will take some time but you have to get the air out.
2007-10-07 13:09:59 · answer #6 · answered by Stampy Skunk 6 · 0⤊ 0⤋
Did you bleed brakes properly and completely ? Do you know how to bleed brakes ? Is the master cylinder empty ?
2007-10-07 13:01:54 · answer #7 · answered by tronary 7 · 0⤊ 0⤋
Perhaps the actual wheel brake cylinder is faulty?
Or the hose from the brake line to the actual wheel is with a crack?
Or maybe it was not bled properly in the first place?
2007-10-07 12:57:30 · answer #8 · answered by extitude 5 · 0⤊ 0⤋