Teves leaking

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Teves leaking

Postby thunderjet » Wed Feb 26, 2014 1:18 pm

Well I went out to the Mark today and was greeted by a ten inch puddle of brake fluid under the drivers seat. I checked for brake line leaks and found none. Plus no lines run under the drivers seat. Turns out the Teves unit is leaking from what appears to be the pump seal. Badly. It lost about a whole can of break fluid overnight. Is it possible to replace the seal on the pump or does the entire unit have to be rebuilt? I can't seem to find separate parts for th he unit, only whole rebuilt units for about $900. If that's the only option I'll just replace the Teves with standard power brakes earlier than I planned.
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1988 Thunderbird LX: 306, Edelbrock Performer heads, Edelbrock Performer RPM intake, 70mm TB, 80mm PMAS slot MAF, 30lb injectors, Comp 266HR cam, FRPP 1.6 roller rockers, FRPP shorty headers, 2.5" dual exhaust, AOD with 2800 PI Stallion converter, 3.73 Traction-Lok.
Other rides: 2011 Focus in blue flame, 2012 Mustang 3.7 in grabber blue, 2017 Honda Accord EX-L V6
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Re: Teves leaking

Postby CDW6212R » Wed Feb 26, 2014 5:19 pm

Can you narrow down the leak, to say the switch at the pump? That I gather is relatively easy to change.
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: Teves leaking

Postby thunderjet » Wed Feb 26, 2014 7:59 pm

CDW6212R wrote:Can you narrow down the leak, to say the switch at the pump? That I gather is relatively easy to change.


I cleaned it up and sure enough the pressure switch is leaking, not the pump motor. So now I just have to locate one. That should be fun.
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1988 Thunderbird LX: 306, Edelbrock Performer heads, Edelbrock Performer RPM intake, 70mm TB, 80mm PMAS slot MAF, 30lb injectors, Comp 266HR cam, FRPP 1.6 roller rockers, FRPP shorty headers, 2.5" dual exhaust, AOD with 2800 PI Stallion converter, 3.73 Traction-Lok.
Other rides: 2011 Focus in blue flame, 2012 Mustang 3.7 in grabber blue, 2017 Honda Accord EX-L V6
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Re: Teves leaking

Postby CDW6212R » Wed Feb 26, 2014 10:32 pm

Someone here found a new one I think was listed for a GM car. It was mentioned in a thread last year and I believe it worked. I think there was a link there to get it.

The issue seems to be the sealing of the switch, whether it's a gasket, threads etc. I'd like to know what's going on there also, so we can fix it instead of hunting new or other used parts. Regards,
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: Teves leaking

Postby jcurry » Thu Feb 27, 2014 1:38 am

Contact Tom Curry at http://www.lincolnmarkviiparts.com/ I'm sure he has what you need.
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Re: Teves leaking

Postby thunderjet » Thu Feb 27, 2014 4:07 pm

I was able to source a brake pressure switch locally. It's an AC Delco part number 25530882 http://www.amazon.com/ACDelco-25530882- ... B0010GFRD8. It pays to know someone who runs a parts store. I got it for $69.95 :D .

I have no idea why the old one is leaking. Fluid appears to be leaking just from the switch and running down to the bottom of the master cylinder. From there it runs down the firewall and onto the front subframe where it drips off right under the driver's seat area. It looks like the switch is leaking from the top and not where it seals to the master cylinder itself as the electrical connector is covered in fluid. I refilled the reservoir yesterday and it was still full this morning (I let the car sit overnight). The leak has slowed to almost nothing, even with a full reservoir. Kind of odd.
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1988 Thunderbird LX: 306, Edelbrock Performer heads, Edelbrock Performer RPM intake, 70mm TB, 80mm PMAS slot MAF, 30lb injectors, Comp 266HR cam, FRPP 1.6 roller rockers, FRPP shorty headers, 2.5" dual exhaust, AOD with 2800 PI Stallion converter, 3.73 Traction-Lok.
Other rides: 2011 Focus in blue flame, 2012 Mustang 3.7 in grabber blue, 2017 Honda Accord EX-L V6
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Re: Teves leaking

Postby CDW6212R » Thu Feb 27, 2014 5:47 pm

That one sounds like an internal leak, like the recalled brake switches on master cylinders. Replace that one, good find on the part locally.

I don't think the ABS switch normally leaks that way(internally), or else others have been misdiagnosing theirs as the seal/base/threads etc. I wonder if any electricity can reach the fluid, like the worrisome MC switches, which are fire hazards due to constant power at the connectors.
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: Teves leaking

Postby thunderjet » Fri Feb 28, 2014 7:53 pm

I picked up the AC Delco part number 25530882 brake pressure switch today. I'll put it on either Monday or Tuesday when I can get over to my friend's place (he has a heated garage, I don't). For future reference this is what the part looks like. It even has the Ate logo on it so it's more than likely a Teves part in an AC Delco box.

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1988 Thunderbird LX: 306, Edelbrock Performer heads, Edelbrock Performer RPM intake, 70mm TB, 80mm PMAS slot MAF, 30lb injectors, Comp 266HR cam, FRPP 1.6 roller rockers, FRPP shorty headers, 2.5" dual exhaust, AOD with 2800 PI Stallion converter, 3.73 Traction-Lok.
Other rides: 2011 Focus in blue flame, 2012 Mustang 3.7 in grabber blue, 2017 Honda Accord EX-L V6
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Re: Teves leaking

Postby CDW6212R » Fri Feb 28, 2014 8:46 pm

Excellent buy, and the ATE products are excellent. I like their brake fluid too.
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: Teves leaking

Postby thunderjet » Wed Mar 05, 2014 4:04 pm

I installed the part and the brakes are working fine again with no leaks. If anyone is interested the AC Delco part I used is exactly the same as the OEM part I removed from the Teves II unit. So if you need a new pressure switch the AC Delco unit I used is the cheapest and easiest to find solution to the problem.
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1988 Thunderbird LX: 306, Edelbrock Performer heads, Edelbrock Performer RPM intake, 70mm TB, 80mm PMAS slot MAF, 30lb injectors, Comp 266HR cam, FRPP 1.6 roller rockers, FRPP shorty headers, 2.5" dual exhaust, AOD with 2800 PI Stallion converter, 3.73 Traction-Lok.
Other rides: 2011 Focus in blue flame, 2012 Mustang 3.7 in grabber blue, 2017 Honda Accord EX-L V6
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Re: Teves leaking

Postby thunderjet » Thu Mar 06, 2014 1:39 pm

No leaks after driving it around for a couple of days. The new pressure switch has actually improved braking performance. The car stops better than it did even before it started leaking. Perhaps the switches wear out over time?
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1988 Thunderbird LX: 306, Edelbrock Performer heads, Edelbrock Performer RPM intake, 70mm TB, 80mm PMAS slot MAF, 30lb injectors, Comp 266HR cam, FRPP 1.6 roller rockers, FRPP shorty headers, 2.5" dual exhaust, AOD with 2800 PI Stallion converter, 3.73 Traction-Lok.
Other rides: 2011 Focus in blue flame, 2012 Mustang 3.7 in grabber blue, 2017 Honda Accord EX-L V6
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Re: Teves leaking

Postby CDW6212R » Thu Mar 06, 2014 3:50 pm

The ABS switch is triggered by a low pressure level, and it shuts off the pump at a certain high pressure. It's possible that different switches will have noticeably different pressures low/high where they activate/deactivate. You may have a bit higher pressure now in the system.
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: Teves leaking

Postby 1990blacklsc » Fri Mar 07, 2014 12:40 pm

Is your switch leaking yet? I have the same issue. I had swapped one out from another unit, and that worked for about 6 months. I guess they do wear out. I just wonder what part leaks. Since there is an o ring, that would mean anything that gets by would leak, right? But what is with the hole that is by the threads? Is that like the hole for a water pump, that one it goes bad it has a place to leak out?
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Re: Teves leaking

Postby thunderjet » Fri Mar 07, 2014 7:24 pm

4 days and no leaks. I did use a brand new switch however. Perhaps the O-ring on the used switch wore out? If the O-ring on the used pressure switch was exposed to brake fluid and then it dried perhaps it made the O-ring brittle?
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1988 Thunderbird LX: 306, Edelbrock Performer heads, Edelbrock Performer RPM intake, 70mm TB, 80mm PMAS slot MAF, 30lb injectors, Comp 266HR cam, FRPP 1.6 roller rockers, FRPP shorty headers, 2.5" dual exhaust, AOD with 2800 PI Stallion converter, 3.73 Traction-Lok.
Other rides: 2011 Focus in blue flame, 2012 Mustang 3.7 in grabber blue, 2017 Honda Accord EX-L V6
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Re: Teves leaking

Postby 1990blacklsc » Sat Mar 08, 2014 12:46 am

I bought the same switch today from Amazon. $86.00 shipped! Looks and sounds good. I wish you luck with yours. And as long as yours holds up then you found a port hole for all of us. Walt
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Re: Teves leaking

Postby thunderjet » Sat Mar 08, 2014 12:57 pm

Hopefully it works for your car as well. I'm going to start gathering parts so when the Teves unit on my Mark craps out (ie the $900 rebuild is the only option left) I can convert it to regular power brakes.
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1988 Thunderbird LX: 306, Edelbrock Performer heads, Edelbrock Performer RPM intake, 70mm TB, 80mm PMAS slot MAF, 30lb injectors, Comp 266HR cam, FRPP 1.6 roller rockers, FRPP shorty headers, 2.5" dual exhaust, AOD with 2800 PI Stallion converter, 3.73 Traction-Lok.
Other rides: 2011 Focus in blue flame, 2012 Mustang 3.7 in grabber blue, 2017 Honda Accord EX-L V6
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Re: Teves leaking

Postby 1990blacklsc » Sat Mar 08, 2014 8:03 pm

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Re: Teves leaking

Postby 1990blacklsc » Sat Mar 08, 2014 8:06 pm

I'm posting this for some of you guys that have this kind of money laying around, I don't
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Re: Teves leaking

Postby oldschool1 » Sun Mar 09, 2014 3:59 am

ImageImageImageImageImage

http://thelincolnmarkviiclub.org/Gallery/E8SZ2C256A-LINCOLN-MARK-VII-ABS-BRAKE-ACTUATOR-PUMP

Nice find. This is actually worth the asking price.

If you drove the car only once per week from 1992 to today, that's 22 years or 1144 weeks or a minimum of 2288 times the pump has been turned on and off. In the life of a pump that generates over 2000 punds of pressure, thats a LOT of usage. The original assembly worked fine for 22 years. When someone buys this one and installs it and gets ten trouble free years out of it, it's worth the price.

p.s. I also do not have $500.00 of disposable income just laying around :)
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Re: Teves leaking

Postby CDW6212R » Sun Mar 09, 2014 11:46 am

That eBay seller isn't the most ideal or helpful seller, but he has some good parts sometimes.

I bought a new memory seat switch from him, for my Mark VII. He had one listed for the Mark VII, and I did the research to figure out that what he described was a Mark VIII part. But along the way I also found out that the back mounting of an 88-92 Continental switch matched our left door trim "pocket." We do have a space which will accept that switch. I just have to piece together the other 99% of the feature parts(my choice from a 95-97 Town Car).
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: Teves leaking

Postby 1990blacklsc » Sun Mar 09, 2014 3:07 pm

Good point oldschool. My Mark is not worthy of that part. If I had a mint garage kept Mark that even still had that new car smell, I would buy this part :o
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Re: Teves leaking

Postby mikeceli » Sat Mar 15, 2014 8:38 am

Looks like the pictured Teves unit has a DEFORMED multiple connector.
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Re: Teves leaking

Postby oldschool1 » Mon Mar 17, 2014 6:33 am

Yup. The seller noted it also.
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Re: Teves leaking

Postby LLFordman » Sun Mar 30, 2014 9:44 pm

thunderjet wrote:I picked up the AC Delco part number 25530882 brake pressure switch today. I'll put it on either Monday or Tuesday when I can get over to my friend's place (he has a heated garage, I don't). For future reference this is what the part looks like. It even has the Ate logo on it so it's more than likely a Teves part in an AC Delco box.

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Hey sweet! Somebody finally bought one and it works..ie is the right one. I found this part number a couple years ago but never had the cash or the immediate need to order one. Great news!
Julian
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1990 Mark VII LSC SE Dark Titanium (sold to a great Mark VII friend)
1991 Mark VII LSC Titanium Frost
1992 Mark VII LSC Deep Jewel Green (sold to a great Mark VII friend)
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2001 Explorer Limited 5.0 Spruce Green


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Re: Teves leaking

Postby lincoln rookie » Fri Jul 04, 2014 7:55 am

Hello all,
I have a leaking pressure switch in my 88 mark VII also.It drips a drop about every 3 seconds when the key is on.
I also hear the pump come on every 10 seconds or so for about 3 seconds when the key is on.this is without
touching the brake pedal.losing about a pint of fluid a day.Can anyone tell me if the switch can be changed
without pulling the unit out of the car and do the brakes need to be bled after changing the switch?
Any advice is appreciated.
One other thing,the part # does not appear to fit a Lincoln,only GM.Someone has successfully
used this switch on their Lincoln I assume?
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