Roadster90 Posted July 16, 2005 Share Posted July 16, 2005 I was speaking to the gentleman who posted the 90 drop top in Ohio for sale this evening, and he stated that there was a service bulletin relating to the Reatta or Rivi brakes concerning a sharp pulling to one side or the other when braking. As he recalled the bulletin called for and he replaced a 1100.00 item which can only be the Teeves. I would really like to view this bulletin if anyone has any knowledge of or knows how to locate it please........thanks,NicIncidently, the drop top he has for sale seems to be a nice driver from his description. Was posted late last week or the 1st of this week. Link to comment Share on other sites More sharing options...
slimpikn Posted July 16, 2005 Share Posted July 16, 2005 this might be what you are looking forBrakes - Intermittent Pull Under Hard BrakingGroup Ref.: BrakesBulletin No.: 315004Date: January, 1994INTERMITTENT PULL WITH A HARD BRAKE APPLY DURING NON-ABS STOP ON ABS EQUIPPED VEHICLES (REPLACE ABS VALVE BLOCK/PRESSURE MODULATOR VALVE)MODELS:1986-90 BUICK ELECTRA1986-91 BUICK LESABRE1988-90 BUICK RIVIERA, REATTA1991 BUICK PARK AVENUE1986-91 CADILLAC DEVILLE, FLEETWOOD1988-90 CADILLAC ELDORADO, SEVILLE1986-91 OLDSMOBILE NINETY-EIGHT, EIGHTY-EIGHT1988-90 OLDSMOBILE TORONADO, TROFEO1986-91 PONTIAC BONNEVILLEEQUIPPED WITH ANTILOCK BRAKESTHIS BULLETIN IS BEING REVISED TO ADD THE 1991 MODEL YEAR FOR "C" AND "H" VEHICLES INCLUDING PART AND WARRANTY INFORMATION. PREVIOUS DIVISIONAL PUBLICATION NUMBERS WERE: DIVISION BULLETIN NUMBER BUICK 90-5-17 CADILLAC T-93-134 GM OF CANADA 315004R OLDSMOBILE 90-T-213 PONTIAC 90-5-19Some owners may comment on intermittent pull with a hard brake apply, but without ABS activation. The intermittent pull can be either to the left or right and only occurs with hard non-ABS stops.This condition may be due to a base brake condition, loose suspension component, or the Antilock Brake System. When working on a vehicle with this condition, use the following procedure:1. Inspect the base brake system. Check for loose or binding calipers, damaged rotors, or restricted brake lines. Refer to Section 5 of the applicable Service Information Manual for complete inspection and repair procedures.2. Inspect the suspension system. Check for loose control arms, damaged struts, or bushings. Refer to Section 3 of the applicable Service Information Manual for complete inspection and repair procedures.3. If nothing is found during the above inspections, replace the AntiLock brake system valve block, (pressure modulator valve for 1991 models). Follow the procedure in the appropriate Service Information Manual. 1986-87 C/H Models Valve Block ......... P/N 25530880 1988-90 C/H Models Valve Block ......... P/N 25533639 1988-90 E/K Models Valve Block ......... P/N 1646523 1991 C/H Models Pressure Modulator Valve ................................... P/N 25559182 Link to comment Share on other sites More sharing options...
Roadster90 Posted July 16, 2005 Author Share Posted July 16, 2005 Tom,,Many, many thanks....need some help here though...am I to take this as the "thing" under the master cylinder or in other words called Mr. Teves???? Link to comment Share on other sites More sharing options...
slimpikn Posted July 16, 2005 Share Posted July 16, 2005 location of what is called Valve BlockOn RH Side Of Brake Hydraulic Unithope this is helpful? i'm in NO way a mechanic!!!!!! Link to comment Share on other sites More sharing options...
Roadster90 Posted January 6, 2006 Author Share Posted January 6, 2006 Thought I would find and repost this as Jim Finn is having a problem with one of his vehicles that demonstrates the enclosed symptoms.....Nic Link to comment Share on other sites More sharing options...
Jim Posted January 9, 2006 Share Posted January 9, 2006 The valve block is the unit mounted on the side of the whole ABS unit mounted on the firewall. The valve block is held to the master cylinder with 4 bolts. You will need to remove the three lines coming out of the bottom of the block. There are "O" rings sealing the passages between the block and the master cylinder. Link to comment Share on other sites More sharing options...
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