Jounce washer?

[ron350]

Jounce washer?

 

Reading old postings about front strut problems and ran across this.

 

http://www.w-body.com/forum/index.php/topic,35426.0.html

 

What is a “jounce washer†and where does it go?

 

[DiscoStudd]

It's called a "Jounce Bumper." It's what keeps your struts from bottoming out against the strut mounts.

 

Here's what I assume is a Gabriel jounce bumper (the "red" piece on the strut shaft) :

 

 

The jounce bumper on the KYB rear strut boots is integral, and mounted on the top of the boot. It actually plugs right into the upper strut mount.

 

The front jounce bumper is beneath the upper strut mount (sorry, no pics.)

[ron350]

I think Daklin was talking about something else.

 

Double check with someone locally, GM issued a TSB on this problem a few years ago, if you are looking for a cheap fix, the TSB mentions simply installing a jounce washer to correct this due to improper spacing between the knuckle/strut assembly and the bearing plate. Sorry can't recall TSB number, if I can find it I'll let you know. I had mo local GM dealer do this to my Cutty and it fixed the noise perenantly. Not sure how it happens and it doesn't happen to all of them. My boss at Delphi (Worked in struts at the time the W was in production) happened to mention this to me BEFORE I put a new bearing plate on mine. The jounce is only like a few dollars and available from your local parts guy.

 

Here is the TSB number:

53-33-07B JUL 98

 

 

[DiscoStudd]

Aah, gotcha.

 

N/M, then...

[ron350]

 

TSB with part # from Donrome at Club GT.

 

 

http://www.clubgp.com/newforum/tm.asp?m=3696135&p=1&tmode=1&smode=1

 

 

FRONT SUSPENSION SCRUNCH/POP NOISE #53-33-07B - (Jun 24, 1998)

REVISION: 05/12/97 DIVS INVL 1 2 3 4 7

 

THIS BULLETIN IS BEING REVISED TO ADD THE 1997 MODEL YEAR FOR Error! Hyperlink reference not valid. AND OLDSMOBILE AND TO REVISE PART NUMBER INFORMATION. PLEASE DISCARD CORPORATE BULLETIN #53-33-07 (SECTION 3 - STEERING/SUSPENSION). ______________________________________________________________________

 

REVISION: 06/24/98 DIVS INVL 1 2 3 4 7

 

THIS BULLETIN IS BEING REVISED TO ADD THE 1998 MODEL YEAR FOR CHEVROLET. PLEASE DISCARD CORPORATE BULLETIN #53-33-07A (SECTION 3 - STEERING/SUSPENSION). ______________________________________________________________________

 

SUBJECT: FRONT SUSPENSION SCRUNCH/POP NOISE (INSTALL FRONT SUSPENSION JOUNCE WASHER)

 

MODELS: 1994-96 BUICK REGAL 1994-98 CHEVROLET LUMINA 1995-98 CHEVROLET MONTE CARLO 1994-97 OLDSMOBILE CUTLASS SUPREME 1994-96 Error! Hyperlink reference not valid. GRAND PRIX

 

CONDITION:

 

SOME VEHICLES MAY EXHIBIT A SCRUNCH/POPPING TYPE NOISE COMING FROM THE FRONT OF Error! Hyperlink reference not valid. THAT IS APPARENT DURING LOW SPEED TURNING MANEUVERS.

 

CAUSE:

 

SLIP-STICK CONDITION THAT OCCURS BETWEEN FRONT SUSPENSION STRUT BUMPER AND FRONT STRUT CLOSURE NUT.

 

CORRECTION:

 

INSTALL A FRONT SUSPENSION JOUNCE WASHER, P/N 10403367, ON EACH FRONT STRUT ASSEMBLY FOLLOWING SERVICE PROCEDURE INDICATED BELOW:

 

SERVICE PROCEDURE -

 

CAUTION:

DO NOT PERFORM THIS SERVICE PROCEDURE UNLESS THE WEIGHT OF THE VEHICLE IS ON THE SUSPENSION. THE WEIGHT OF THE VEHICLE KEEPS THE COIL SPRING COMPRESSED, OTHERWISE THE RELEASED COIL SPRING COULD CAUSE PERSONAL INJURY.

 

1. SCRIBE STRUT COVER TO BODY TO ASSURE PROPER CAMBER ADJUSTMENT.

 

2. REMOVE STRUT MOUNT COVER BY REMOVING THREE COVER NUTS.

 

3. REMOVE STRUT SHAFT NUT USING NO. 50 TORX BIT AND NUT REMOVER/ INSTALLER, J-35669.

 

4. REMOVE STRUT MOUNT INSULATOR BY PRYING WITH A SUITABLE TOOL.

 

5. ATTACH STRUT EXTENSION ROD, J-35668, AND REMOVE STRUT BUMPER.

 

6. INSTALL JOUNCE WASHER, P/N 10403367, AS SHOWN IN ILLUSTRATION, AND SNAP INTO POSITION OVER STRUT CLOSURE NUT.

 

7. INSTALL JOUNCE BUMPER.

 

8. RAISE STRUT SHAFT AND REMOVE STRUT EXTENSION ROD, J-35668.

 

9. INSTALL STRUT MOUNT INSULATOR.

 

- USE A SOAP SOLUTION TO LUBRICATE INSULATOR FOR EASE OF INSTALLATION.

 

- IF NECESSARY, INSTALL J-35668 AFTER INSULATOR IS PARTIALLY INSTALLED AND POSITION STRUT AS REQUIRED TO ASSIST IN INSULATOR INSTALLATION.

 

10. INSTALL SHAFT NUT USING NO. 50 TORX BIT AND NUT REMOVER/ INSTALLER, J-35669.

 

11. TORQUE SHAFT NUT TO 98 N.M (72 LB FT).

 

12. INSTALL STRUT MOUNT COVER AND NUTS, ALIGN SCRIBE MARKS AND TORQUE COVER NUTS TO 33 N.M (24 LB FT).

 

13. REPEAT STEPS 2 THROUGH 12 FOR FRONT STRUT ON OPPOSITE SIDE OF VEHICLE.