dguy

Bilstein B4 Rear Shocks

5 posts in this topic

G'day,

 

Has anyone who has installed Bilstein B4 OE Replacement rear shocks (24-126793) on a 451 run in to fitment issues? 

 

Other than the requirement to re-use the upper nut, washer, and bushing from the original shocks they appear to be a drop-in replacement, however this was not the case for the set which I installed on the weekend.  When the upper nut is tightened down the "hat" at the top of the dust shield does not sit firmly in the frame recess unless the suspension remains loaded.  There is about 3-5mm of free play at the top of the shock and a significant rattle each time the suspension unloads & re-compresses.

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I suspect you have not fitted it correctly. 

Suggest you view below video:

 

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Thanks Tolsen, there is one key difference between what that video demonstrates and how my work went.

 

In the video, the dust shields which were transferred on to the KYBs appear to have a beefier top plate than the shields which were supplied with the Bilsteins.  If the Bilsteins had a taller top plate on the shield, or a bushing installed between the top plate and the frame my issue would be solved.  I'll have to look at the old shocks again, perhaps there is some material on their shields which needs to be transferred to the new shocks but I don't remember noticing anything.

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Rear Shock Fitting:

 

First fit bump stop, dust sleeve, short pipe and special  rubber piece containing metal cap onto shock absorber shaft. 

 

Then fit shock into suspension. 

 

Fit bolt and nut to secure bottom end. Note not to tighten bolt and nut before you have the car on the ground with full weight on spring or place axle stand under deDion tube to achieve same. 

 

Top mount continued. Fit rubber piece followed by large washer and nut. 

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58 minutes ago, tolsen said:

First fit bump stop, dust sleeve, short pipe and special  rubber piece containing metal cap onto shock absorber shaft.

 

That was the missing piece, thanks.  The supplied installation instructions used more pictograms than words, none of which (to my eyes, at least) indicated that this component also had to be replaced with new or salvaged from the old shocks.

IMG_20180820_1803171~2[1].jpg

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