What is the "larger front strut housing?"

#1

Can someone explain this pls?

9.3.8.13. Updated (larger) front strut housing, BMW part number 31 31 1 127 315/6 are permitted.

I think that this rule has been around for a while. I just don’t know what it’s talking about.

#2

as far as I can tell (RealOEM.com) that’s the normal part number from 1986-1991 for the 325 so I’m as confused as you

#3

Seems like I remember something about 318s having a narrower strut housing. Even though they are phased out, I suppose the rule still works in case someone wants to use a 318 tub?

#4

I think the smaller struts were on the 84-ish cars.
bruce

#5

I just wanted to clarify, that since I have a 1987 325is I have the smaller strut housings and should order part number P30-0334 Bilstein shock inserts. Thanks.

#6

No, you should have the struts that virtually everyone else has, the later, larger struts, and will want shock insert, PN P36-0335.

#7

Hmm that seems to contradict what I read here which is where my confusion came from:

http://www.unofficialbmw.com/e30/suspension/e30_shock_tips.html

This thread helps clear it up:

http://www.e30tech.com/forum/showthread.php?t=51988

It would be nice if the rules made it simpler to understand instead of just listing 2 different part numbers for the front. Thanks for clearing it up more.

#8

we may just remove the reference to the smaller strut housing next time. Feel free to suggest revised text for rules.
cheers,
bruce

#9

My recollection was that the smaller (45mm) strut housing was used on non-abs (early) cars.

Probably a good idea to keep the rule, but perhaps re-phrase it:

"45mm strut housings may be replaced by 51mm strut housings (BMW part 31 31 1 127 315/6)