Question regarding testing used Bilsteins before installation

[CubbyChowder]

I just have a quick question. I am parting out a 325is with Bilstein Sports front and back, and I am planning on selling them as a set, but want to make sure 100% that they are good to go before I sell them. The rears are almost brand new so I know they're good, but the fronts are kind of a different story.

For the fronts, they are two different part #'s, one is the F4-P36-0335-H1 and the other is the F4-P36-0335-H0, which after some research I found out they are essentially the exact same strut with the same valving, rebound, etc.

When I compress them, one seems to compress slightly easier and rebounds quicker, the other is a tiny bit harder to compress and rebounds slower, but they both compress/rebound smoothly and consistently. Should I consider these ready to go? I don't want to sell someone a "good, usable shock", when really it's not. Honest answers would be appreciated!

[AndrewBird]

If there are no visible signs of leakage and they return to full length after being compressed, I would say they are good.

[CubbyChowder]

So I removed the inserts from the housings today and got to inspect them more. With the collar nut removed, there is a small amount of grease on the shaft during rebound. And one shock is actually significantly easier to compress and it sounds like there is an air leak coming from the bottom silver cap where the bump stop is. What do you think?

[CubbyChowder]

bump

[acolella76]

Sounds like one is leaking. If you compress it quickly is there any clunking? Can you feel anything when it changes directions?

[ForcedFirebird]

You have one HD and one Sport for the front dampers.

[CubbyChowder]

Sounds like one is leaking. If you compress it quickly is there any clunking? Can you feel anything when it changes directions?

That's what I thought too. No clunking, it's all smooth. One is just way easier to push in

You have one HD and one Sport for the front dampers.

Are you sure? Every source of info that I am finding is telling me that they are valved the same and are essentially the same exact shock. Come to think of it, I remember reading that HD's and sports are actually valved that same, so I guess what you're saying could make sense.

[ForcedFirebird]

Are you sure? Every source of info that I am finding is telling me that they are valved the same and are essentially the same exact shock. Come to think of it, I remember reading that HD's and sports are actually valved that same, so I guess what you're saying could make sense.

Yes, 100% sure. Ordered and installed countless NIB Bilstein shocks/dampers at the shop.

[AndrewBird]

Isn't the only difference between HDs and sports is that the shaft on sports is shorter?

[acolella76]

The Sport has a shorter extended length than the HD to accommodate shorter springs. Valving between the HDs and Sports is the same.

[AndrewBird]

That's what I thought. Shorter shaft means shorter extended length, given the same body length.