MadMax

How often should front wheel bearings be replaced on a 944 S2 w/o M030? What has to be done to do it and how involved is it? I am planning on replacing my front rotors with some (Cast Drilled) Cross drilled rotors from Vertex and metal masters pads and I would like to change the bearings at that time, if necessary. I have 78K on my car and I don't think the bearings have ever been replaced.

Thanks,
Max

White951

I'm not sure that there is a replacement time but I do believe they should be repacked every 30k miles. As long as there is no play in the wheel I would think they are OK. Lets see what someone else says. If it needs to be replaced it is easy, just like a repack. Remove caliper, remove grease cover, remove the rotor and out it should come. Easy step by step in the Haynes manual.


John
86 951

Rog

Hi,

First, ditto on the 30k repack. Its worked well enough for me that I've never had to replace wheel bearings on a car below about 150k miles.

The outside front bearing is a tapered roller, so all you have to do is lightly snug it back down to compensate for wear.

No if there is any pitting on race or rollers,or graininess/gritiness in rotation, its time to replace.

Cautionary - don't spin brand new bearing when dry. Believe it or not, it can lead to minute surface defects which propogate out to real problems later.

Clean
Inspect
repack
replace only if needed
resnug
drive

hth
roger