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"whiring" noise from the rear of my car, particularly noticable around the 70 mph mark or at slow speeds. Seems to be a rotational thing so I'm guessing along the lines of wheel bearings!
Mk1 SC owner here, I've got to get my front wheel bearing sorted for the MOT in the next couple of days. I have a blueprint wheel bearing kit that has the bearing, some grease and a new ring/seal. In the BGB it shows also a new "inner race" and "o-ring" for the hub seal. I was planning on taking it to the local garage (the steering knuckle) to get them to swap it over - will the contents of that kit be suffice? Maybe they have generic o-rings if need be I guess but this is NOT MRT we are talking about.(the one that the BGB suggests taking a hammer and chisel to) making it a two part removal process for the garage - or have these people stripped it down completely ready to press in / out.. and little time!(both on my own) so I know a couple of things about mk1s - but have been out of the MR2 loop for a while and feel rusty (no pun intended) on the mechanical side, and I know virtually nothing about wheel bearings except for what I read in the BGB.'dull whirring' you describe, mine does something very similar (choosing to ignore it for the moment) I don't think it's the bearings though as it only happens while I am 'on the gas' just coasting it seems to dissapear.