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Coupes & Convertibles Mazda RX-8 Mazda RX-8 Care & Maintenance
104 messages, Last post on Dec 03, 2009 at 2:18 PM
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Had to prepare for a trip to Disney World (!!!).....and needed new tires.... I purchased 4 new Portenzas - $225 each....from the dealer.....plus got an alignment. The rubber has made the car 'feel' like new again. I had gone 30K miles on then 1st set - including a 5700 mile trip around the USA!......my observation is that these are great tires! The old tires had worn in a nice even pattern across all 4 tires - basically almost bald. With my South Florida location, all this rain was making for some slippery driving! |
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Replying to: cheezeboy (May 17, 2004 3:49 pm) |
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yes I did find out what it was......2 things really 1) slight rotor problem with the back right wheel, in which the dealer 'shaved' the rotor 2) since my "tour de usa", I've warped my front two rotors! to solve the second problem, I have to bring in car for a complete brake job - which is fine because I DID the damage driving like a nut-case!! but it's hard not too in this lovely machine!! also, I am gonna see if I can wait another month and a half before I do this - I want to send the $ to the hurricane relief fund....I can live with this for awhile!....
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Replying to: cheezeboy (Sep 03, 2005 6:48 am) A little trick I use to avoid replacing those "junk" too thin rotors manufacturers give us!
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Replying to: pathstar1 (Sep 03, 2005 10:07 am) I always try to take the wheels in via another car when I need work, or if I can't I loosen the lugs when I get home and re-do them with a hand torque wrench. Dennis
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Replying to: dwynne (Sep 03, 2005 11:41 am) What actually warps the rotor is when they torque to full value the first nut, then do the next, the next, etc. The wheel tends to not centre properly on some vehicles, and when the first nut is torqued down, it holds the wheel off-centre enough that when they torque another the wheel acts like a wedge pressing against the edge of the rotor hat. This can slightly bend the rotor hat on one side on some vehicles - not all are suseptable, explaining one reason why some vehicles are more prone to warping than others. For those that don't get into this, the rotor hat is the part that holds the brake rotor to the wheel hub. Sometimes it's one piece with the hub, sometimes it's a separate piece. The solution, or way to avoid rotor warping from this cause, is to hand tighten all nuts first. Then use three tightening passes, first at 10% or so final torque, next at 60% or so final torque, and the last at full torque, always moving across the stud circle to do the next nut. This is what I have always done, after noticing the wheel can get offset if you torque the first one without the others tight. I've found that generally, differential heating and poor installation are about equal in cause of warping on suseptable vehicles. Not all will warp from poor installation, and not all will warp from differential heating, though, so the #1 cause will vary from vehicle make/model to vehicle. |
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as always, thanks for the info! People like you make this forum the greatest!!! and if driving 90+mph on a mountain pass (at midnight), then braking hard to avoid a big owl in the middle of the road, then sitting for 5 min or so, to catch my breath, qualifies for "classic rotor warping" - I am guilty of that! |
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Replying to: tjjjr2 (May 11, 2005 3:51 pm)  Dealership in NC told me today that Mazda is OK with them using 5w30 oil in our area. I am still a bit concerned that this is going to make my gas mileage worse. (I'll be checking even more carefully)
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Anyone experience an engine squeek which is most audible when the car is warm and idling? Had the dealer check it out yesterday and they tell me that it is a normal noise from the oil pump? Supposedly there is no prior information regarding this problem and the Mazda techs told the dealer that this noise is more noticable on some RX8's than others but that it is normal? At the dealer we had the car up on the rack. The engine mounts checked out, and belt lube did nothinig. I have been next to other Rx's at the gas station and not heard those vehicles making this squeek. Any thoughts? My RX8 is a 2004 and I have had problems with transmision failure, warped rotors, and battery failure. |
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Replying to: wpavlik2 (Sep 07, 2005 4:21 pm) I believe I will be taking it somewhere else to get it changed again and put 5w20 in. I'm rather annoyed by the whole thing. Anyone else had this happen? I have to wonder if the folks getting the really bad gas mileage are having 5w30 put in without their knowledge?
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