Disc runout
Disc runout
However, had them look at the vibration under braking I've had for a while, again no obvious fault but the inspection sheet talks about "disc runout". What is that?
The technician has scribbled a bit, but it looks like it says "advise disc runout check front" - anyone know what that's referring to and what I would need to have done? Picked the car up in a bit of a rush, so might have to ask tomorrow what exactly that means.
Also told me one of my shocks was mildly damp - but they've told me that for a few years now and every year told me it doesn't really need replacing so that's all good
2002 '02' IS200 SE Auto - DVD Satnav with Voice Activation - [COLOR="Blue"]Strathcaron Blue - Parking Sensors - 5000K HIDs with Anti-Glare Bulbs - PIAA 6500K Main Beams - LED Sidelights - Mirror/Sunroof Closure - TTE Styling Kit - 18" Styling Kit Alloys with nitrogen filled Goodyear Eagle F1 Asymmetric Tyres - Bluetouch Multimedia Kit - Gromaudio AUX in - Black painted calipers with silver Lexus decals - 12 LED Dome Light - 96 LED Boot Light - Stainless Steel Sport Sill Plates - PIAA Silicone Wipers[/COLOR]
Just got the car back from a service, technically it sailed through again (great for a 7 year old car) with no work needed other than the service :thumbup1:
However, had them look at the vibration under braking I've had for a while, again no obvious fault but the inspection sheet talks about "disc runout". What is that?
The technician has scribbled a bit, but it looks like it says "advise disc runout check front" - anyone know what that's referring to and what I would need to have done? Picked the car up in a bit of a rush, so might have to ask tomorrow what exactly that means.
Also told me one of my shocks was mildly damp - but they've told me that for a few years now and every year told me it doesn't really need replacing so that's all good
2002 '02' IS200 SE Auto - DVD Satnav with Voice Activation - [COLOR="Blue"]Strathcaron Blue - Parking Sensors - 5000K HIDs with Anti-Glare Bulbs - PIAA 6500K Main Beams - LED Sidelights - Mirror/Sunroof Closure - TTE Styling Kit - 18" Styling Kit Alloys with nitrogen filled Goodyear Eagle F1 Asymmetric Tyres - Bluetouch Multimedia Kit - Gromaudio AUX in - Black painted calipers with silver Lexus decals - 12 LED Dome Light - 96 LED Boot Light - Stainless Steel Sport Sill Plates - PIAA Silicone Wipers[/COLOR]
Garages normally have a special tool to measure this.
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IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
25-06-2016, 09:19 AM #2Disc runout is if the surface of the disc is uneven, e.g. has some higher points and some lower points. So he's recommending that the discs be checked to see if this is the problem on yours.
Garages normally have a special tool to measure this.
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
Mentioned that the disc may not be sitting completely flush with whatever's behind it - it was done at WIM so must have been done right but might take it back to them to give it a once over.
Nope not the pedal at all, vibration is through the steering wheel - never feels unsafe but braking at motorway speed is really uncomfortable and even passengers can feel it through the car.
2002 '02' IS200 SE Auto - DVD Satnav with Voice Activation - [COLOR="Blue"]Strathcaron Blue - Parking Sensors - 5000K HIDs with Anti-Glare Bulbs - PIAA 6500K Main Beams - LED Sidelights - Mirror/Sunroof Closure - TTE Styling Kit - 18" Styling Kit Alloys with nitrogen filled Goodyear Eagle F1 Asymmetric Tyres - Bluetouch Multimedia Kit - Gromaudio AUX in - Black painted calipers with silver Lexus decals - 12 LED Dome Light - 96 LED Boot Light - Stainless Steel Sport Sill Plates - PIAA Silicone Wipers[/COLOR]
Ahh right, well I'm pretty sure it's not warped discs as I only had them done recently. They did also say to check whether something had been cleaned properly (of corrosion) before the discs were fitted - anyone know what they could be referring to?
Mentioned that the disc may not be sitting completely flush with whatever's behind it - it was done at WIM so must have been done right but might take it back to them to give it a once over.
Nope not the pedal at all, vibration is through the steering wheel - never feels unsafe but braking at motorway speed is really uncomfortable and even passengers can feel it through the car.
2002 '02' IS200 SE Auto - DVD Satnav with Voice Activation - [COLOR="Blue"]Strathcaron Blue - Parking Sensors - 5000K HIDs with Anti-Glare Bulbs - PIAA 6500K Main Beams - LED Sidelights - Mirror/Sunroof Closure - TTE Styling Kit - 18" Styling Kit Alloys with nitrogen filled Goodyear Eagle F1 Asymmetric Tyres - Bluetouch Multimedia Kit - Gromaudio AUX in - Black painted calipers with silver Lexus decals - 12 LED Dome Light - 96 LED Boot Light - Stainless Steel Sport Sill Plates - PIAA Silicone Wipers[/COLOR]
Discs can warp in an instant, were they genuine Lexus items?
Could possibly be ball joints, but if it's been at Lexus I'd have hoped they'd of looked through everything thoroughly.
The discs sit against the hubs, if corrosion is present there, then it may lead to a braking vibration.
Discs can warp in an instant, were they genuine Lexus items?
Could possibly be ball joints, but if it's been at Lexus I'd have hoped they'd of looked through everything thoroughly.
What can happen though is that deposits can build up on parts of the disc, giving an uneven surface (which can make it seem like it's warped), and causing vibration.
With an auto this surface build-up can be more likely than a manual, with increased use of the brake to hold the car (vs the creep of the transmission) in traffic - e.g. if the discs/pads get hot and then you hold the brakes on in traffic.
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
26-06-2016, 01:55 AM #6Discs don't really actually "warp" as such, as I understand it, though. Unless they've been in very extreme conditions, e.g. on the race track.
What can happen though is that deposits can build up on parts of the disc, giving an uneven surface (which can make it seem like it's warped), and causing vibration.
With an auto this surface build-up can be more likely than a manual, with increased use of the brake to hold the car (vs the creep of the transmission) in traffic - e.g. if the discs/pads get hot and then you hold the brakes on in traffic.
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
Roadside Tech You'd best tell Citroen then, as they recalled loads of theirs due to discs warping a few years back
Yeah, but if that was actual warping, was that due to a manufacturing fault, i.e. the discs either started off warped, or warped due to being designed/made badly ? Not really the same as most cases of disc "warping" (which aren't warping at all) that get mentioned on car forums etc.
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
26-06-2016, 07:29 AM #8Roadside Tech You'd best tell Citroen then, as they recalled loads of theirs due to discs warping a few years back
Yeah, but if that was actual warping, was that due to a manufacturing fault, i.e. the discs either started off warped, or warped due to being designed/made badly ? Not really the same as most cases of disc "warping" (which aren't warping at all) that get mentioned on car forums etc.
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
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