Ek3 Vibrate At 120Kmph

sira · February 5, 2015

Hi

Y'day i noticed my EK3 vibrate at 120Km . it is ok with 100 kmph but above 120 and 140 it worst.

Tyres were new and not even reach 5000Km. new shocks - Tokiko. when i replace the tyres, I did the wheel balace and alignment

any idea

Edited February 5, 2015 by sira

VVTi · February 5, 2015

Your rims may be buckled or get your tie rod and rack ends checked along with all lower arm bushes.

Are the tyres a good brand?

Macro AutoTech in Rathanapitya can straighten bent wheels.

sira · February 5, 2015

Tyres are brigstone

All lower arm and upper are bushes are replaced . probbly RBi brand

wherer would be the best place to do a alignment. did not do after replac the shocks. do i ? since this double wish bone type suspension, shock dose not changes the aligment

iRage · February 5, 2015

This might be bit of a freak case...sometime back my Hilux Surf had a shudder after replacing the brake pads which felt not only during braking but also at high speeds (in fact if memory serves me right braking had a gentle soft pulsation whilst at speed it was a more stronger noticeable vibration). Apparently the rotor had a slight warp which was "dampened" out with worn out pads and now with thicker and meatier pads the slight warp on the rotor was "touching" against the pad even when the brakes were not applied. Like I said this might be a a freak case and unlikely in your case especially if you feel no shudder when braking.

sira · February 5, 2015

Hi Irage

Yes i felt that. when i press the break i felt that breake paddel vibration similar to the vibration. you are correct,. how to fix this than

VVTi · February 5, 2015

Hi Irage
Yes i felt that. when i press the break i felt that breake paddel vibration similar to the vibration. you are correct,. how to fix this than

Check your caliper pins. If discs are warped, then there is no other option but to change them.

another thing, are all the wheel nuts tightened properly?

The Don · February 5, 2015

Installing new shocks will change your alignment as it affects the camber. Also most alignment places don't really adjust camber stating its not adjustable but due to bumpy roads it can get altered over time.

Car care wellawatte is where I now go religiously to get my alignment done as they are the first people to cure my vibration issues. They even told me there is a slight issue with the toe due to a past accident but it should not affect handling.

My advice is get your wheel balance and alignment redone and get all your suspension components checked while doing it. Warped wheels should become fairly obvious when they try to balance wheels.

Schiffer · February 5, 2015

Experienced something similar before. That was due to loosing a wheel weight. even though its recently done check your wheel balancing again before going into the complicated stuff

maheshw · February 5, 2015

Facing similar with a N16.Auto.what happen is for each & everytime when deep press the gas peddle car gets vibrate while moving. Replace all weared suspention alignment & all but still its same. My maka bas said now engine is undercompression and might be due to that? I have question in mounts. Bcz if accelerate slightly its not there that much. Very little.

MV-5 · February 5, 2015

Experienced something similar before. That was due to loosing a wheel weight. even though its recently done check your wheel balancing again before going into the complicated stuff

yes, re do the wheel balance, when i faced the same problem first i did the wheel balance and it did not solve the problem, then after few weeks i re-checked the wheel balance (not the same place).

while the wheel is spinning , the guy noticed that the wheel is buckled, but still it is balanced.

i replaced it with new alloy set (JJ , dehiwala), problem solved.

sira · February 6, 2015

Installing new shocks will change your alignment as it affects the camber. Also most alignment places don't really adjust camber stating its not adjustable but due to bumpy roads it can get altered over time.
Car care wellawatte is where I now go religiously to get my alignment done as they are the first people to cure my vibration issues. They even told me there is a slight issue with the toe due to a past accident but it should not affect handling.

My advice is get your wheel balance and alignment redone and get all your suspension components checked while doing it. Warped wheels should become fairly obvious when they try to balance wheels.

Hi Don

I got doubel wishbone suspension system . not macpherson . I have not removed the upper to change the shock absorbers.Think the upper arm settings will remain as it is hopefully . so i belive camber will remain as it is . please me see your views.

sira

Amila_Silva · February 6, 2015

Sira,

I once had the very same issue caused by a loose tie rod end. Tie rod end looked fine from the out side but once it was taken out and inspected by the mechanic he was sure that it needs to be replaced which solved the issue.

The Don · February 10, 2015

Hi Don
I got doubel wishbone suspension system . not macpherson . I have not removed the upper to change the shock absorbers.Think the upper arm settings will remain as it is hopefully . so i belive camber will remain as it is . please me see your views.

sira

But Sira, have you ever had to change the bushes on any of your arms, upper or lower? Camber is adjustable both using the upper lower or both (for most adjustment). Is there any adjustments possible on any of your suspension?

What I have found is that in all of my cars thanks to the roads, the suspension is no longer to factory spec. I've had to use adjustment screws on both of them to get the camber right. This is purely down to deformities caused by rough roads and abnormalities in the bushes replacing the original. To get factory perfect camber, I would have needed new arms, and some adjustments on the mount points.

sira · February 11, 2015

I did replace the right side rack end and tie rods as i found small shake on wheel. Then did a wheel alignment. Did not speed up 120 yet. Will update you all

Edited February 11, 2015 by sira

sira · February 11, 2015

But Sira, have you ever had to change the bushes on any of your arms, upper or lower? Camber is adjustable both using the upper lower or both (for most adjustment). Is there any adjustments possible on any of your suspension?
What I have found is that in all of my cars thanks to the roads, the suspension is no longer to factory spec. I've had to use adjustment screws on both of them to get the camber right. This is purely down to deformities caused by rough roads and abnormalities in the bushes replacing the original. To get factory perfect camber, I would have needed new arms, and some adjustments on the mount points.

Hi Don

No i did not change them .

maheshw · February 13, 2015

Facing similar with a N16.Auto.what happen is for each & everytime when deep press the gas peddle car gets vibrate while moving. Replace all weared suspention alignment & all but still its same. My maka bas said now engine is undercompression and might be due to that? I have question in mounts. Bcz if accelerate slightly its not there that much. Very little.</p></blockquote>

Ane idea?

pug306xsi · February 13, 2015

Don where is car care?

is it the one near the Saree shops? thanks.

The Don · February 13, 2015

Don where is car care?
is it the one near the Saree shops? thanks.

Yes, it is infront of a Saree shop. Its on the land side in Wellewatte close to the Savoy and just off the Galle road.

sira · February 15, 2015

They are doing manual Adjustment. but seems doing it professionally. I had camber issue and they fixed by pulling out the hub with a special tool attached. I think they are very good.

now looks car is steady , but when I appy break at 120 I still feel the paddle looks pulsing . not sure how to isolate front or rear break - front disk , rear drum . dose drum cause to disk ?

Supra_Natural · February 16, 2015

They are doing manual Adjustment. but seems doing it professionally. I had camber issue and they fixed by pulling out the hub with a special tool attached. I think they are very good.

now looks car is steady , but when I appy break at 120 I still feel the paddle looks pulsing . not sure how to isolate front or rear break - front disk , rear drum . dose drum cause to disk ?

Sure it isn't your ABS kicking in? Pulsing brake pedal under hard braking is usually just the ABS working.

sira · February 16, 2015

no machan. my one does not have ABS. this EXI was imported in 1998 brand new. i was worrying that even 96 models got ABS for JDMs , this is JHM which is no ABS and Air bag

yesterday i lift the car ,removed the wheel and ran with 120 kmph then noticed that drive shaft is vibrating at that speed. do you think this drive shaft should not vibrate?

The Don · February 16, 2015

no machan. my one does not have ABS. this EXI was imported in 1998 brand new. i was worrying that even 96 models got ABS for JDMs , this is JHM which is no ABS and Air bag
yesterday i lift the car ,removed the wheel and ran with 120 kmph then noticed that drive shaft is vibrating at that speed. do you think this drive shaft should not vibrate?

Can you explain a bit more. How did you observe the drive shaft vibrating? Was this vibration being transferred to the wheels?

sira · February 16, 2015

Don

I believe the vibration will transfer to hub . while hub is vibrating the wheel will too.

The Don · February 16, 2015

Don
I believe the vibration will transfer to hub . while hub is vibrating the wheel will too.

But do you not hear any noise from the drive shaft? A vibration will result if the shaft is bent or if the bearings at each end are worn. But this normally results in click type noises as the vehicle moves forward, which is normally the warning to change your CV joints or gearbox ends (the shaft itself).