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Suspension knocking noise


Nettielikescars

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Cheers for that, thats a right bummer!

 

On the other hand it's good that you didn't waste money on unsuitable suspension :)

 

As mentioned, the subframe bolts are the first point of call and a very easy thing to check. They have very specific torque ratings and need to be set accordingly (again, nearly all garages will just do them up FT and cause more problems).

 

The next point of call is to look at the shock itself. What year is the car, are the shocks original and are they confirmed as stock?

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On the other hand it's good that you didn't waste money on unsuitable suspension :)

 

As mentioned, the subframe bolts are the first point of call and a very easy thing to check. They have very specific torque ratings and need to be set accordingly (again, nearly all garages will just do them up FT and cause more problems).

 

The next point of call is to look at the shock itself. What year is the car, are the shocks original and are they confirmed as stock?

 

Its a 1995 3ltr N/a Jspec, the shocks on the car look black, I think its all original

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Its a 1995 3ltr N/a Jspec, the shocks on the car look black, I think its all original

 

They might well be original and therefore 14 years old, when they are on their way out they normally knock under high compresion and decompresion. It's often difficult to diagnose on a ramp so if the subframe bolts, suspension bushes, balljoints and track ends are within limit it'd not do much harm to replace them with stock units. They are not expensive (relatively when it comes to suspension parts!)

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They might well be original and therefore 14 years old, when they are on their way out they normally knock under high compresion and decompresion. It's often difficult to diagnose on a ramp so if the subframe bolts, suspension bushes, balljoints and track ends are within limit it'd not do much harm to replace them with stock units. They are not expensive (relatively when it comes to suspension parts!)

 

 

Where is the best place to get them from?

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Where is the best place to get them from?

 

If you want to keep it stock then try Paul Whiffin (the website is down right now) or Steve Manley at Toyota in Oxford (see members section). They will be a lot cheaper than your regular dealership.

 

If you want to swap out for aftermarket (i.e stiffer, harsher ride) then stock then you'd need to replace all 4 corners, but I'd not recommend it unless you want to go the modified route.

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If you want to keep it stock then try Paul Whiffin (the website is down right now) or Steve Manley at Toyota in Oxford (see members section). They will be a lot cheaper than your regular dealership.

 

If you want to swap out for aftermarket (i.e stiffer, harsher ride) then stock then you'd need to replace all 4 corners, but I'd not recommend it unless you want to go the modified route.

 

Cheers for that

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take the wheels off in turn , and try it on a spare. a small flat spot on a tyre can cause all sorts of knoking and banging.

 

Wouldnt you get that on smooth rds though not just bumpy ones ?

 

My money is on a damper failing (shock absorber) mine went and made an awful knocking noise over bumpy rds but was fine on smooth rds

 

If it was a valve inside the tyre loose then that would also happen on rough and smooth rds so doubt its that either.

 

Good luck on your hunt

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Just a thought....... I once came across a nasty metallic knocking/ clicking noise from the front end on a mates Celica, ok when going in a straight line on smooth roads regardless of temperature. Only occured mainly when cornering on full lock or when going over uneven surfaces.

 

Thought it was Subframe/ Suspension bolts which we checked and found to be ok . Turned out to be the front Bumper Reinforcement Bar, (Behind/ underneath the front Bumper which connects to the front Chassis Legs) after alot of swearing and head scratching lol!.

 

The Creaking/ Knocking we found was caused by the Reinforcement bar bolts being ever so slightly loose, So as the front Chassis Legs moved against the Reinforcement bar from the Torsional/ laterally twisting forces imposed on the Chassis a i.e cornering/ uneven surfaces made the Creak/ Knocking noise.

 

We suspect it occured due to age we guess, as he had the car since new and hasn't touched or damaged the front end ,(now 10yrs old, when fault occured ) Has been ok since/ at present.

 

But its just a thought........

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Try lightly resting your foot very lightly on the brake pedal when it's making a knocking noise, it's probably the calipers or pads knocking if it stops it.

 

Have tried this already and looked at the calipers today when we had the wheel off, only thing we noticed that it will need brake pads soon.

 

Thanks for the suggestion though.

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  • 3 weeks later...

thank you for all the advise given, just to give an update on the noise.

 

Took it to the garage who looked after my Skyline, and asked him to check the front Subframe bolts for me, Which he did then and there (cos hes a good egg), the rear ones on the front subframe where tight but when he checked the ones at the front of the subframe, they where down to about 40nm, so he torqued them up for me.

 

It seemed to be a quiter but there was still a knocking.

 

Well i have now also changed the Wheels to 17inch and the front of the car feels loads better, but still has a slight noise.

 

Andy at SP Autos (the chap who looked after my Skyline)is going to check the Rear Subframe this week for me.

 

I'll give up an update once this has been done.

 

Thanks for the advise.

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Ive had this before, i checked everything on the car and couldnt find a fault, but pushing down the driverside front suspension made the noise so i took the whole suspension off and checked each part, I cam up with nothing untill i dismantled the shocker..

 

Basically the top nut had been done up with an air gun which had damaged some of the threads of the shock. the nut would go tight but it wasnt down enough to stop the shock moving and hitting the inside of the topmount.. It was only a few mm but enough to make horrible sounds.. I replaced the front shocks and the noise went as everything was tight once more..

 

Might not be your problem, but worth having a look at if all else fails

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Ive had this before, i checked everything on the car and couldnt find a fault, but pushing down the driverside front suspension made the noise so i took the whole suspension off and checked each part, I cam up with nothing untill i dismantled the shocker..

 

Basically the top nut had been done up with an air gun which had damaged some of the threads of the shock. the nut would go tight but it wasnt down enough to stop the shock moving and hitting the inside of the topmount.. It was only a few mm but enough to make horrible sounds.. I replaced the front shocks and the noise went as everything was tight once more..

 

Might not be your problem, but worth having a look at if all else fails

 

I have got 2 front shocks ready to be put on, but that wont be til after chrimbo. The car has had all sorts of tests, even on one of the new MOT ramps that shakes the car.

 

It is alot better than it wass, it doesn't sound or feel like the cars falling apart now!

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Guest Suprafly

Have you checked your anti roll bar bushes?

 

I've also had an annoying rattly knocking noise lately driving me nuts, the sound was to me pointing towards the droplinks, so I changed them and the noise was still there, it turned out to be worn anti roll bar bushes.

 

How to check?

 

Simple... Jack up the car, remove the plastic front undertray (handfull of 10mm bolts/screws) which will reveal the ARB, take a good grip of it with both hands and see if you can get some play, if you do then theres your problem right there.

 

I discovered this on my car last friday, and I'm now going to give whifbitz a buzz today for some replacement uprated Poly bushes.

 

My money is on these mate, it's easy to check and may save you £££'s on eliminating other items, also the poly ARB bushes for front and rears together will see you get change from 40 quid.

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Just as a gentle reminder, please try and open a new thread with a sensible subject heading. If someone wants to search for a suspension knocking noise later on they won't find it with "Please help!!!!!!!!!!" as the title, even with 10 exclamation points.

 

There is a drive to simply lock a thread should the title be rather unhelpful, however in this case the thread is already 4 pages long, there is a genuine problem and a useful discussion taking place, and the OP has a low post count and so probably is unaware of the missive from Mawby & the rest of us :) So I'll just change the title to something more useful and be on my way.

 

Don't ask me why this thread was locked, it's a mystery - it wasn't because of the thread title. Apologies about that.

 

-Ian

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Just as a gentle reminder, please try and open a new thread with a sensible subject heading. If someone wants to search for a suspension knocking noise later on they won't find it with "Please help!!!!!!!!!!" as the title, even with 10 exclamation points.

 

There is a drive to simply lock a thread should the title be rather unhelpful, however in this case the thread is already 4 pages long, there is a genuine problem and a useful discussion taking place, and the OP has a low post count and so probably is unaware of the missive from Mawby & the rest of us :) So I'll just change the title to something more useful and be on my way.

 

Don't ask me why this thread was locked, it's a mystery - it wasn't because of the thread title. Apologies about that.

 

-Ian

 

 

I'm very sorry, i wont do it again [OOPS][/OOPS]

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