ZTT kicks out at rear going over bumps - Page 2

RPWC · 5th February 2017, 10:07

Quote:

Originally Posted by Stag>75

I have a 75 sedan, bought it 4.5 years back. When I bought it I thought it really bounced in the rear over speed humps and had a bit of a sideways kick over small bumps in the road. I had it checked out by 2 suspension specialists (One of whom is considered the best in the city) and they said everything was fine. 2 weeks back it was with a 75 expert who tried to do a 4 wheel alignment but noticed that when it was lined up on the machine and he touched the car it would throw throw out the alignment. So his diagnosis was seized rear shock absorbers. After having them replaced it is now a different car. And it is a low mileage car so why they siezed who knows.

A low mileage car, can sometimes throw up more problems than a high miler, if it had been standing for a while without much use prior to coming into your ownership,thennthat could have caused the seizure. Only a guess mind you, not said to be the real reason.

mr m · 7th February 2017, 13:41

hi all,
after reading this thread i thought i should check my springs and shocks as my zt does the same on certain roads. the shocks seem fine but i do have a broken o/s/r spring. i have found all these spring codes and colours very confusing. the paint colour on mine is a light green, i would like to know if any of these are suitable as replacements, http://www.ebay.co.uk/itm/1914835442...%3AMEBIDX%3AIT or http://www.ebay.co.uk/itm/3320328484...%3AMEBIDX%3AIT
any help or opinions appreciated, please bare in mind as always I'm skint so i am looking at the cheaper end of the market.

mark.

Christopher Price · 7th February 2017, 15:30

Quote:

Originally Posted by mr m

hi all,
after reading this thread i thought i should check my springs and shocks as my zt does the same on certain roads. the shocks seem fine but i do have a broken o/s/r spring. i have found all these spring codes and colours very confusing. the paint colour on mine is a light green, i would like to know if any of these are suitable as replacements, http://www.ebay.co.uk/itm/1914835442...%3AMEBIDX%3AIT or http://www.ebay.co.uk/itm/3320328484...%3AMEBIDX%3AIT
any help or opinions appreciated, please bare in mind as always I'm skint so i am looking at the cheaper end of the market.

If funds are limited, I appreciate that springs are supposed to be replaced in pairs, but why not just replace the broken one with one of these http://www.ebay.co.uk/itm/Rear-Sprin...wAAOSw8w1X8imX and then replace as a pair when funds allow?

minimutly · 7th February 2017, 18:21

Absolutely don't do it. Unless you can find a sh spring of the correct colour code don't bother.
So many people are selling "rover 75/mgzt" springs as fit all, and as we know the range of springs are huge. You could well end up with a three cornered skateboard, been there done that.

T16 · 8th February 2017, 04:48

Funny you should make a thread on this...

Ive noticed the effect MUCH more on ZT-Ts than any saloons.

Whether this is something intrinsic to the extra stiffness at the back, or whether its down to all the ZT-Ts being filled with rocks/whatever during their working lives and knackering the chassis mounted trailing arm bushes... who knows!

My money is on the trailing arm bushes that hold the front of the arms to the chassis. The rest of the suspension does not allow much lateral movement if all is in order...(upper and lower arm bushes...)

Still, there are a LOT of bushes at the back that can all exaggerate the effect.

Oh PS..... I did a TOTAL rear suspesion refresh of everything BAR those front trailing arm bushes, and although the effect was BETTER, it was still noticable afterwards. At this point I assumed that it could ONLY be those front arm bushes, as everything else was replaced.

Its also exaggerated with soft side wall tyres, but this to me is more of a symptom of the issue, rather than the cause. I dont mean to cause you dismay, but Ive driven a really low milage ZT in wonderful condition, with a cracked rear spring, and it didnt exhibit any of the "side shake" at all.... So my money is not on the spring itself, but naturally that wont be doing any good!

Robbberd · 13th February 2017, 14:36

poor tyres dont help either , i noticed mine doing this the other week , tyre was very spongy in the sidewall , chnged both rears , made a hell of a difference too.

7th February 2017, 13:41	#12
mr m Avid contributor mg zt 180 +. rover 200 diesel Join Date: Jun 2015 Location: billingshurst Posts: 166 Thanks: 30 Thanked 42 Times in 36 Posts	hi all, after reading this thread i thought i should check my springs and shocks as my zt does the same on certain roads. the shocks seem fine but i do have a broken o/s/r spring. i have found all these spring codes and colours very confusing. the paint colour on mine is a light green, i would like to know if any of these are suitable as replacements, http://www.ebay.co.uk/itm/1914835442...%3AMEBIDX%3AIT or http://www.ebay.co.uk/itm/3320328484...%3AMEBIDX%3AIT any help or opinions appreciated, please bare in mind as always I'm skint so i am looking at the cheaper end of the market. mark.

7th February 2017, 18:21	#14
minimutly Posted a thing or two mg zt Join Date: Mar 2014 Location: cardigan Posts: 1,087 Thanks: 28 Thanked 187 Times in 158 Posts	Absolutely don't do it. Unless you can find a sh spring of the correct colour code don't bother. So many people are selling "rover 75/mgzt" springs as fit all, and as we know the range of springs are huge. You could well end up with a three cornered skateboard, been there done that.

8th February 2017, 04:48	#15
T16 I really should get out more....... ZT CDTi 135, ZT260SE Join Date: Feb 2011 Location: Dundee Posts: 2,877 Thanks: 10 Thanked 331 Times in 213 Posts	Funny you should make a thread on this... Ive noticed the effect MUCH more on ZT-Ts than any saloons. Whether this is something intrinsic to the extra stiffness at the back, or whether its down to all the ZT-Ts being filled with rocks/whatever during their working lives and knackering the chassis mounted trailing arm bushes... who knows! My money is on the trailing arm bushes that hold the front of the arms to the chassis. The rest of the suspension does not allow much lateral movement if all is in order...(upper and lower arm bushes...) Still, there are a LOT of bushes at the back that can all exaggerate the effect. Oh PS..... I did a TOTAL rear suspesion refresh of everything BAR those front trailing arm bushes, and although the effect was BETTER, it was still noticable afterwards. At this point I assumed that it could ONLY be those front arm bushes, as everything else was replaced. Its also exaggerated with soft side wall tyres, but this to me is more of a symptom of the issue, rather than the cause. I dont mean to cause you dismay, but Ive driven a really low milage ZT in wonderful condition, with a cracked rear spring, and it didnt exhibit any of the "side shake" at all.... So my money is not on the spring itself, but naturally that wont be doing any good!

13th February 2017, 14:36	#16
Robbberd Loves to post MG ZT Join Date: Feb 2012 Location: Wrexham Posts: 407 Thanks: 64 Thanked 5 Times in 5 Posts	poor tyres dont help either , i noticed mine doing this the other week , tyre was very spongy in the sidewall , chnged both rears , made a hell of a difference too.