Fiat X250 REAR wheel alignment

[yeoblade]

As title, 2011 model HD Chassis LWB, any one know if there is any adjustment on this model, the back tyres wearing badly on the inside edge.

Edited, BOTH tyres now I have checked

 

[harrow]

As title, 2011 model HD Chassis LWB, any one know if there is any adjustment on this model, the back nearside tyre is wearing badly on the inside edge.

This with the rear beam and shallow leaf springs ? Then no apart from wear in the wheel bearing

 

[yeoblade]

I'd thought that wheel bearings would be a rumbling and rattlings if worn that bad?

It's got air assist too

 

[colinm]

It strikes me that a 630 with air assist is likely to be heavily loaded on rear, I suspect the beam is bending under load.

 

[The laird]

If it was me I’d get a laser check done could be a bent stub that the bearing runs on
the laser may source the problem

 

[QFour]

Hit a big pothole in the Laika on the Motorway going to Hull. Made a right mess of the steering. Took three attempts by three different firms to get it sorted. Last guy turned up with all sorts of kit. Everything was hung off the chassis and all angles on all the wheels checked with a couple of lasers. Then he adjusted one front track rod slightly and that was it. Drives like a dream now. Worth the £80 it cost. He did check everything and certainly knew what he was doing.

 

[yeoblade]

It strikes me that a 630 with air assist is likely to be heavily loaded on rear, I suspect the beam is bending under load.

Yes it generally is near max weight. Googling around it seems there isn't any adjustment.

I note on the service history the previous owner had had the rear shocks replaced when it was just 3 years, a bit unusual for shocks to only last that long, just maybe he was told that worn shocks were causing the problem if he had experienced the same tyre wear (or wore them out), I know he had it fully laden with a scooter rack on the back.
I'll probably just have to treat excessive tyre wear as a consumable for mis-using it

 

[Wooie1958]

Mine is on the ALKO chassis and several years back during my regular maintenance i noticed some very strange wear on the rear tyres on returning from France.

The outer edge of the offside tyre and the inner edge of the nearside tyre had considerable wear on them, them were fine before we went.

My first thoughts that is was possibly down the excessive camber we`d encountered in France and several times it felt like we was almost falling over.

I swopped them over ( side to side ) and continued using it over here in the UK and found that the rear tyres wore the same way.

The outer edge of the offside tyre and the inner edge of the inside tyre wore again render both rear tyres with now virtually bold edges.

That ruled out my theory that the excessive camber in France had caused it so i contacted 3 different " ALKO Chassis Specialists "

2 of them wanted to actually inspect the vehicle and the other told me the problem instantly over the phone.

Of the 2 that inspected it one said that the chassis was twisted and it needed re-jigging, they quoted me in excess of £2,000 + VAT.

The other one said it had probably been overloaded because motorhomers hadn`t a clue how much weight they had on board and needed a new axle, they quoted me £2,995 + fitting + VAT.

They 3rd instantly said over the phone the ALKO axle was knackered, needed replacing and quoted £3,495 + fitting + VAT.

To cut an even longer story short it was the rear shock absorbers that were knackered, £140 a pair delivered and i fitted them.

20,000 miles later and they are still fine, the wear on the rear tyres is very even across the tread.

 

[trevskoda]

Over loaded or axle beam bent/or at hub ends resulting in in edge worn as wheels are running pos camber.
Sortable if you know what you are doing,tip heat and a jack required.

 

[caledonia]

Mine is on the ALKO chassis and several years back during my regular maintenance i noticed some very strange wear on the rear tyres on returning from France.

The outer edge of the offside tyre and the inner edge of the nearside tyre had considerable wear on them, them were fine before we went.

My first thoughts that is was possibly down the excessive camber we`d encountered in France and several times it felt like we was almost falling over.

I swopped them over ( side to side ) and continued using it over here in the UK and found that the rear tyres wore the same way.

The outer edge of the offside tyre and the inner edge of the inside tyre wore again render both rear tyres with now virtually bold edges.

That ruled out my theory that the excessive camber in France had caused it so i contacted 3 different " ALKO Chassis Specialists "

2 of them wanted to actually inspect the vehicle and the other told me the problem instantly over the phone.

Of the 2 that inspected it one said that the chassis was twisted and it needed re-jigging, they quoted me in excess of £2,000 + VAT.

The other one said it had probably been overloaded because motorhomers hadn`t a clue how much weight they had on board and needed a new axle, they quoted me £2,995 + fitting + VAT.

They 3rd instantly said over the phone the ALKO axle was knackered, needed replacing and quoted £3,495 + fitting + VAT.

To cut an even longer story short it was the rear shock absorbers that were knackered, £140 a pair delivered and i fitted them.

20,000 miles later and they are still fine, the wear on the rear tyres is very even across the tread.

A shock absorber is just that. All it does is dampen the action of the spring and has nothing to do with suspension geometry. Get it to a decent garage to check the geometry and leave it loaded for the check.

 

[andyjanet]

Nobody has mentioned tyre make and age it could be tyre wear because of an internal tyre problem
Cords or wires could be damaged or just the wrong type of rating would allow them to wear unevenly

 

[andyjanet]

A shock absorber is just that. All it does is dampen the action of the spring and has nothing to do with suspension geometry. Get it to a decent garage to check the geometry and leave it loaded for the check.

A shock absorber does more than absorb shocks it keeps the tyre in full contact with the road
When your driving along if you hit a bump the wheel is forced up the shock is there to resist the variable forces as in
Sudden shock upwards
A bounce scenario, where there’s continuous motion up and down after the bump and also a rebound force where you hit a bump milliseconds after the first one so as the shock is returning to base line it controls the second bump with more pressure to negate any rebound,
As a former mechanic I often see vehicles driving down the road with the rear wheels shuddering up and down (knackered rear shocks)
And as all things you get what you pay for

 

[andyjanet]

Yes it generally is near max weight. Googling around it seems there isn't any adjustment.

I note on the service history the previous owner had had the rear shocks replaced when it was just 3 years, a bit unusual for shocks to only last that long, just maybe he was told that worn shocks were causing the problem if he had experienced the same tyre wear (or wore them out), I know he had it fully laden with a scooter rack on the back.
I'll probably just have to treat excessive tyre wear as a consumable for mis-using it

Possible the original fitment shocks are not made for the extra load with scooter rack and motorhome body,
Might be worthwhile looking into some expensive shocks like koni
But I would have a look at tyre age and make before fitting good shocks and then getting the rear axle on a weigh bridge if tyres are still wearing in six months start looking at an axle problem

 

[harrow]

Mine is on the ALKO chassis and several years back during my regular maintenance i noticed some very strange wear on the rear tyres on returning from France.

The outer edge of the offside tyre and the inner edge of the nearside tyre had considerable wear on them, them were fine before we went.

My first thoughts that is was possibly down the excessive camber we`d encountered in France and several times it felt like we was almost falling over.

I swopped them over ( side to side ) and continued using it over here in the UK and found that the rear tyres wore the same way.

The outer edge of the offside tyre and the inner edge of the inside tyre wore again render both rear tyres with now virtually bold edges.

That ruled out my theory that the excessive camber in France had caused it so i contacted 3 different " ALKO Chassis Specialists "

2 of them wanted to actually inspect the vehicle and the other told me the problem instantly over the phone.

Of the 2 that inspected it one said that the chassis was twisted and it needed re-jigging, they quoted me in excess of £2,000 + VAT.

The other one said it had probably been overloaded because motorhomers hadn`t a clue how much weight they had on board and needed a new axle, they quoted me £2,995 + fitting + VAT.

They 3rd instantly said over the phone the ALKO axle was knackered, needed replacing and quoted £3,495 + fitting + VAT.

To cut an even longer story short it was the rear shock absorbers that were knackered, £140 a pair delivered and i fitted them.

20,000 miles later and they are still fine, the wear on the rear tyres is very even across the tread.

I would not expect the replacement of shock absorbers to cure the problem, BUT because the axle was left hanging during the fitting process.

 

[caledonia]

A shock absorber does more than absorb shocks it keeps the tyre in full contact with the road
When your driving along if you hit a bump the wheel is forced up the shock is there to resist the variable forces as in
Sudden shock upwards
A bounce scenario, where there’s continuous motion up and down after the bump and also a rebound force where you hit a bump milliseconds after the first one so as the shock is returning to base line it controls the second bump with more pressure to negate any rebound,
As a former mechanic I often see vehicles driving down the road with the rear wheels shuddering up and down (knackered rear shocks)
And as all things you get what you pay for

As I said it dampens the action of the spring by absorbing the shock

 

[yeoblade]

Wear on the old tyres was about 5mm more on the inside. New tyres recently 121 tyre index , back axle at 2,370kg. ,and they are just starting to show similar edge wear which you can feel when you run your fingers over the tread.

 

[Markd]

I think that getting a full laser wheel alignment check done would be time well spent to see just what's happening.
That may be a lot easier said than done of course with size-weight.
Chewing through tyres can be expensive - on the other hand may be cheaper than remedying the problem!

 

[trevskoda]

A shock absorber does more than absorb shocks it keeps the tyre in full contact with the road
When your driving along if you hit a bump the wheel is forced up the shock is there to resist the variable forces as in
Sudden shock upwards
A bounce scenario, where there’s continuous motion up and down after the bump and also a rebound force where you hit a bump milliseconds after the first one so as the shock is returning to base line it controls the second bump with more pressure to negate any rebound,
As a former mechanic I often see vehicles driving down the road with the rear wheels shuddering up and down (knackered rear shocks)
And as all things you get what you pay for

The shock only dampens the down return force,does nout with the axle on way up,unless you have double rebound damper shocks which in almost 50 years i have never seen on cars or vans.
What you will get is skip with bad dampers as you say but tyre will have high and low tread,he has inside wear which is a bent axle,cure heat centre and jack up-cheap fix, or if its at the ends and bad then replace the complete beam,the former may cure it if only light bend.

 

[witzend]

Yes it generally is near max
I note on the service history the previous owner had had the rear shocks replaced
when it was just 3 years old

Where they the right shocks or could the air suspension be holding them fully extended

 

[yeoblade]

Mine is on the ALKO chassis and several years back during my regular maintenance i noticed some very strange wear on the rear tyres on returning from France.

The outer edge of the offside tyre and the inner edge of the nearside tyre had considerable wear on them, them were fine before we went.

My first thoughts that is was possibly down the excessive camber we`d encountered in France and several times it felt like we was almost falling over.

I swopped them over ( side to side ) and continued using it over here in the UK and found that the rear tyres wore the same way.

The outer edge of the offside tyre and the inner edge of the inside tyre wore again render both rear tyres with now virtually bold edges.

That ruled out my theory that the excessive camber in France had caused it so i contacted 3 different " ALKO Chassis Specialists "

2 of them wanted to actually inspect the vehicle and the other told me the problem instantly over the phone.

Of the 2 that inspected it one said that the chassis was twisted and it needed re-jigging, they quoted me in excess of £2,000 + VAT.

The other one said it had probably been overloaded because motorhomers hadn`t a clue how much weight they had on board and needed a new axle, they quoted me £2,995 + fitting + VAT.

They 3rd instantly said over the phone the ALKO axle was knackered, needed replacing and quoted £3,495 + fitting + VAT.

To cut an even longer story short it was the rear shock absorbers that were knackered, £140 a pair delivered and i fitted them.

20,000 miles later and they are still fine, the wear on the rear tyres is very even across the tread.

Interesting , did the old ones feel knackered when you took them out, leaking?