jas278
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Posts posted by jas278
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Mask over the problem as you like , Blue smoke is burning oil.........
Blue smoke oil
White............. water ......
Black.............. fuel.......... 20 yrs of working on HGV s must count for something....Have a look here.....
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Blue smoke is burning oil, it all depends what state the engine was in when parked up , it could be simply hardened valve stem seals leaking or worn piston rings , but I think the cheapest option would be an oil and filter change a good long steady run and see what happens before spending vast amounts.........
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Honiton Hobbit had Colways fly apart less than 5miles after fitting them
remoulds always a risk IMHO
Well , it just shows whats good for one is n't always good for everyone, of course when you do have a problem its how the supplier deals with that problem , that also has a bearing on the opinion of the product involved. In my case Bronco were n't interested ,its only when I researched tyre regulations that I found the set they had supplied to me did nt meet ECE tyre regs...........
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Slightly more on topic is that Bronco mention that they had moved factory, so I hope some quality control concerns might be addressed.
Theres a lot more to this story than the tyre report . Ask them why they have moved factory , ask them why they keep telling people different dates , for supply and diferent stories, my expierience of dealing with Bronco has amazed me ? I always find honesty is the best policy... unless you have something to hide ?
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A lot of mixed views , will never go back to a remould ,but I must say there has always been a lot of good reports about Greenways. As for a damaging tyres ,I think the better the tyre (quality) the more it will withstand so a cheaper tyre may well be false economy allround.........
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I suppose it's partly down to the road conditions here which are probably not unlike what you'd find in bits of Africa, but I have seen quite a lot of tyres fail structurally before the tread has actually worn out. Only the other day I was out in a Freelander with a horrible wobble, and when it went up on the wheels free it turned out that three of the four tyres were out of shape - after only about 4 years and (I think) 20k miles
- and they were Michelins.... seen the same thing with BFGs as well, for some reason the AT's often found on the Japanese market Pajeros seem particularly bad for this.It is one reason I am sceptical about remoulds which by definition are starting with a carcass that is half knackered. Having said that I am still trying to get hold of a set of those Insa Turbo Special Tracks because they are too nice to resist
if they fall to bits I'll go back to BFG's.No more remoulds here........................
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I will never touch a remould again, but you do get people who swear by them......
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From the report............
Mr Stray informed me that he had operated these tyres in the same way as on previous sets of tyres and at the same correct recommended pressures for the vehicle, and I am unable to detect any collaborative evidence for under-inflation prior to the complete deflation of the tyre due to the carcass break-up.
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Subject: Tyre Report
A long story but here is a factual report on 4 tyres which belonged to me .....
Report on 4 Tyres:
branded
‘BRONCO’ Grizzly Claw
Ref: SAG / 05 / 12 / LTS
Ref: SAG / 05 / 12 / LTS
Report prepared for
Marcus Sabin,
Leicester Trading Standards
Report prepared by
S.A. Green – HND, ONC.
INTRODUCTION
I am currently employed by ‘Starco’ Europe, which is part of the ‘Scandinavian Tyre and Rim Company’, as Technical Director. In addition to my responsibility for technical matters in the UK, my role extends to technical support for all 13 plants around Europe and Russia. The Company manufactures wheels, tyres and wheel assemblies for supply as Original Equipment to vehicle manufacturers. Previously, Goodyear had employed me for fifteen years until May 2000. My final position as Technical Training Manager, gave me responsibility for all Technical Training of company personnel operating throughout the UK, Europe and the Middle East. Prior to this position I was Manager of Product Performance and Service department for six years until 31st December 1994. In this role I had occasion to examine many thousands of tyres having failed either in service, or as a result of systematic destructive testing.
I began my career with British Leyland as an apprentice and gained extensive experience in all aspects of automotive engineering in both design and practical skills. I hold an HND qualification in Mechanical Engineering and an ONC in Electronics. Following my apprenticeship I worked for 11 years in research and development, specifically dealing with axles, brakes and suspension systems as part of a vehicle design team. I specialise in all aspects of vehicle design and behaviour, and in particular, tyres, their performance, and the interaction between tyres and vehicle suspension design.
I have been asked to examine the subject tyre(s) with the purpose of identifying the reasons for their current condition, the nature of any structural failure and any possible implications to the merchantable and safe condition for sale. I was given the information that the wheels and tyres were fitted to a ‘Landrover Discovery’ 4 x 4 vehicle and had only travelled for a relatively short distance since they were supplied.
THE TYRE(S)
I examined 4off wheel and tyre assemblies at a private address in Hinckley, at the request of Mr Marcus Saban of Leicester Trading Standards, the details of which were as follows:
Tyre size: LT 265/75R16
Service description: 112Q
Brand: ‘Bronco’ Grizzly Claw
TDR: 14mm centre-line – 17mm at shoulder
Production date / Serial No: No markings
Other markings: Retread made in England – conforms to BSAU 144
EXAMINATION
Following a careful examination of the wheels and tyres, the following details were noted:
Wheel Assembly No. 1
The first of four tyres was examined having been fitted to the front of the vehicle, to reveal a structural failure in the shoulder area of the tyre such that complete and catastrophic deflation had occurred.
There was clear evidence of rubber degradation and cracking due to overheating and rubber reversion at the base of the large shoulder blocks and also at the junction between these blocks and the carcass where there are naturally uneven stresses due to the heavy lug design.
The carcass showed clear signs of distress at these same points and had suffered separation between radial cords and also belt edge, resulting in structural failure. The carcass had suffered from severe abrasion and overheating in the shoulder areas as was evidenced by the inner liner condition. I was unable to detect any evidence of a penetration which might have caused the deflation. The deflation appears to have been caused by the break-up of the tyre structure, the evidence of overheating being such that it had occurred over a relatively short distance including the time taken for the driver to pull over and stop when it was realised that the tyre had failed.
Wheel Assembly No. 2
The second tyre, also having been fitted to the front of the vehicle, was also showing similar signs of rubber reversion in the shoulder blocks with some cracks beginning to appear. However, this tyre remained intact insofar as it was still inflated and no major structural failure was immediately apparent.
Wheel Assembly No’s 3 & 4
These two tyres remained in apparently sound and inflated condition.
Balance Weights
The following quantities of balance weights were seen to be fitted to the wheel assemblies, having been balanced by the tyre shop who supplied the new wheels and tyres;
Wheel assembly #1 – 225 grams
Wheel assembly #2 – 200 grams
Wheel assembly #3 – 190 grams
Wheel assembly #4 – 100 grams
TERMS OF REFERENCE
There are standards laid down within European Directives ECE108 / ECE109 regarding the manufacture and testing of such remoulded tyres.
These performance requirements are specifically to ensure that process quality is consistent to the original development of the remoulded product, and that any such product is capable of being operated within the performance suggested by its service description.
The markings ‘conforms to BSAU 144’ are out-dated and obsolete for two reasons (i) They are now superseded by ECE 108 / 109, & (ii) In any event, there were several suffix additions and revisions to BSAU 144 even when it was current, no such suffix is marked on these tyres, this means that these markings were insufficient even when last BSAU 144 was current.
The remoulding processor is totally responsible for ensuring that the carcasses gleaned from tyres having previously worn-out treads, are in suitable condition for both the re-moulding process and the subsequent safe operation with the new re-moulded tread. A further requirement is dynamometer testing (sometimes referred to as ‘drum’ testing) for the required duration to prove that the tyre tread design, rubber compounds used and re-manufacturing process are all of such integrity that they are safe for continuous operational use up to the full load and speeds indicated by that service description.
The above mentioned dynamometer tests are required to be repeated during production runs to ensure that each subsequent batch also complies with the same requirements.
CONCLUSIONS
The tyres fitted to the front axle of the vehicle whilst it was lightly loaded (as was the case according to Mr Stray), would be subjected to a higher load than those on the rear axle due to the un-laden weight distribution of the vehicle, additionally, the steering forces would also load the shoulder areas of the tyres more than those at the rear. This is therefore a fair indication that the loads at the front axle, although being far below what the tyres are able to carry according to their service description, creates the differing results. Both front tyres were showing signs of distress, with one of them having failed completely, both rear tyres being in better condition than the front ones.
The two front tyres showed clear evidence of overheating and rubber reversion in the shoulder areas and as the tyres were not carrying their maximum load, this tends to indicate a small safety margin with regard to heat generation and satisfactory running temperature.
Mr Stray informed me that he had operated these tyres in the same way as on previous sets of tyres and at the same correct recommended pressures for the vehicle, and I am unable to detect any collaborative evidence for under-inflation prior to the complete deflation of the tyre due to the carcass break-up.
The quantity of balance weights fitted would give concern regarding the uniformity of the re-moulded tyres; generally, re-moulded tyres have very good uniformity as the action of buffing off the worn-out tread tends to reduce any run-out within the original carcass. It is interesting also to note that the worst offender in this regard, was in fact the same tyre on the front of the vehicle which had failed.
It would be a matter for further investigation as to whether the remoulding manufacturer has in fact dynamometer tested the original remould design and/or the subsequent production batches, to prove the ability of the tyres to be operated safely at the rated load and speed in accordance with ECE 108 / 109.
These tyres do not carry the required markings to indicate that they comply with the required testing procedures for the above mentioned standards.
It is therefore my considered opinion that these tyres do not comply with the necessary regulations, governing the sale of such tyres for use on the public highway.
Stephen Alan Green – December 2005.
IT DOES WHAT IT SAYS ON THE TIN...
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They really don't care what they do, do they?Then they say things like "We are not liable for any damages caused..." bunch of cowboys!
What a disaster , I hope that you get everything sorted out with little hassle, it just shows how ridiculus this country is becoming with its obsession with making people unhappy and stressed .......
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Thanks -- interesting. For the uninitiated like me Google found the following:
http://www.retreaders.org.uk/eceregs.htm
and
http://www.retreaders.org.uk/report3.htm
Do you know which particular aspect(s) of ECE108 GCs are non-compliant with?
Several, ..so cant be more exact ,there is an ongoing investigation in to these tyres ,Iwill tell all when things are complete.( win or lose)
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Pray tell us more
I know a wheen of folk via SWAT and Ian Hamilton's Agryll Forest bashes who use GCs and almost all of them swear by them. A very small number have had problems with lugs breaking off on the road -- but other than that they seem to be well thought off.
Was planning to replace our Colway MTs with a set of GCs early next year.
These tyres dont conform to regs ece108...........
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Quick question (well, two - just to be cheeky
):Where's a good place to get a ram type snorkel top (by itself, not as part of a kit)?
Where' can I get the nice metal HT lead clips - the sort that screw down on top of the leads (not sure how else to describe them and I can't find a picture)?
.Paddocks do one...........
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For those of us on a budget - Grizzely Claws - they are great (IMHO), Ive just upgraded from Bronco Dirt Devils (both tpes being 235 x 85 x 16) and I honestly think that the traction off road has improved 25%, certainly in the sticky stuff.
Currently being investigated by trading standards ,after I had problems with Grizzles ,..........try and order a set ?
- and they were Michelins.... seen the same thing with BFGs as well, for some reason the AT's often found on the Japanese market Pajeros seem particularly bad for this.
if they fall to bits I'll go back to BFG's.
):
Reducing Diesel Smokiness
in International Forum
Posted
No need tobe sorry .........do a google search there are more websites than the one linked, ............