Saturday, 27 June 2015

finding spares

Search words - hymer spares mercedes spares spare parts

I just wrote this in reply to someone asking where to get spare parts - and I thought it would be good for reference so I am repeating it on the main feed so it can be searched for in future.

Perhaps somebody could do the same with reference to Fiats - about which I am afraid I know very little!

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For Hymer spares your first port of call is Brownhills, who are the main Hymer dealers in the UK - ask for Darren Leadbetter who is the old Hymer spares expert. d.leadbetter@brownhills.co.uk. But be aware that although they are pretty good, some parts can be expensive - even though if you mention Classic Hymers, you will get a 10% discount. Many habitation parts are "generic" - ie not Hymer specific - examples are the blinds - made by Seitz, all the gas stuff - Truma - fridges - Dometic and many other bits - like taps and light fittings and bulbs and bit n bobs - all this stuff can be sourced from caravan breakers, although it can be quite a task to identify what fits where. 

Google for "caravan breakers" there are loads....

I have also had Hymer spares from O'Leary Motorhomes

Premier Motorhomes Chichester 01243 511189 Chris - recommended by Justin

Please add you own good suppliers for Hymer habitation parts here ....

There are now getting some parts that are almost impossible to get - habitation door hinges are an example.

The wing mirrors are a standard truck part, and quite hard to find. 

As for the Mercedes - it's a mixed bag. Wander in to a Merc main dealer with your vin number, and watch them shake their heads and give you the "don't see many of these nowadays" routine, and arrange an overdraft before you go. The truth is that the Merc parts computer does still list the parts, but they are spread all over the country, and sometimes they just can't be bothered to do the work locating them. These are guys who work on £80k SLK's at £120 an hour....so forgive them for not giving a damn about your 20 year old pre Sprinter chassis. So avoid main dealers if you can (except in poorer EU countries like Portugal, where I have found them to be much much better)

What you need, and I have said this many times on here, is to forge a friendly relationship with a local light commercial garage, and preferably one with an owner who is in his 50's as he will have done his apprenticeship on these old chassis back in the 80's and 90's. He will have his own set of contacts for spares. Many parts are "pattern" parts and readily available - eg only a fool buys an oil filter from a Merc dealer!

And then there are the breakers. If you look around our roads you wonder that given the fact that these 80's and 90's pre Sprinter Merc vans and chassis - 410D (yours) 310D (5 series), and all the others - 208, 209, 409, 508 .....etc etc ...... are so incredible durable and long living.....where the hell are they? The only ones you see still plying their trade are either specialist vehicles, or minibuses, plus the odd hippy van conversion - they are THE van for hippy vans - just take a walk around any festival camp site. It took me a while to find the answer - they are all in Africa! Once their resale value in Europe dropped to a certain level, instead of scrappage, they were loaded wholesale into containers and shipped to Africa, where they are still running to this day, loaded to the gills with livestock and people. I found this out when I spent 2 winters in Morocco. 90% of all light commercials there are Mercedes T1 and T2, they just run and run and run, and they keep them on the road with ingenuity and hammers! There are breakers yards all over europe - including a couple in the UK, who hoover up all of what's left of these vehicles, and send containers of spares over to Africa. So now you know!

Luckily these guys have yards and stock, and the process is never ending, so it is possible to get spares from them before they ship out. There is a place in Cornwall I have used - a very nice guy, who found me a very rare high ratio gearbox for my S700.

And of course there are still plenty of traditional breakers around who get the occasional scrapper in.

So all in all - spares are available for these Merc chassis - you just have to be willing to do the work, and if all else fails, there are our German friends - they have no problem with spares, for the obvious reason that for every old Merc over here, there are still 10 over there. They can get pretty much anything you want.

Old English cars and commercials, Saltash, Cornwall 01752 851158 ask for Roy. 

Dronsfields Oldham 01706 883910 (can be a bit dear but very knowledgable)

erithcommercials.co.uk - never used them.....

http://www.mercman.co.uk/

More contacts here please!


Thursday, 25 June 2015

Spare parts for old Merc Hymers

Ron Bentham For Hymer spares your first port of call is Brownhills, who are the main Hymer dealers in the UK - ask for Darren Leadbetter who is the old Hymer spares expert. d.leadbetter@brownhills.co.uk. But be aware that although they are pretty good, some parts can be expensive - even though if you mention Classic Hymers, you will get a 10% discount. Many habitation parts are "generic" - ie not Hymer specific - examples are the blinds - made by Seitz, all the gas stuff - Truma - fridges - Dometic and many other bits - like taps and light fittings and bulbs and bit n bobs - all this stuff can be sourced from caravan breakers, although it can be quite a task to identify what fits where. 

There are now getting some parts that are almost impossible to get - habitation door hinges are an example.

The wing mirrors are a standard truck part, and quite hard to find. 

As for the Mercedes - it's a mixed bag. Wander in to a Merc main dealer with your vin number, and watch them shake their heads and give you the "don't see many of these nowadays" routine, and arrange an overdraft before you go. The truth is that the Merc parts computer does still list the parts, but they are spread all over the country, and sometimes they just can't be bothered to do the work locating them. These are guys who work on £80k SLK's at £120 an hour....so forgive them for not giving a damn about your 20 year old pre Sprinter chassis. So avoid main dealers if you can (except in poorer EU countries like Portugal, where I have found them to be much much better)

What you need, and I have said this many times on here, is to forge a friendly relationship with a local light commercial garage, and preferably one with an owner who is in his 50's as he will have done his apprenticeship on these old chassis back in the 80's and 90's. He will have his own set of contacts for spares. Many parts are "pattern" parts and readily available - eg only a fool buys an oil filter from a Merc dealer!

And then there are the breakers. If you look around our roads you wonder that given the fact that these 80's and 90's pre Sprinter Merc vans and chassis - 410D (yours) 310D (5 series), and all the others - 208, 209, 409, 508 .....etc etc ...... are so incredible durable and long living.....where the hell are they? The only ones you see still plying their trade are either specialist vehicles, or minibuses, plus the odd hippy van conversion - they are THE van for hippy vans - just take a walk around any festival camp site. It took me a while to find the answer - they are all in Africa! Once their resale value in Europe dropped to a certain level, instead of scrappage, they were loaded wholesale into containers and shipped to Africa, where they are still running to this day, loaded to the gills with livestock and people. I found this out when I spent 2 winters in Morocco. 90% of all light commercials there are Mercedes T1 and T2, they just run and run and run, and they keep them on the road with ingenuity and hammers! There are breakers yards all over europe - including a couple in the UK, who hoover up all of what's left of these vehicles, and send containers of spares over to Africa. So now you know!

Luckily these guys have yards and stock, and the process is never ending, so it is possible to get spares from them before they ship out. There is a place in Cornwall I have used - a very nice guy, who found me a very rare high ratio gearbox for my S700.

And of course there are still plenty of traditional breakers around who get the occasional scrapper in.

So all in all - spares are available for these Merc chassis - you just have to be willing to do the work, and if all else fails, there are our German friends - they have no problem with spares, for the obvious reason that for every old Merc over here, there are still 10 over there. They can get pretty much anything you want.

Monday, 22 June 2015

Mercedes Engine Cooling Fan issues ......

This is a query about cooling on the D310 Merc engine. The electric fan on our 1994 S555 cuts in regularly on motorway journeys at 50-55 mph even though the external temperature is well under 20C and the engine temp gauge is only around or maybe just above the halfway mark. Is this normal or is there some way I can adjust the thermostat on the fan? I wouldn't mind except that it's really noisy. Thanks for any advice.
Like · Comment · 313
  • 3 people like this.
  • Christian Skeels Is it an OM602 engine? As far as I am aware, the original fan was some sort of viscous coupling that engaged when a set temperature was exceeded. That's certainly what I have on my S550. These were problematic though and it's quite possible it has been replaced with an electric fan during the van's life. I am not aware of any electric fans being fitted as standard pre-1995. Happy to be corrected though!
  • Richard Benson Should be a 602 engine Christian, and unless modded it would have a viscous coupling. Mine only comes on on long climbs in the mountains when it's rate ot
  • Ron Bentham Unless you can see what is obviously an extra electric fan bolted on the front of your radiator - then you don't have one! What you do have as CS says, is the original Merc viscous coupled fan - it just sounds like an electric fan! I am very familiar with this problem - it drove me nuts for years on my old S700, which is basically the same engine. The fan looks like it is driven by the fan belt, and it is, but if you look closely you will see that the aluminium centre of the fan has what looks like cooling vanes. Inside there is a clutch which is operated by a fluid. When the fluid gets hot, it expands, engages the clutch, and power from the belt is transmitted to the fan blades, which speeds sucks more air through the rad, and cools the water, which cools the engine, which then runs cooler, so the air flowing through the rad gets cooler, which disengages the clutch in the fan..... And the noise you hear like an aircraft engine is the noise the fan makes when it is under full load. And unfortunately the VCF is a bit of a blunt instrument, and with no way to adjust it - so over it's life the point at which it cuts in and out changes slightly, and if you are unlucky, as you are and I was - it can cut in and out at cruising speed.

    You will notice the temp gauge needle rising and falling slightly as the cycle happens.
    16 June at 19:50 · Edited · Like · 3
  • Yes, same on my 1985 OM617. In it comes, with a big whine. Mine seems to run a bit hot, so it kicks in fairly frequently. Anyone here done a flush of their water system, to save me hunting down the best method?
  • Ron Bentham So what you end up with is a positive feedback loop - the fan cuts in, the temp drops, the fan cuts out, rinse and repeat.

    The bad news is you can do nothing about it. There is nothing to adjust. The options are either to completely replace the fan assembly, which is what I did, at a cost of around £400, or the other option is to add an electric fan on the front of the radiator, with an adjustable thermocouple which senses the engine coolant temperature, and powers the fan accordingly. This should have the effect off keeping the engine temp down below the threshold at which the original fan does it's annoying in and out shake it all about routine. It would be even better to have the thermocouple control in the cab, so you can adjust it as you go. This is a reasonable DIY project if you fancy it - the fans are on Ebay for less than £50.....and the other bits are cheap - you could do it in a day if you know what you are doing.

    You may ask why did the otherwise infallible Mercedes design team do it this way in the first place - the answer is that when the fan is operating, not only is it noisy, but it takes quite a lot engine horsepower - which you may have noticed as a drop off in speed when the fan cuts in, especially on those long motorway hills - often necessitating a change down in gear. So they tried to design a system that keeps maximum horsepower to the wheels, and only to the fan when necessary. And it does work, usually you don't even notice. But unfortunately in this case the fan system hasn't aged as gracefully as the rest of the engine. The problem is even more pronounced sometimes with those vans that have been turbo'd and intercooled, as the intercooler sits in front of the main radiator and upsets the airflow even more. Basically it would have been better if merc had fitted an electric fan as standard.

    Hope this helps.
    16 June at 19:51 · Edited · Like · 2
  • Nigel Pigott Fantastically helpful response, as ever – many thanks Ron and others. The electric fan solution seems very attractive. I'm guessing something like this: http://ebay.eu/1JTfLBH. There seems to be a mounting kit with it so I just need to find a suitable vacant slot on the fuseboard to wire it in (there seem to be lots) and then I might be able to listen to Radio 4 without turning the volume up to 11.



    14" AeroLine Universal Electric Radiator 12v Cooling...
  • Ron Bentham Yes thats similar to what I saw - just do a bit more research as to how the fan cut-in is actually controlled.

  • Ron Bentham That is exacly what you want - cheers xxx - those instructions are clear and concise. In my case it will be more complicated because when the intercooler is fitted, space is tight. I am hoping I can squeeze an electric fan in between the two. But first I will see how the newVCF I am having in the new S700 fares next week.
  • Nigel Pigott Thanks xxx and Ron. Almost ready to put in my order but having measured up I think I will need to go for a 12" fan as there is a fixing bar across the front of the radiator that would prevent a larger one being mounted flush. EBay has separate thermostat kits with relay and controller for under £10.
  • Ron Bentham Please post back when you have a result!
  • Gary Garage Johnstone Can I chip in on this thread.... I used to fit these type fans to TVR's and the way to control these units was to use a thermo sensor that was slotted into the top radiator hose (being the hottest point) the sensor was connected to a long fat flexi tube which then was attached to an adjustable temperature control that needed no physical wiring apart the fan as it activated the fan when it felt the need at the temperature set..http://www.ebay.com/.../Universal-12V-0-120.../171787644274



    Speedmaster adjustable fan wiring kits are designed to...
  • Nigel Pigott Thanks Gary. I was looking at this one as I don't really want to pay $23 postage: http://pages.ebay.com/link/?nav=item.view&alt=web... . Looks similar? Off to Pembrokeshire for a week or so next week so probably won't be able to do anything until we get back.

Tuesday, 16 June 2015

vicious viscous fans

This is a query about cooling on the D310 Merc engine. The electric fan on our 1994 S555 cuts in regularly on motorway journeys at 50-55 mph even though the external temperature is well under 20C and the engine temp gauge is only around or maybe just above the halfway mark. Is this normal or is there some way I can adjust the thermostat on the fan? I wouldn't mind except that it's really noisy. Thanks for any advice.
  • 2 people like this.
  • Christian Skeels Is it an OM602 engine? As far as I am aware, the original fan was some sort of viscous coupling that engaged when a set temperature was exceeded. That's certainly what I have on my S550. These were problematic though and it's quite possible it has been replaced with an electric fan during the van's life. I am not aware of any electric fans being fitted as standard pre-1995. Happy to be corrected though!
    5 hrs · Like
  • Richard Benson Should be a 602 engine Christian, and unless modded it would have a viscous coupling. Mine only comes on on long climbs in the mountains when it's rate ot
    5 hrs · Like
  • Ron Bentham Unless you can see what is obviously an extra electric fan bolted on the front of your radiator - then you don't have one! What you do have as CS says, is the original Merc viscous coupled fan - it just sounds like an electric fan! I am very familiar with this problem - it drove me nuts for years on my old S700, which is basically the same engine. The fan looks like it is driven by the fan belt, and it is, but if you look closely you will see that the aluminium centre of the fan has what looks like cooling vanes. Inside there is a clutch which is operated by a fluid. When the fluid gets hot, it expands, engages the clutch, and power from the belt is transmitted to the fan blades, which speeds sucks more air through the rad, and cools the water, which cools the engine, which then runs cooler, so the air flowing through the rad gets cooler, which disengages the clutch in the fan..... And the noise you hear like an aircraft engine is the noise the fan makes when it is under full load. And unfortunately the VCF is a bit of a blunt instrument, and with no way to adjust it - so over it's life the point at which it cuts in and out changes slightly, and if you are unlucky, as you are and I was - it can cut in and out at cruising speed.

    You will notice the temp gauge needle rising and falling slightly as the cycle happens.
    3 hrs · Edited · Like · 3
  • Ron Bentham So what you end up with is a positive feedback loop - the fan cuts in, the temp drops, the fan cuts out, rinse and repeat.

    The bad news is you can do nothing about it. There is nothing to adjust. The options are either to completely replace the fan assembly, which is what I did, at a cost of around £400, or the other option is to add an electric fan on the front of the radiator, with an adjustable thermocouple which senses the engine coolant temperature, and powers the fan accordingly. This should have the effect off keeping the engine temp down below the threshold at which the original fan does it's annoying in and out shake it all about routine. It would be even better to have the thermocouple control in the cab, so you can adjust it as you go. This is a reasonable DIY project if you fancy it - the fans are on Ebay for less than £50.....and the other bits are cheap - you could do it in a day if you know what you are doing.

    You may ask why did the otherwise infallible Mercedes design team do it this way in the first place - the answer is that when the fan is operating, not only is it noisy, but it takes quite a lot engine horsepower - which you may have noticed as a drop off in speed when the fan cuts in, especially on those long motorway hills - often necessitating a change down in gear. So they tried to design a system that keeps maximum horsepower to the wheels, and only to the fan when necessary. And it does work, usually you don't even notice. But unfortunately in this case the fan system hasn't aged as gracefully as the rest of the engine. The problem is even more pronounced sometimes with those vans that have been turbo'd and intercooled, as the intercooler sits in front of the main radiator and upsets the airflow even more. Basically it would have been better if merc had fitted an electric fan as standard.