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A4 2.5V6 cambelt

Discussion in 'A4/S4 forum(B5 Chassis)' started by Graze, Sep 17, 2005.

  1. Graze
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    Graze Member

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    I have the bumper off and am considering changing the two belts. The audi workshop instructions involve very complicated procedures including locking cams from back of engine with special tools. There is a tippex mark on the back of the front right housing. Can anyone confirm that this indicates the belts have been changed at some point by the simple process of 'marking up'? Many thanks.
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  2. imported_VaulterTim
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    imported_VaulterTim Guest

    Graze,

    How many miles has your car covered? If in doubt, change it. It saves you SO much money if it hasn't been changed and then snaps one day!

    There is no sure way of telling simply by looking at the engine whether or not the cambelt has been changed, unless of course it is obviously worn or missing teeth in which case it needs changing! Check the service history if there is one.

    What year is your car? Most modern cars don't need 'marking up', there are usually two arrows on the cambelt that are a set distance apart that simply have to be matched up to the corresponding arrows on the cam pulley(s) and crank pulley. This, by it's very nature, times the engine perfectly since the two are always that same set distance apart.

    I'm sure your manual will cover this procedure if indeed it is the same for your car.

    Hope that helps /ubbthreads/images/graemlins/smile.gif

    Best wishes

    Tim
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  3. Graze
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    Hi Tim, thanks a lot for that - unfortunately the bumper is back on. The mechanic I used was prepared to change the belt using the marking up method [no marks at all on belt] but he suggested there might be some fractional timing discrepancy compared with the Audi workshop instructions which are very complicated. He pointed out the condition of the belt [identical to the new one I have] and also pointed to the tippex mark on the housing which my local Audi specialist tells me is used by mechanics when they change these belts using the 'marking up' method. I changed the belt myself three times on my old Citroen BX, and I'm sure i could do this if I had a few tips. The car's done 90K but that tippex mark is a puzzle. The local specialist said that often down south main dealers will change belts early. This was main dealer serviced until 45K. Unfortunately nothing in the book to say it's been changed and definitely not at 80K, only inspected. I know if I keep the car for peace of mind I should change the belt, I have all the parts, I'm just a bit reluctant to shell out another £350 to pay someone else to do it when i paid top price for the car - 98Avant 2.5TDI on the S, £6.5K....in the garage there was a quattro on 86K - broken belt - £5.6K repairs - 2 new cylinder heads. Hmmm....Cheers, Graham
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  4. jdp1962
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    jdp1962 Grumpy Old Moderator Staff Member Moderator

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    If you don't mind me asking, why did you pay "top price" for a car with what appears to be an incomplete service record?

    To be honest, there is only one piece of advice I can give you, and that is get the belt changed. If you've already got all the parts you need, you should be able to find a good indie who will do it for less than £350. Where in the UK are you, by the way?
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  5. imported_kris_tdi
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    imported_kris_tdi Guest

    my dad changed the cambelt on my a4 2.5 tdi, now he worked with engines for 25 years as a job and said it was a complete cnut to do.
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  6. CraigM
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    CraigM Member

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    Why don't you try and contact the previous owner and find out if they had the belt changed?
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  7. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    Unless it's in the book with a receipt I wouldn't trust the previous owner, get it done.
    If Audi did it then they'll be able to check on their system. Everything is logged centrally from when the car first enters the UK, worth a call to your local dealer.
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  8. Graze
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    Graze Member

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    Good point Jeff - truth is there are so few of these cars around I don't really know what 'top price' is. The car looks very clean indeed inside and out and drives like a dream. Local indie has quoted £300 +vat. Will check service history with Audi first. Thanks to all those who responded.
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  9. CraigM
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    CraigM Member

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    Might be worth checking how much Audi want to change it.

    My 2.8 is going in for its cambelt change in a week and Audi are charging £422 and that includes changing the tensioners.
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  10. jdp1962
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    jdp1962 Grumpy Old Moderator Staff Member Moderator

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    Audi will always charge more than an indie. It is the 11th Commandment.
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  11. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    Hate to mention it but make sure they do the water pump, otherwise you'll be paying another £422 in about 15k miles time (if you have an engine left).
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  12. CraigM
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    I'm getting the water pump done as well - it made sense to do it at the same time.
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  13. Graze
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    Graze Member

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    Yeah, already sussed that one from browsing this site. New water pump is sitting in a box. I've never owned an Audi before....can anyone tell me if reliability compensates for the high cost of getting anything done?
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  14. jdp1962
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    jdp1962 Grumpy Old Moderator Staff Member Moderator

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    [ QUOTE ]
    Yeah, already sussed that one from browsing this site. New water pump is sitting in a box. I've never owned an Audi before....can anyone tell me if reliability compensates for the high cost of getting anything done?

    [/ QUOTE ]

    Not really, if the JD Power/Top Gear surveys are anything to go by. Don't confuse high build quality with mechanical reliability. If you want the latter, buy a Honda or Toyota.
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  15. imported_VaulterTim
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    imported_VaulterTim Guest

    [ QUOTE ]
    can anyone tell me if reliability compensates for the high cost of getting anything done?

    [/ QUOTE ]

    Ahhh... the $64000 question!

    Of course, Audi would say yes. 'You pay for the quality of our top crafstmen and their work' or some other bull-doodoo like that.

    But like so many cars these days it really is down to that particular car, it's previous life etc. etc. Any car can be reliable on a budget if it's well looked after and the owner has the skill to do the work himself /ubbthreads/images/graemlins/wink.gif At the other end of the scale, if it's completely looked after by the main dealer all it's life it can be a nightmare (call me cynical if you like but I just 'can').

    And in my opinion a lot of it boils down to the snobbery of big names and marques considering themselves to be worth more than any other.

    Just take a look at all the comments on the forum about using a good independant after the car has come out of warranty. It's just not worth paying all that money in a lot of people's opinions...

    T
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  16. Graze
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    Thanks guys for all your input - wonder if you can help me with something else. Bought car about 6 weeks ago. No smoke from rear end. But brake light warning sign kept coming on along with the chime. Thought I'd just forget about it as brake lights worked OK. A few days ago noticed while stopped in traffic lots of whitish smoke. Smell of burnt gases too. Turned engine off. When traffic started moving again, a bit of blue smoke. Engine power, water temp etc all same as usual.Went to local indie who connected laptop up and said the brake light switch needed replacing. He said there was nothing wrong with the engine but because a fault was detected the ECU would not operate the engine normally - or that's my understanding of his meaning anyway. Implication seemed to be that changing the switch would make the smoke go away. Any comments on this? Two weeks ago there was no smoke. Now all this smoke - one more thing, yesterday the glow plug warning light started flashing. Indie said this was because of the faulty brake switch. All new stuff for me - my last car had no computer. How can a faulty brake switch, or 'sensor' affect the engine management system, or did i msunderstand and i have a turbo fault?
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  17. Graze
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    Forgot to add - local Audi dealer had to order part so won't know till next week after it's fitted by indie what result will be.
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  18. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    White smoke? are you sure it wasn't steam? hopefully not as this would be the head gasket.
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  19. imported_kris_tdi
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    imported_kris_tdi Guest

    white smoke could be a number of things, not just head gasket.
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  20. imported_VaulterTim
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    imported_VaulterTim Guest

    Brake warning light? Smell of burnt gases? Have you actually checked your brakes!?
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  21. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    As I said if it's steam and not smoke then it's the head gasket.
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  22. Graze
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    It's more blue than steam but think that it's been smoking because these last few weeks I've just been pootling around. Did a longer run today and now no smoke. Most of the time in 6th gear the engine hardly ever gets above 2000revs due to said pootling. Does this make sense, that it needs a good blow out from time to time?
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  23. imported_kris_tdi
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    imported_kris_tdi Guest

    if there is a bit of blue smoke, it could be the crank case breather is or partically blocked, take it off and clean it out.
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  24. Graze
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    it's definitely blue smoke. There's no smoke starting from cold but it seems to build up, especially when idling after about 5 miles. After about 20 miles it seems to disappear.
    Whereabouts is the crankcase breather situated?
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  25. Graze
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    The smoke is blue and quite a lot of it. 50% of the time it's there, always on idle. Always when engine's warmed up. If it's there on idle it's there in the mirror accelerating away. If no smoke on idle, no smoke on acceleration. Doesn't matter whether there's been hard acceleration or not before coming to a stop. Engine uses no oil, turbo works fine, no strange noises and mpg about 48. But when it smokes, it really smokes. It's so bad in traffic I have to turn it off. Any ideas what it might be very much appreciated!
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  26. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    Well it sounds like valve stem seals to me, but to be honest, i didnt think Audis suffered from this
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  27. imported_kris_tdi
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    imported_kris_tdi Guest

    as above, sounds very much like the crank case breather is blocked, on my old car the pipe got kinked and i had the exact same symptoms.
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  28. Graze
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    Kris - it's definitely the crank case breather. But where is it? And what does it look like? Is it poss to cleaner it? Local specialist said I'd need to buy a new one.
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  29. imported_kris_tdi
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    imported_kris_tdi Guest

    not exactly sure where it is on this engine without removing the cover. it will be a rubber pipe going between one (or both, i dont know) of the cylinder heads and into the intake pipe before the turbo.
    just had a quick look on mine and i can see a hose going in just before the turbo.

    wouldnt order a new one just yet, best off having a look and seeing if its damaged or just blocked up with oil sludge.

    let me know if you get stuck.
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  30. Graze
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    Graze Member

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    Thanks Kris - will check it out tomorrow.
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  31. Graze
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    Kris, found the pipe - it's just in front of the turbo and connects behind the turbo to the air intake. Took it off but the pipe was clear. Is there something else I need to get at to take off and clean, like the circular thingy the pipe is connected to?
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