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    2009 Mondeo 2.0 TDCi issues

    Hi,

    I have a 59 reg Mondeo with 85k miles now. Its not seeming to like the colder weather this year as something sounds to be rumbling from under the bonnet, yet i cant see or pinpoint what it is.

    The rumbling only happens when the car is cold, and the electrics are under heavy load (heated windcreen is on, Climate control is on etc).
    I am wondering if it could be the alternator, although it is charging the battery up ok - and it wouldnt explain why it goes away once the car warms up after 10 mins or so. It might just be co-incidental and it might be something loose that is vibrating when the engine changes pitch?

    Anyone got any ideas?

    17 Comments

    When diagnosing a fault, be it a car or a PC always check the basics before donning the doomsday hat.
    1. Have you checked the oil level ?
    2. When was the filter last changed ?
    3. If you changed the oil, are you certain you replaced with the correct oil ?

    If something was loose and vibrating, expansion as the engine warms would not suffice to stop said vibration.

    So if you turn off all the electrics when the car is cold, does it still rumble?
    It could be the alternator belt needs changing, I think these mondeos have a chain cam so unlikely the alternator belt will have been changed.
    Any decent garage will just have a look and listen for you for free.
    Diesel Ford engines arnt the smoothest when cold.

    You didnt buy it off of a Chinese guy did you?? If so, the engine is screwed, he bought it screwed and sold it on screwed, with a few DIY hacks to make it sound OK for a while.
    (Not a joke).

    I refer to the guy as "Tricky Ricky", and he is safely back in China now.

    If i remember correctly the Mondeo have problems with the bottom pulley and tensioner

    google ford mondeo bottom pulley noise
    Edited by: "1Dude" 26th Jan

    Hello

    Is this only to be heard when the car is idle? Do you notice any grating sounds when clutching?

    Ones on our fleet were clocking up 100K in 18-24 months alternator pulley and DMF seemed to have a habit of going!

    dozstanford

    When diagnosing a fault, be it a car or a PC always check the basics … When diagnosing a fault, be it a car or a PC always check the basics before donning the doomsday hat. 1. Have you checked the oil level ?2. When was the filter last changed ?3. If you changed the oil, are you certain you replaced with the correct oil ?If something was loose and vibrating, expansion as the engine warms would not suffice to stop said vibration.


    That is indeed fantastic advice. Once I changed the oil in my PC it ran very 'smoothly'.

    Find the alternator and get a long screwdriver or similar. When it is making the noise place the screwdriver/long bit of metal on the alternator and your ear against that. If it is the alternator bearings you will hear the sound though the metal. Obviously don't put the metal near the moving parts of the alternator. Seem to remember they used to suffer from cambelt tensioner pully noise as well.

    stop looking for problems, when cold the diesel engine is running at 40% ish efficiency, all the cold winter electrics ie window demisters heaters etc add a drain, most likely revs are dropping slightly giving you the rumble. if it worries you go to a garage you trust, dont waste your time sticking screw drivers in your bonnet, everything is covered up on those mondeos anyway.

    Original Poster

    dozstanford

    When diagnosing a fault, be it a car or a PC always check the basics … When diagnosing a fault, be it a car or a PC always check the basics before donning the doomsday hat. 1. Have you checked the oil level ?2. When was the filter last changed ?3. If you changed the oil, are you certain you replaced with the correct oil ?If something was loose and vibrating, expansion as the engine warms would not suffice to stop said vibration.



    It is due a service I'll admit, but waiting for warmer weather before I do it (tend to do it myself)

    Original Poster

    ktm666

    So if you turn off all the electrics when the car is cold, does it still … So if you turn off all the electrics when the car is cold, does it still rumble? It could be the alternator belt needs changing, I think these mondeos have a chain cam so unlikely the alternator belt will have been changed.Any decent garage will just have a look and listen for you for free.Diesel Ford engines arnt the smoothest when cold.



    Oddly yes it seems to. And it only rumbles when it's idling. If you rev the engine it stops. It's belt driven though, they changed it from chain to belt on the mk4

    Original Poster

    1Dude

    If i remember correctly the Mondeo have problems with the bottom pulley … If i remember correctly the Mondeo have problems with the bottom pulley and tensioner google ford mondeo bottom pulley noise



    That sounds possible, I did hear a tiny bit of belt squeal as well thinking about it. Might get timing belt done at the same time.

    Original Poster

    groenleader

    HelloIs this only to be heard when the car is idle? Do you notice any … HelloIs this only to be heard when the car is idle? Do you notice any grating sounds when clutching?Ones on our fleet were clocking up 100K in 18-24 months alternator pulley and DMF seemed to have a habit of going!



    Clutch was replaced at about 40k miles (car was remapped and needed a stronger clutch). Clutch does feel strong still though. Don't think it's the clutch as the rumble doesn't stop when it's pressed. And the rumble stops when electrics are turned off.

    Original Poster

    By the sounds of it, I'm thinking it could be a tensioner pulley or the alternator bearing. Going to put it on ramps this weekend and have a look in that area. (I'm from an engineering background so I'm used to checking rough bearings)

    1Dude

    If i remember correctly the Mondeo have problems with the bottom pulley … If i remember correctly the Mondeo have problems with the bottom pulley and tensioner google ford mondeo bottom pulley noise



    Agreed, it will be this. Turn off the AC to test and it will quite down. Looking about £300 to get it fixed with an uprated crankshaft pulley.....My Jag X-Type has the same engine and I have the same problem...I'll get round to getting mine done at some point.

    btw...you'll find your engine has a timing chain, not a belt (_;)
    Edited by: "Uridium" 26th Jan

    Original Poster

    Uridium

    Agreed, it will be this. Turn off the AC to test and it will quite down. … Agreed, it will be this. Turn off the AC to test and it will quite down. Looking about £300 to get it fixed with an uprated crankshaft pulley.....My Jag X-Type has the same engine and I have the same problem...I'll get round to getting mine done at some point.btw...you'll find your engine has a timing chain, not a belt (_;)



    Definitely a belt. the older Mk3 used a chain. Ford changed it to a belt for the Mk4
    talkford.com/com…ts/

    Oddly, when i turned the A/C off, the rumble diddn't stop. It was only when i turned the climate OFF altogether that it stopped.
    SImilairly, i could have the climate ON with the heated windscreen and the rumble would be there. turn the windscreen off and the rumble stopped. So unless its vibration from the engine causing hte rumble on something loose, i think its likely to be alternator (or belt/pulley) related

    118luke

    Definitely a belt. the older Mk3 used a chain. Ford changed it to a belt … Definitely a belt. the older Mk3 used a chain. Ford changed it to a belt for the Mk4http://www.talkford.com/community/topic/207136-mk4-mondeo-diesel-timing-belt-facts/Oddly, when i turned the A/C off, the rumble diddn't stop. It was only when i turned the climate OFF altogether that it stopped.SImilairly, i could have the climate ON with the heated windscreen and the rumble would be there. turn the windscreen off and the rumble stopped. So unless its vibration from the engine causing hte rumble on something loose, i think its likely to be alternator (or belt/pulley) related



    Just take the alternator belt off and run the car then - that will isolate the issue for you in one fail swoop.
    Having had the mk3 Mondeo, I gave up on investigating funny noises, given I'd fix one and another would appear! They are good engines but they do run rough when cold. I have a mk6 fiesta that shakes when cold but is smooth as silk once warmed up, as does a brand new focus I drive for work.

    Think the cold combined with the temp barely getting above freezing each day is causing problems rather than it just getting cold overnight, it was -1.1C here at noon today!

    Went to take eldest to his karate & auto Espace gears were jumping around all over the place, after letting the engine warm up all the problems went away immediately so putting it down to increased oil viscosity due to cold.

    Cars this time of year eh....
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