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Help strange noise from my engine after switching off

Discussion in 'Land Rover Freelander' started by Gemma, Feb 21, 2005.

  1. Gemma

    Gemma New Member

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    Hello Can anyone help me i own a freelander TD4 thats great however at times, [intermittently] strange sounds come from the engine!!. This is usually once i have switched off the engine, there is a high pitched almost electrical sound mainly from the left side. After 10 - 20 seconds it stops suddenly, this happens mainly after short journeys on cold days, however sometimes it makes a different noise that is alot louder like a low engine noise again once the engine is off and it will stop abruptly. As its only intermittent its difficult for a garage to hear the sounds, can anyone help on what can be the matter with my car as i'm beginning to loose confidence with it. Thanks
     
  2. Graham Wilkinson

    Graham Wilkinson Active Member

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    On the left Hand side just behind the bumper is a Diesel heater just behind the bumper, it has an exhaust that comes out just underneith When you hear the noise check if hot air is coming out of it. i think it is there to give hot air instantly from the heaters when the air con is on and turned to hot. I noticed the same thing the other day whilst servicing a friends freelander!
     
  3. westfaliaman

    westfaliaman New Member

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    Gemma,i had the same "problem" on my recently purchased TD4 and thought it was a fault.However it is only the FBH (fuel burning heater)located under front bumper at lower left side.It burns diesel fuel to speed warm up of engine and heat water for warm air for interior heater.It comes on automatically apparently if temperature 5 degrees or below ,after the engine has been running for 30 seconds and providing temperature of the heater case itself is below 65 degrees.When running you can also hear a clicking noise from behind panel behind right side rear passenger seat,this is the electric pump supplying the FBH.The heater runs for about 20 seconds after you switch off engine depending on engine temp (ie,if a short run).The noise will sound like an electric fan (like the engine cooling fan in fact).Unfortunately the owners manual does not seem to explain all this! I found the above answer on the net.
     
  4. Fitz

    Fitz New Member

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    I wish my Disco had one of them.
     
  5. tigapiglet

    tigapiglet New Member

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    so do i
     
  6. Gemma

    Gemma New Member

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    A big thank you to everyone who replied and helped with my query my mind is at rest now Thanks very much for a while i thought the car was going to explode.
    Another query does anyone know where i can get landrover badges for my freelander ive had all of mine stolen and the local garage can get them but for £61 which seems a lot to me. Thanks Gemma
     
  7. markhorne

    markhorne New Member

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    Have a look on Ebay for the badges (Land Rover and Freelander ones are both on there). Just type in "Land Rover Badge" and you should find what you're looking for, cheers, Mark
     
  8. SHU-MAN-SHU

    SHU-MAN-SHU New Member

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    I wish my FBH had a dashboard switch so I could switch it off, tremendous waste of fuel on short journeys.
     
  9. Trewey

    Trewey Cockernee, Pasty munchin bastid.

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    you can fit a switch. there's a fred on here somewhere that tells you how - try a search.
     
  10. TD4&ABIT

    TD4&ABIT New Member

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    :p I have had a look at the circuit for the FBH and if you want to fit a dashboard switch to stop the FBH from starting this is how its done: locate the air temp sensor and connector, (behind r/h/s of front bumper) the connector to the sensor is co714, pin 1 (brown/yellow) is a feed signal from the engine control module (ECM) and pin 2 (slate/green) is the signal feed to the FBH, the temperature sensor is a normally open switch and closes when temperature drops to 5c when it closes the feed from the ECM flows through the switch to the FBH . So you can cut the wire (slate/green) going to pin 2 somewhere in the loom, extend both ends of the wire to the dashboard and fit a switch, as the feed is only a signal and not the power feed you can fit a low current switch, no need for a relay or a high current switch. Hope this helps.:)
     
  11. Griz005

    Griz005 New Member

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    Hi, you kindly told how to fit a switch to turn off fbh, is there a way to fit a dashboard switch so you can switch the fbh on & off at will, & not rely on temp sensor. Thanks..................
     
  12. TD4&ABIT

    TD4&ABIT New Member

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    Hi, you could take the wires from the temp sensor to a dash switch but then you will have to use a high current switch or a relay with a low current switch, why would you want the fbh to come on when the engine has warmed up?
    I turn my fbh off at will with the dash switch and then flick the switch on if I want the fbh to work in the normal way.
     
  13. willo

    willo Well-Known Member

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    Hi,
    Excuse my ignorance but when you just take the two wires off the sensor and instead connect them to an high current switch on the days, what values does such a switch need to have please ?? Totally no idea what you mean with high current in 12V ? (No technician, just trying, for ages already to be able to switch off the fbh, as I am doing mostly short trips the fbh, during wintertime, almost always stops IN the garage when returning home, with the typical smell of burned fuel and the also typical fumes, which my wife hates and especially when the laundry is hanging in the garage to dry...:D , so for these short trips I'd switch it off all the time and only leave it "on", {as if the sensor was there}, when a long/er trip is ahead). Thanks. (Found out in the past the outside temperature sensor was the key to the problem but couldn't find a spot where to "interrupt" the cables, now with winter ahead this becomes again actual as in the past years I forget all about in the summer....:( :eek: :eek: )

    What I forgot to mention yesterday was that in my opinion only one lead to or from the sensor can be interrupted with a switch if, as in my case, I will still be able to have the fbh function as it was designed, through the sensor that is. I have a switch available of 230V and 15A, would that be ok to serve as high current switch as mentioned by TD4&ABIT ?? Thanks.
     
  14. TD4&ABIT

    TD4&ABIT New Member

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    Hi Willow,
    had a second look at the circuit for the fbh, it looks like you can use a normal type dash switch (low current about 2amp, 3amp to be safe) as the temp sensor is only a signal (low current)to the fbh.
    If you remove both wires from the temp sensor (brown-yellow & slate green) to the dash switch it will turn the fbh on all the time when the switch is on, when you turn the switch to the off position the fbh will be turned off and will not start again until you turn the switch to the on position.
    Hope this helps.
     
  15. willo

    willo Well-Known Member

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    Thanks for the info. but my other problem was also where to pick up the wires (where is co714 located?) as the only alternative as I saw was to undo the undertray and try to see if I can get hold of the wires to/from the front sensor and cut either of them and pull a double wire from there into the cabin, near the engine connect the two ends of the cut wire onto the newly pulled double wire and in the cabin the switch on that new wire. That way I could cut it off all the time if I want and when switch "on" the fbh would/will work as designed with the outside temperature sensor. Having to take off the undertray etc. withhold me a little by progressing with this item, if you see what I mean. If I knew a location near the cabin where I could pick up either of these wires (brown/yellow or slate/green) it would be much easier.
     
  16. TD4&ABIT

    TD4&ABIT New Member

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    Hi willow,
    sorry can't help with locating the wires in the loom or in near the cabin, I took the wires from the sensor.
     
  17. willo

    willo Well-Known Member

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    Thanks anyway,
    Guess I'll have to take the undertray out (to avoid I have to take the front bumper off) and see if I can reach these wires from beneath. Thanks again and good luck.
     
  18. Harleydee

    Harleydee New Member

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    Great Post thanks. Just changed my Air, turbo and crankcase filters, put it all back together started the td4, all seemed ok, turned it off only to hear the fan noise and see fumes/ condensation coming from under the engine, immediate panic as I thought I had caused a fault and the thing was going up in flames !! I opened the bonet and was about to disconnect the battery when it stopped. Must admit I did think it sounded and smelt like my diesel webasto heater on the camper, had a look on here and hey presto IT IS A DIESEL HEATER. MAny thanks all I can now sleep tonight. :)