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Ford Focus Diesel - Strange Noise After Oil Change

Ford Focus noise oil

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#1 darkkn1ght

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Posted 29 July 2013 - 10:57 PM

Hi I recently took my car (UK FORD FOCUS TD 1.8 2001 MODEL - Diesel 51 Reg) to a local garage for just an oil change. After I got the car back I noticed a strange screeching noise that wasn't there before. The noise only appears when the car has warmed up with the temperature gauge in the middle of hot and cold. It is not there until the car has been driven for about 10 - 15 mins. I took it back to the garage who checked it over and said they could not find any problems apart from a slightly loose air pipe clip which they told me should fix the problem, however once the engine was warm again the noise returned. The noise is more noticeable when the accelerator is pressed and the car revved. The best way to describe the noise is it sounds very like the noise a car makes when reversing, that kind of screeching sound but not as high pitched. It's not constant only when revs go up or accelerator is pressed. It seems to get louder as the car is driven for longer. If i sit in my car after it is warm and then rev my car the screeching noise appears. Does any body have any ideas? It's not a fan belt screeching but a different kind of sound almost like a vacuum cleaner noise...sorry hard to explain! The mechanics listened to it but couldn't pin point where it was coming from.

 

On another note the same garage has just replaced my water pump, and drive and alternator belts etc due to a chirping, squeaking noise when engine was cold...this was when they told me the screeching noise caused by the earlier oil change may of been fixed by a lose air pipe clip but sadly it hasnt.

 

Could it be a faulty oil filter? or even wrong oil? Though wrong oil seems unlikely perhaps a faulty oil filter, could this cause a noise when engine is warm? As mentioned there is no noise until car gets warm after 10 - 15 mins. Apart from the noise the car seems to run fine though the noise is very annoying as it is quite loud.

 

Any advice would be helpful, hope I haven't rambled too much on my first post!

 

TYI

 

Darren



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#2 georgen

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Posted 30 July 2013 - 04:06 PM

you really need to get someone local to have a look at i dont mean the garage you sent it too, failing that take a video of engine bay when warm and making noise so we can hear it. was the noise there before they done all the belts?



#3 olly2097

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Posted 05 August 2013 - 07:04 AM

I've the same problem. Picked up a 1.8 tdci. Drove it for a few hundred miles without issue. Changed its oil. Now after five/ten mins it whines as it goes up the rev range. I put the correct oil in. Changed filter. Car drives fine.

Any idea?

#4 jeebowhite

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Posted 06 August 2013 - 11:19 AM

when yolu say its like reverse, do you mean that as you go up the rev range in forward gears, it makes a whining noise as the reverse gear does, but it makes this noise progressively higher pitched as you continue to go up the rev counter?



#5 olly2097

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Posted 07 August 2013 - 07:29 AM

For me:

No noise before oil change.

Now a whining noise starts around 1800-2000 revs and carries on unless the revs drop again either by changing up or stopping. It whines on overrun as well. It only does this once warm. The first 5 miles or so are silent. The whine doesn't get more high pitch as you rev more.

turbo? No split hoses. Started only when I changed the oil (ford spec, correct filter, correct volume)

Edited by stef123, 07 August 2013 - 11:05 AM.


#6 darkkn1ght

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Posted 09 August 2013 - 07:54 PM

Hi the comment I made about reversing was only the sound was similar...it is probably more like an owl or vacuum, like an air sound. This link below isnt from my car but very similar sound:
http://m.youtube.com...h?v=sfTAI0w_YmQ

I asked an independent mechanic who said it wasn't turbo and could be alternator rod bearing? The noise does seem to come from middle left of engine and to the right of alternator belt, there doesn't seem to be noise from the turbo which is top right of engine, though the noise seems loud when I put ear near turbo inter cooler. Could it be a split pipe maybe? Symptoms appeared after oil change as Olly2097.

I found videos on youtube that sounded very similar but they said it was from blown turbo, though I have no problems accelerating and no loss of. power, and noise doesn't seem to come from turbo. Once I had oil change the mechanic gave me car straight back and didn't run it fr five minutes to let oil circulate, I drove it straight home after paying them. Could that have caused a problem?

In answer to the moderator the noise doesn't get higher pitch and to get it I have to keep the revs around 2000rpm, if I keep them in the exact place with accelerator I can keep the noise going....if I rev hard its not there or only there for brief second as revs pass 2000rpm.

#7 jeebowhite

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Posted 12 August 2013 - 09:59 AM

Sounds to me more like a split hose... Check all the rubber hosing and pipes to ensure that no splits are present, and you may need to replace any hoses. The vacuum pressure is likely to be the cause of this. If the car has been fiddled under the bonnet, its likely that a hose may have been moved / pulled and split.



#8 darkkn1ght

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Posted 18 August 2013 - 09:03 AM

Took my car back, and the mechanics had another good look. They found no split hoses so had a look at cam belt, replaced that and still the same noise. It seem to be coming from back of engine near oil sump, so they took the sump off had a good look couldn't see anything, but felt the noise was vibrating at back of engine. Anyone when I collected it they said they could not find an explanation, however when I drove home the noise now seems to of disappeared! As far as the mechanics were concerned they couldn't find the exact place it was moving from with out stripping the engine. I suspect that by taking the oil sump off has fixed the problem and the noise has now gone. the noise first appeared after an oil change, could 'air' somehow have gotten into the oil when it was changed and created an air bubble which made the strange noise? I can't explain it but it seems taking the sump off and putting it back on has cured the problem albeit by accident rather than design.

#9 jeebowhite

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Posted 19 August 2013 - 08:20 AM

It would be peculiar for an air bubble to cause that sort of racket, and specifically the vibration, but its not an impossibility I guess!

 

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#10 olly2097

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Posted 19 August 2013 - 09:42 AM

Thanks for the info. Did they replace the filter again? I've read online some oil filters can vibrate and make noise. It is a random problem. I may drain the oil and refill it to see what happens.

#11 darkkn1ght

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Posted 20 August 2013 - 10:08 PM

They replaced the filter the first time i went back with an official ford filter it made no difference...only after taking the sump off did the noise disappear....though the garage didn't realize the problem had gone until I drove it home.....the noise hasn't returned thankfully....it was a peculiar noise as you know from the video...my only explanation is air in the oil when the oil change was first done maybe, but could be wrong ....it is very odd

#12 jeebowhite

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Posted 21 August 2013 - 08:14 AM

never the less, its fixed! thats the main thing!



#13 stooge75

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Posted 08 November 2013 - 12:16 AM

This topic has to be the most interesting ive seen in a while. My car has a quieter lower sound than your 'hoot' lol.but i still cannot get to the bottom of what causes it. Logically it sounds like air,but is it vacuum or tiny hole/gap in IC/air pipe? Im dying to find the cause but cant as it only happens every now& then. I dont think it's filter related personally but vibration/resonance can be audibly unusual eh


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