engine chirp or sneeze

[smythe]

yes thats what it dos at about 2750 revs in second gear when accelerating,it sort of pause`s and makes that sound for a nano second its also the same sound when you put the air con on and it sounds like its comeing from offside of the engine,the annoying thing is it don`t do it all the time ,any idea`s :eek:

[Peej]

I don't know about the air con bit, but would it be the turbo or is it a petrol?

[2215]

I don't know about the air con bit, but would it be the turbo or is it a petrol?

Sounds like turbo lag :rolleyes:

[spikes]

Hi,
If it is Td4 (BMW) engine, check the rubber pipe that runs from the waste gate of the turbo for splits or cracks. They also tend to work loose in hot climates. A hose clamp on both sides solved my problem with the pipe working loose. You can best see the pipe if the car is on a lift or service pit. Back of the engine on the L/hand side if I recall correctly. (S.Stirley or Verdemar will put us right on the side)
Hope this helps
Spikes

[smythe]

sorry but it`s a 1.8 petrol,as it makes the same sound as when the air con is first put on i was wandering if there is any thing that pressureizes on the cam belt side of the engine or starts to spin as well as the belt driven items that i don`t know about,imagine the sound of spitting(once) really fast or a sneeze,it any dos it at about 2750 rev`s,mainley in second gear only when accellerating.

[TEMPL4R]

In the cam cover you have the tensioner and the water pump. They are to the left and lower left of the cover.

Take the external belts off and see if it still does the noise. If it does and it seems to be in the cam cover, have them checked out.

If it is the water pump bearings or the tensioner, see my other thread for the possible damage.

Chris

[bilge rat]

sorry but it`s a 1.8 petrol,as it makes the same sound as when the air con is first put on i was wandering if there is any thing that pressureizes on the cam belt side of the engine or starts to spin as well as the belt driven items that i don`t know about,imagine the sound of spitting(once) really fast or a sneeze,it any dos it at about 2750 rev`s,mainley in second gear only when accellerating.

are you sure its not just the air con compressor clutch cutting in an out, you say its the same sound, iff you look under the bonnet engine running with air con on watch it for a while youll see the air con clutch cut in and out . you might find even with air con switched off it will still operate when heater controls are on demist. so iff you sitch every thing off and set the heater to floor or face on warm see iff it does the noise then.? them compresser clutches can seem quite noisey, good luck ,, alan.........

[smythe]

The compresser clutch ! That might be just the thing,i have a feeling that you may have helped ,do they need any maintenance ie-can they slip or do you or can you lube them ?cheers

[bilge rat]

no you cant do anything with them they do make a noise .you could check with engine off !. iff it looks ok and nothing is about to fall off or fail , jag x types used to fail quite regular, the end of the compressor clutch used to fall off. the other thing of course is as the compresser cuts in it will put more load on the belt that powers it, so you could get an initial squeel. as well as the click you get from the air con cutting in. check the belt condition and tensioner and tension of belt. dont quote me on this hard to diagnose a noise without hearing it first hand but i hope this may help you , cheers .. alan.........

[smythe]

bilge rat thanks, i`m sure your in the right area,where exactley is the air con clutch so i could do a visual inspection,would it be possible that it could also make the vehical have a very slight pause when it kicks in,your right about it not doing it so much with the air con off,when you say demist do you mean screen direction ?

[bilge rat]

bilge rat thanks, i`m sure your in the right area,where exactley is the air con clutch so i could do a visual inspection,would it be possible that it could also make the vehical have a very slight pause when it kicks in,your right about it not doing it so much with the air con off,when you say demist do you mean screen direction ?

not sure where its positioned on your car not familiar with them, it will more than likely be the biggest unit with two alloy pipes coming out of it. iff you run the car with air con on and eyeball it you should see every so often when you hear the click youll see the outer part of the compressor start turning then when its upto pressure it will cut out,and stop should be easy to see. dont mess with the system as the gas is under high pressure and is very harmfull !!, when i said demist i did mean screen direction, so it wants to be off this and then iff you dont hear the noise your on the right track , good luck . alan.........

[TEMPL4R]

It should be at the bottom right, of the front of the engine. Look under the OSF corner.

Chris

[smythe]

I only use the freelander for going to and from work(because it`s a commercial no good for family)but may take it for a spin in the morning to get the paper ,the wife`s focus(latest one) automatically swictch`s the air con on when the air vent is positioned to screen ,the freelander don`t do this but is the air con clutch still working on and off even though the compresser is not charging ?

[TEMPL4R]

The compressor isn't working most of the time. The clutch comes on, drives the compressor, when the thermostat decides the temperature has been reached, the clutch disengages. This happens all the time. The ECU also increases the tick over when the compressor is running.

There are high and low pressure switches, if you lose the refrigerant, the compressor stops working, too high, the same.

Never have the Air Con on with windows open, they over load and trip out. They are trying to cool the atmosphere. Set to resurculate for a quick cool, then partial fresh air to keep it from going stale.

Chris

[smythe]

hi chris,
could this be early signs of the compresser on it`s way out,it deffinatley dos it more when the air con is on,to the point that as soon as you turn it off the problem stops :eek: helppppppppppppp

[TEMPL4R]

The bearings in the clutch fail, they sound quite high pitched, like a mouse squeak,or a chirp, I suppose. The tell tale signs are rust dust around the pulley.

Chris

[smythe]

can just the bearings be replaced or is it complete unit ?

[TEMPL4R]

Change the clutch/pulley unit.

[smythe]

If it is the clutch/pulley unit ,is it a diy job ?as a guess how much are the parts ?only a couple of 100 miles from 48,000mile service so i`m getting me jobs in order