[ariendj]

i have noticed for many days now that the buzzing sound appears only when the engine is revved hard.this was never the case before.what could be the issue??
i had expected the sound to go with use but its been weeks and still no change!!!

[km120]

I suspect that to be gear box issue . I am not sure and would like someone to correct me

[SirAlec]

what buzzing sound, revving when in motion or just in neutral gear.

If the sounds comes when the car is stationary, gearbox is out, check something else.

[ariendj]

the sound is more like a wheezing type.and it is present when i press the accelerator pedal when stationary and when i high rev on any particular gear.it feels like as if the car doesn't want to be revved higher than normal which is totally unlike the engine before.

[SirAlec]

I don't suspect the GB, because when you are stationary you are pressing the clutch and GB is totaly disengaged. It might be a case of loose bushes of gear lever assembly.

PS: you did changes your flywheel right.?

[humyum]

I dont see in the part list that he has changed the flywheel bearing.Only the clutch bearing was changed and you should be completly pissed with them for not changing the flywheel bearing as for this one bearing the entire GB will have to downed again.

Go to the same MASS u got this job done from, and ask them to check where exactly the sound is coming from.

Also the wheeshing sound can come from the alternator bearing too.

[anupmathur]

Originally Posted by ariendj

the sound is more like a wheezing type.and it is present when i press the accelerator pedal when stationary and when i high rev on any particular gear.it feels like as if the car doesn't want to be revved higher than normal which is totally unlike the engine before.

Hope you've ruled out the basic things like air filter and belt tensions.
Has the fuel been adjusted for greater fuel economy?
Engine not willing to rev while stationary seems to point to a problem not related to the clutch plate or gearbox!

BTW, is this a carb model?

[SirAlec]

Originally Posted by anupmathur

Hope you've ruled out the basic things like air filter and belt tensions.
Has the fuel been adjusted for greater fuel economy?
Engine not willing to rev while stationary seems to point to a problem not related to the clutch plate or gearbox!

BTW, is this a carb model?

Its definitely a Carb model. As he quoted its a '98 model

[SS-Traveller]

Originally Posted by ariendj

... buzzing sound appears only when the engine is revved hard...

Originally Posted by ariendj

the sound is more like a wheezing type.and it is present when i press the accelerator pedal when stationary and when i high rev on any particular gear.it feels like as if the car doesn't want to be revved higher than normal which is totally unlike the engine before.

Originally Posted by anupmathur

Hope you've ruled out the basic things like air filter and belt tensions.
Has the fuel been adjusted for greater fuel economy?

I've noticed a similar whine on many carb M800 engines - it's usually an intake manifold whistle, heard more often with a fresh air filter in place - completely harmless. Also likely to be a slipping belt. Does your car have an AC?

Do you mean the whining/wheezing sound makes you stop revving the car, or the revs don't rise even if you keep the accelerator floored?

[ariendj]

Originally Posted by anupmathur

Hope you've ruled out the basic things like air filter and belt tensions.
Has the fuel been adjusted for greater fuel economy?
Engine not willing to rev while stationary seems to point to a problem not related to the clutch plate or gearbox!

BTW, is this a carb model?

the car has not been tuned for any better adjustments.the engine can be revved as always and no stopping it but that sound increases as i floor the pedal(accelerator) more.

Originally Posted by SirAlec

Its definitely a Carb model. As he quoted its a '98 model

its a '99 model

Originally Posted by SS-Traveller

I've noticed a similar whine on many carb M800 engines - it's usually an intake manifold whistle, heard more often with a fresh air filter in place - completely harmless. Also likely to be a slipping belt. Does your car have an AC?

Do you mean the whining/wheezing sound makes you stop revving the car, or the revs don't rise even if you keep the accelerator floored?

its just teh sound that annoys me,and its very audible to people around.
the sound rises when the accelerator is floored.

[anupmathur]

Originally Posted by ariendj

the sound is more like a wheezing type.and it is present when i press the accelerator pedal when stationary and when i high rev on any particular gear.it feels like as if the car doesn't want to be revved higher than normal which is totally unlike the engine before.

Originally Posted by ariendj

...the engine can be revved as always and no stopping it but that sound increases as i floor the pedal(accelerator) more.


its a '99 model

its just the sound that annoys me,and its very audible to people around.
the sound rises when the accelerator is floored.

Your posts are confusing!
So the engine can be revved freely, but there is that sound! Right?
Does the sound come at same level in neutral at standstill and with gear engaged and moving?

[SS-Traveller]

Originally Posted by ariendj

its just teh sound that annoys me,and its very audible to people around.
the sound rises when the accelerator is floored.

Remove the air filter and rev to check if the noise is gone or not. If not, remove the water pump drive belt and rev once to check. Don't rev more without the belt, or your engine will overheat.

My guess is it's either a resonance from the air filter, or bearing noise from the water-pump/alternator bearing. Shouldn't be too difficult to diagnose.

[ariendj]

Originally Posted by anupmathur

Your posts are confusing!
So the engine can be revved freely, but there is that sound! Right?
Does the sound come at same level in neutral at standstill and with gear engaged and moving?

sorry to get it all into a confusing state.
ya as you mentioned the sound is same when revved in neutral and also when the gear is engaged.the sound keeps increasing as the engine is revved up higher

Originally Posted by SS-Traveller

Remove the air filter and rev to check if the noise is gone or not. If not, remove the water pump drive belt and rev once to check. Don't rev more without the belt, or your engine will overheat.

My guess is it's either a resonance from the air filter, or bearing noise from the water-pump/alternator bearing. Shouldn't be too difficult to diagnose.

ya il try that too.thanks