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Discussion Starter · #1 ·
Hey folks, I traded my 2002 E46 330ci M sports coupe 2day which done 60k, for a 2001 M3 MANUAL that has done 104k on the clock. It had its ISPII @ 93k from indep. specialist, and an oil service @ 104.

I'm a bit concerned on the power this car has (lack of...) firstly is it the way I'm driving it? On the 330 coupe there is alot of torque on the low RPM range and on 5th gear on motorway. When I was testing the M3 I noticed it had to be revved up to 3-4k mark to get any comparable response to my 330. And also, on the motorway 6 gear 70mph @ 2000rpm there is hardly any power, same goes for the 5th gear although not much more??? Does this car need to be revved then compared to the 330? Or does the sport button need to be engaged for the response to be equiv.? Now - I know vanos come into mind but I thought the E36 M vanos were problematic not the E46 version or could I be wrong, could it be the transmission/gearbox? Sounds like I traded a gd car for a duff M3 :frown

Also, when engaging clutch or changing gear, there is a sound of thudding/clunking around the back - what could this be? I've also noticed that when switching off the engine it leaves a distinct tructor/rattle noise from the back/front of car...

Obviously I'm gonna get the indep specialist to inspect it, but I only have so much money atm to ask them to look at it - does anyone kno how much labor time the above or any suggested parts going to take?

Any suggestions would be greatly appreciated.

P.S. i have a 6 month warranty by Auto Protect Administration limited gold cover for a calim value of £1000 does anyone know how this works for my car to get fixed if they find anything wrong? Or does this claim cover the looking over of the car?
 

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I would seriously advise you take the car to have the codes read on the ECU. The E36 M3 is - touch the accelerator and off she goes - No messing!!!:lol

I would expect exactly the same from the E46.
 

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when i claimed on my warranty , i took it to a garage asked if they would do warranties,they said yes, but some like you to pay and then you have to claim off the insurance usually takes about 3-4 weeks to get your money back, if i were you i would get them to check all of the car just for piece of mind,had abit of sh#t when i first got my car i had it on the ramps the same day, the car had 12months mot and we found the two rear tyres were cracked on the inside and hanbrake not working on one side!!! took it back and complained got two new tyres new rear discs pads and shoes , foc, you always have abit of s##t when you buy new car unless your lucky,try not to get ya sel all stressed im sure it will get sorted and you then can start enjoy it ,good luck mate
 

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Yes - i will do that first, but what about the other problem i have with the noise issue?
The Noise.......if its a kind of a rattle or chatter when switching off the car and if it seems to be coming from under neath- then that could be the gearbox, Seen many older beemers suufer from this, especially the E36 M3 Manuals, on those cars you just have to live with it as it's just one on the characteristics of the car..............other makes do suffer from the same kinda charactersitc aswell.....does'nt mean the box is shot.

But not seen many on the E46 M3's suffer from this to be honest, may be 2 or 3 over the years.

As for the knock you are getting when engaging gears.........almost all the E46 models with manual box's suffer from this. most likely cause is that when the gear is engaged, there is a few mm of backlash between the gearbox bushing at the propsahft end, which causes a kind of thud.
personally would not worry about it unless it is abnormally loud...but some level is acceptable, you wont cure it 100% but if you engage gears carefully i.e slowly.....may not notice it.
 

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Discussion Starter · #6 ·
Thanks for the info. much appreciated. Well...it is a little loud for my taste - is there anything i can replace in terms of making it quieter?

BTW - how much is an m3 gearbox if worst comes to worst??? How much are secondhand ones normally go for?

Also, can someone tell me if the VANOS are prone to fail on these M3's?
 

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Thanks for the info. much appreciated. Well...it is a little loud for my taste - is there anything i can replace in terms of making it quieter?

BTW - how much is an m3 gearbox if worst comes to worst??? How much are secondhand ones normally go for?

Also, can someone tell me if the VANOS are prone to fail on these M3's?
Vanos failure on the E46's is not as common as the older E36 evo's.

But a simple diagnostic scan, either from an indepenadant or dealer will out line any issues with regards to the power output you are getting and also will tell you if the vanos is operating within spec.
 

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Ok - thanks for the VANOS info - but will fault codes highlight any seals that have gone on the unit?
In the Vanos??..............not really but if the seals are leaking then it should be evident from looking at the unit, I know that the older Evo's had a habbit of shearing of the solenoid cover bolts sometimes causing major engine damage when oil the oil being emptied, but no issues like that on the E46 vanos that we have come across.

A Vanos diagnostic will high light any issues: being solenold as well as pressure related.
 

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The thudding can also be a clutch thats on its way out. A friend of the family who works at Sytner Coventry, maintains our demo 328i and aunts M3. He's done the clutch on the demo 328i. This caused a slight thud noise when the car was stationary and engaginf 1st gear and also when selecting some gears from time to time whilst on the move. Its down to the plates (clutch plates?) continuing to spin during gear selections when the lutch is depressed rather than disengaging ......
 

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The thudding can also be a clutch thats on its way out. A friend of the family who works at Sytner Coventry, maintains our demo 328i and aunts M3. He's done the clutch on the demo 328i. This caused a slight thud noise when the car was stationary and engaginf 1st gear and also when selecting some gears from time to time whilst on the move. Its down to the plates (clutch plates?) continuing to spin during gear selections when the lutch is depressed rather than disengaging ......


Yes, I agree could also be that aswell.
 
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