Question about 2005 Mini Cooper

1 Answer

Oversised cranckshaft pulley

I replaced my original cranckshaft pulley with a solid and oversised one 4%(without rubber coupling).Need to know if affection results for the engine.

Posted by on

  • 1 more comment 
  • mecano666 Oct 17, 2008

    i do beleive that the oversised cranckshaft pulley increase the rotation of all attached devices pullies

  • mecano666 Oct 18, 2008

    At least you have the intention for posting solutions regardless if you'r right or wrong.

    Thanks anyway

  • mecano666 Oct 18, 2008

    your reply was highly appreciated.Need to hear your opignon if i'll tell you that this pulley is lighter by 4.5 klg then the original one(sorry for missing mentionning that) specially that my purpose was to let the superchager spin faster at early RPM. Now as i mentioned it befor, this pulley came solid without inner rubber coupling (to reduce vibrations) and i'm worriying if this can damage the crancksaft bearing or any other parts inside the engine

    sorry for miss understanding your point, and hope that your advices can help me making a correct decision,specially that the original pulley is a consumable part and has to be replaced around every 30 000 km with around 400 usd, and the aftermaket one is lifetime guaranteed.


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has achieved Level 3.

  • Master
  • 426 Answers

All parts tied to that pulley would rotate slower .dont know if 4% would have any undue affect on water pump flow or alternator outputs.I dont believe so but keep an eye on temp as it may circulate a little slowerr so it stands to reason it may run warmer.Alternators put out a predetermined amount of power dependant on the speed they are spinning .doubt it would be unduly affected

Posted on Oct 17, 2008

  • 1 more comment 
  • tony yeatman
    tony yeatman Oct 17, 2008

    Do your homework before making a comment only a head would make

  • tony yeatman
    tony yeatman Oct 18, 2008

    I have all and every intention of giving good advice but not when you rate the way you do you have by changing the pulley size increased the total area/size of movement In other words therse more lenght.Am i making sense?.You effectivly change what happens at a specific rev range,The bigger the pulley the slower you rev The smaller the pulley the faster you rev at your specific rev range.These days its all worked out so that things spin at specific times for specific reasons.

  • tony yeatman
    tony yeatman Oct 18, 2008

    Thanx for your reply its agood thing we are friends LoL!its all good Anyway back to the matter at hand.You will of course have to get the complete rotating assembly balanced because if you have no dampening that engine will let go impressivly.Im not sure why you would risk an engine by changing all the pulley ranges when getting a higher boost out of the super charger or changing the super charger pulley would have been an easier option.Maybe go see the supercharger wizzes to see how to make the charger perform better dont know myself .Anyway good luck and hope you come out on top.


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Why does the belt on my van keep coming off or breaking/stripping off?

Check the harmonic balancer. That is the the pulley that is attached to the crankshaft. The outer ring of the pulley, where the belt rides, is pressed onto the hub of the pulley and isolated from it by a rubber bushing that separates the outer ring (belt pulley) from the inner part that is attached to the crankshaft. The rubber will dry out and shrink as it ages and the outer ring will slide in or out (front or back), causing belt misalignment. This can cause stripping and jumping off as it doesn't provide the proper path for the belt. The new balancer is fairly easy to install, and they only cost about $60.00 USD. You need a harmonic balancer puller to remove it, but most auto parts stores will provide a loaner for the DIYer. Here is a picture of the one that goes on your Montana.....


May 25, 2016 | 2003 Pontiac Montana

1 Answer

Why is the crank pulley dampered?

No, you do not want to replace the crank pulley with a solid one. The hub is also know as a Harmonic Balancer. The explosions that happen inside of your engine cause vibrations or harmonics, the balancer greatly reduces these vibrations. Without the ruber insulating ring the harmonics can cause part failure at certain frequencies.

May 28, 2015 | 2006 Mahindra Scorpio 2.6

1 Answer

Where I the oil pump on a 1997 dodge intepid 3.3l

it is on the back side of the timing cover driven by the cranckshaft, the repair kit is about $50 , it takes a good solid 4 hr to replace, must remove the radiator and front cross member on top of radiator and headlights.

Apr 07, 2012 | 1997 Dodge Intrepid

2 Answers

How to remove pully from cranckshaft on a 1997 Nissan maxima?

I am not familiar with a Nissan, but most pulleys are pressed on the crankshaft. You have to use a puller to get them off. AutoZone rents tools for this, basically you leave a deposit and get your deposit back when you take the tool back. Please rate my answer so I am rewarded points for it.

Jan 28, 2012 | 1997 Nissan Maxima

2 Answers

Discernable wobble/ vibration at crankshaft pulley? I can see small pieces of rubber like material sticking out, and it starts to smoke/smell as well as vibrate. Is this the correct name for this part? And...

Harmonic balancer, Yes, but the original may need to be removed with a puller, after the belt is removed. The rubber is an insulator between layers, and may be failing.

Jul 06, 2011 | 2002 Nissan Sentra

1 Answer

I have a 99 pontiac grand am the belt seems to have melted off, does anyone know what would cause that to happen?

It sounds like one of your accessory drive pulleys has seized up. Check every pulley by hand except for the bottom (crankshaft) pulley. With the belt off, attempt to turn each pulley in the clock wise direction. Next, carefully examine the belt tensioner pulley. Look for signs of burning rubber on any of the pulleys. If you run across a pulley that you cannot turn by hand that appears to be frozen solid. (except for crankshaft pulley), then that accessory might be seized. The AC pulley is a good place to start. The belt tensioner pulley is another problem area to check. If you cannot locate the problem by using this method then post a comment to let me know and I can tell you how to check for that problem using a replacement belt and a timing light. I hope that this information will be helpful to you.Thank you for using

Jun 01, 2011 | 1999 Pontiac Grand Prix

1 Answer

Where are the timing marks on a 2004 ford ranger 2.5td

bottom pulley has a pointer and there is a grove in pulley your diesel pump is joint with chain appox ten oclock cranckshaft twelve

Mar 19, 2010 | 2004 Ford Ranger

1 Answer

Holding the timing gear from moving when replacing harmonic balan

Trust me, you DO NOT want to replace your balancer with a solid piece. The rubber in the original serves to dampen firing pulses and crankshaft twist. With a solid balancer the engine will shake itself to pieces even if you don't feel it. DON"T DO IT!!! I know a lot of Mitsubishi forums and resellers push the solid balancers, but they are dead wrong. The rubber isolated balancers are made that way FOR A REASON! If you insist on continuing, yes, the engine will spin when you tighten the bolt if you use a wrench, but should not affect timing if the belt is installed properly. Best way to tighten the nut is with an air impact gun. If it's a manual trans car, put it in gear and have someone stand on the brakes HARD while you tighten the nut. If the belt is off the car, and the balancer moves, you will have to realign ALL the timing makes, a VERY difficult job on a 3.0 Mitsu. I know, I own one!!! An alternative way to lock the engine from turning is to insert a bolt and nut between the cam gears. I can't remember what size I used, so it may take a bit of trial and error. A couple pieces of duct tape on the bolt will keep it from gouging the cam gears.

Apr 17, 2009 | 1996 Mitsubishi 3000GT

1 Answer

1990 Oldsmobile Cierra camshaft pully

do you mean crankshaft pulley? i dont know of a cam pulley on these.

if so replace the whole thing. the rubber on these go bad and rip away from the pulley. it happens. Just get a new one. should be a press fit one. may need a pulley puller. not the JAW type, but the 3 bolt type.
goold luck

ASE certified
plz rate

Feb 09, 2009 | 1990 Oldsmobile Cutlass Ciera

Not finding what you are looking for?
2005 Mini Cooper Logo

45 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mini Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22059 Answers


Level 3 Expert

71162 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6992 Answers

Are you a Mini Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides