How do i take the flywheel off?

[nshalaby]

I have a 650sx and im trying to take the flywheel off. Right now I have the jug off and am down to the crank case and have the flywheel cover off. i took the bolt right in the middle of the flywheel but that wont let it loose. Can someone please help me out? thanks

Also, i just got an engine sent to me from ebay and i took off the head i noticed that the rear piston had a 2mm or so gauge taken out of it. How much will this effect my performance just to ride it to the end of the year? thanks again

 

[showmepro1200]

Take bolt out (I think you said you have already), install gear puller (dont overscrew the bolts into the flywheel too far or youll hurt the stator), tighten it up real good and tight. If it doesn't pop at that point give it a sharp rap on the center of the puller with a hammer and it will likely pop loose.

Gear puller can be rented for free at autoparts store.

 

[steveyz250fpilot]

A sleestack in a suit....shiat, I've seen it all now. I'm getting Will and Holly and getting the hell outta here!

Take bolt out (I think you said you have already), install gear puller (dont overscrew the bolts into the flywheel too far or youll hurt the stator), tighten it up real good and tight. If it doesn't pop at that point give it a sharp rap on the center of the puller with a hammer and it will likely pop loose.

Gear puller can be rented for free at autoparts store.

 

[Mouthfulloflake]

the kaw 750 flywheels I messed with used a larger bolt in the center of the flywheel to PUSH it off.

is it threaded on the inside once you remove the nut in the center?

 

[showmepro1200]

the kaw 750 flywheels I messed with used a larger bolt in the center of the flywheel to PUSH it off.

is it threaded on the inside once you remove the nut in the center?

My 90 650sx had a bolt in the center, sure it was threaded.

Sleestaks- my younger years of saturday morning toons - I bet ol Land of the Lost would seem pretty comical to watch again.

 

[ADDict]

The threads that are in the center of your 650, where you removed the bolt, are actually threads in the crank itself. He was referring to the 750's, which ALSO have threads on the inside of the flywheel. You just thread a large bolt into the flywheel, and it pushes the flywheel away from the drive shaft, removing it.
Your 650 flywheel can ONLY be pulled by using a flywheel puller. I have used harmonic balancer pullers before, I just had to find the proper bolts to thread into my flywheel as the kit I had didn't have any that fit.
Some people say you can just put your fingertips behind the flywheel and put your feet on the cases and go to town prying. I've heard people swear they got theirs off this way, I've just never been able to do it. Then again I tried for .02 seconds and said hell with that!

 

[Lakeman]

Most auto parts stores will loan you a puller. You can also buy one. I bought mine at Sears for around $20. You will need 3 metric bolts. I don't know what size. I have a large collection of bolts so I don't worry about it. If you need bolts and want to wait for me to mail some let me know. You can either buy them or send them back when done. I also use a air impact gun to remove the flywheel. using the gun will pop it off real fast.
Dale

 

[nshalaby]

So i basically put another bolt inside that hole in the center of the flywheel using that flywheel puller tighten it up and that will just pull the flywheel off? And you guys said like a car quest will have a flywheel puller then usually lend out? thanks for all the help.

 

[Mouthfulloflake]

Oh sorry, I didnt realize the 650 wheels where different than the 750s in that way.

goto a auto parts store, and ask for a crows foot puller...

like this:

http://images.google.com/imgres?img...es?q=harmonic+balancer+puller&um=1&hl=en&sa=N

 

[nshalaby]

then i just put that end into the hold and tighten right? I checked with autozone the only thing that they said they had was a harmonic balance, would that work well too?

 

[showmepro1200]

then i just put that end into the hold and tighten right? I checked with autozone the only thing that they said they had was a harmonic balance, would that work well too?

Its hard to tell someone how to do it, in spite of it being very simple. You DO NOT just put one bolt in and screw it down though on the 650 - that was something for the 750.

Try and see if you can search the web for instructions on how to use the harmonic balancer puller - again, its very very simple to use but (IMO) tough to tell you how to do it. Unless someone wants to try.

Once you get the tool set up right, using 4 bolts (the one big in the center and the proper size three outlying ones), then you screw in the middle bolt to the point of popping the flywheel off. If the flywheel doesnt't pop and you feel like you've screwed it in as hard as you can (within reason), then take a hammer and give the middle (main) bolt a sharp hit with the hammer and that will usually break the flywheel free from the bit of rust and the tightness of the tapered end of the crankshaft and it all falls loose.

Look at the pic in Mouth's last post - set the tool up like this with the middle bolt (pointed end) into the end of the crank. Find the three smaller bolts that fit the holes in the flywheel and put them (in an even spacing) through those slotted ends in the tool and into the holes in the flywheel. AGAIN dont screw them in a major amount, you got a stator behind there - only about a half inch will do, you want good hold on the flywheel threads. Once the flywheel bolts are in both the tool and the flywheel, then start screwing the middle bolt - things eventually will all tighten up, keep the tool (middle bolt) straight with the crank. Like I said above, once you get it really tight and if it hasn't popped off by this time, then use the hammer and that shock from the hammer blow will make it pop loose.

Sorry for going round in circles here - not enough coffee in my system yet to be coherent.

 

[Mouthfulloflake]

this pic shows how it works.
EDIT- pic only shows using 2 smaller bolts, you will be using all 3 like showmepro56900 said.

http://home.hiwaay.net/~langford/corvair/00112560.jpg

thread the smaller bolts into the threaded holes of the flywheel ( not too far thru though they can damage the windings)

then tighten the large bolt to the center of the crank ( where you removed the flywheel bolt)
sometimes the TIP of the tool has a pivot that thing that you might have to remove if it presses against the FLYWHEEL instead of the crank.

you will see.

this pic shows one in action.

get it tight,
lay some rags on the floor in front of the engine ( the flywheel will dam nearly shoot off)

tap the center with a hammer
tighten
tap
tighten
tap.

it will pop and scare the crap out of you.

 

[hangtime]

A picture is worth 1000 words ,nice work Lake

 

[tor*p*do]

Also, i just got an engine sent to me from ebay and i took off the head i noticed that the rear piston had a 2mm or so gauge taken out of it. How much will this effect my performance just to ride it to the end of the year? thanks again

post a pic of the fleabay motor
cant tell much by this description, but it does not sound good!

 

[WFO Speedracer]

Ok there is one thing missing here .On a 650 Kawi the center puller bolt will never touch the crankshaft,it will touch the flywheel and it will never come off.On the 650's you have to install another bolt into the crankshaft,I reccomend finding a smaller bolt that will both fit inside the crank bolt threads and inside the hole in the center of the flywheel,grind the edges of the bolt head if you have to to make it fit inside the flywheel,then you run the center bolt on the puller up against the bolt you just installed and use it like Flake told you to.You may also use a nut in there instead of a bolt just make sure it is small enough and contacts the crankshaft end and not the flywheel!

 

[madscientist]

WHAT ARE YOU TALKING ABOUT? my puller shaft on both of mine hit the crank shaft and press it off well.

once it is bound up nice and tight whack the end of the puller w/ a hammer it should pop right off, if not apply a little heat

 

[WFO Speedracer]

Ya'll must be using some cheap azz wimpy pullers then,my Snap on puller bolt won't even think about contacting the crankshaft without a nut or bolt in there,the center bolt is huge! Sorry I have no experience with cheap pullers carry on!

 

[slag]

I think what he's saying is, with the sharp tip on the autozone harmonic balancer puller, it will wedge against the flywheel and not against the crankshaft stub and yeah, will not pull the flywheel off. You need to get a puller with a removeable tip. Also, you don't want to screw it down to the end of the crankshaft because it will ruin your threads--been there, done that.

I screw the original bolt back into the crankshaft hole until its a couple milimeters away from the flywheel. Then, adjust your harmonic pulley puller so that you are pressing against the head of the bolt and not against the crankshaft. I, too, use an impact wrench set to around 100 ft lbs to tighten it all down and then whack it with a sledge hammer. It will pop right off after a bit. Then, unscrew the flywheel bolt and the assembly will come off. Be sure to grab the key as well.

 

[slag]

Ya'll must be using some cheap azz wimpy pullers then,my Snap on puller bolt won't even think about contacting the crankshaft without a nut or bolt in there,the center bolt is huge! Sorry I have no experience with cheap pullers carry on!

Who gives a ******** how much it costs. Wimpy or not, it does the job and works well. :woot:

 

[WFO Speedracer]

I think what he's saying is, with the sharp tip on the autozone harmonic balancer puller, it will wedge against the flywheel and not against the crankshaft stub and yeah, will not pull the flywheel off. You need to get a puller with a removeable tip. Also, you don't want to screw it down to the end of the crankshaft because it will ruin your threads--been there, done that.

I screw the original bolt back into the crankshaft hole until its a couple milimeters away from the flywheel. Then, adjust your harmonic pulley puller so that you are pressing against the head of the bolt and not against the crankshaft. I, too, use an impact wrench set to around 100 ft lbs to tighten it all down and then whack it with a sledge hammer. It will pop right off after a bit. Then, unscrew the flywheel bolt and the assembly will come off. Be sure to grab the key as well.

Bingo we have a winnahhhhhhhh! You have to be careful with that also as it can mess up the threads and or the flywheel bolt,been there don that as well,that is why after many years of pulling these flywheels I do it with an extra nut or bolt between the puller and crankshaft stub.