Surfriding tbm flywheel doesnt fit keyway or crank taper?

masterblaster

masterblaster

X-H2
I got a brand new tbm flywheel,says 701 charging on the box ...when installing its REALLY tight on the key way and it doesnt seem to wana slide back it,even removing the keyway and putting the flywheel on it doesnt wana seat in all the way before it gets tight,I have a rad and stock fw that both work fine with this crank and keyway?

I went ahead and just used the ratchet to pull the fw in on the keyway,torqued it lightly,fw went all the way in and looked normal but now the motor feels kinda tight,I guess its pulling the crank up on the seal really hard? took it off and it didnt pop off with the puller like most do it just slowly pulled off? motor turns freely again,if this flywheel is machined wrong im going to be upset........any ideas?
 
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Matt_E

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
Contact TBM perhaps? Something obviously ain't right. Not sure why you went and torqued that thing down despite it not fitting right. I don't think I could do that to an expensive crank.
Perhaps the wrong taper was machined. I've never seen that problem before.
 
masterblaster

masterblaster

X-H2
Me either,it wasnt far off and I fig it was just new so it needed to be seated,tryed taking the key way out and just hand tightening it with a 3/8s ratchet it seems to seat ok but still pulls off to easy,not sure why that would happen with no keyway? I tried to call tbm first obviously but no one answered.Ill try them again after the weekend,just wondered if anyone else had a issue like this with one.
 
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RyanITV

RyanITV

Living on the lake!
Location
Lewes, DE
Mine was new, too and the key seemed too tight in the flywheel. I just torqued it to spec - it seemed tight, but turned over by hand. Ended up throwing the timing off, demolishing the flywheel and stator - I'm hoping the crank is ok; I didn't know any better - first flywheel I'd put in a 701.

Post up what TBM says... curious to know if it's a bad batch.

Ryan

stator.jpgflywheel.jpg
 
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masterblaster

masterblaster

X-H2
thats some bs right there to pay this kinda $ for a fw and get that kinda result,yea the keyway is only off by a couple thousandths but i think the taper is messed up far worse,If you started your motor like that im surprised it didnt shear the key,how tight did your motor feel by hand in comparison to the fw you removed?
Its hard to tell from your pic but where was the fw rubbing? I spun mine over by hand 5 ot 6 revolutions and dont see any contact areas?
 
RyanITV

RyanITV

Living on the lake!
Location
Lewes, DE
I didn't have any comparison for the motor engine. It's a brand new Xscream SS865 that Brian @ Thrust put together for my wife's build. I just had to install the flywheel, starter, bendix and cover... at least I was 3/4 successful... :censored:
 
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masterblaster

masterblaster

X-H2
not sure how it would rub the front cover if it was seated all the way,if thats the case bet he has had other probs with it since

ryan,why did you have to do those last few things if he did the rest the motor?,can you post a better pic of the back of the fw i cant really see the wear areas because of the glare
 
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RyanITV

RyanITV

Living on the lake!
Location
Lewes, DE
masterblaster said:
ryan,why did you have to do those last few things if he did the rest the motor?
Click to expand...

He didn't have the starter, bendix or cover - sourced them all individually. Originally, I was robbing parts from my 2006 for her build but ended up going new on it all so I can put the 2006 together and sell it.

Ryan
 
masterblaster

masterblaster

X-H2
ah that sucks,bet you wish you had just shipped him the last few parts,would have been his issue and he would have prolly been able to identify and solve it faster, unfortunately im my own builder.pretty sure tbm will make this right,ill let ya know what they say,did you ask Brian about it yet? he see this issue with any others he had in the past?

after looking at the pic a little further and putting it on a extra crank I had laying around,the taper seems to be fine,the issue with these is poor machining,the keyway is a few thousandths to small and the back side hub is a couple thousandths to big,it scrapes the inside coil around the outside edges of the hub enough to put a bind on the motor. just enough to do what happened above,screw up your stator,starter,bendix. tbm better get a handle on how ever many of these went out like this in this batch,they go on harder than usual,but they do go on and if you dont happen to check how easy the motor turns over by hand you would never know. im sure the the starter will still spin the motor plenty fast at this level of a bind,but screw everything up in the process.
 
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SUPERTUNE

SUPERTUNE

Race Gas Rules
Location
Clearwater Fl.
RyanITV said:
Mine was new, too and the key seemed too tight in the flywheel. I just torqued it to spec - it seemed tight, but turned over by hand. Ended up throwing the timing off, demolishing the flywheel and stator - I'm hoping the crank is ok; I didn't know any better - first flywheel I'd put in a 701.

Post up what TBM says... curious to know if it's a bad batch.

Ryan

View attachment 132537View attachment 132538
Click to expand...

Penken found his problem here!
Look at the pictures...what's wrong with this?

Ryan tried too hard in doing this right and ended up with the wrong year stator...61X stator with a 62T TBM flywheel!
 
masterblaster

masterblaster

X-H2
Why are the keyways too tight on both of ours,I cant even drive my keyway down the fw with a tool,I have a 62t stator,dont see any wear marks on the fw when i remove it,but it doesnt come off easy even once its moving back and forth freely a little,the keyway stays stuck in the end of fw and i have to use the puller to get it off even the last bit and the keyway is still stuck in it?

Good call on the x stator,i didnt notice that in his pic above
 
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Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
OK.......... When this part does (Clang Clang) fit, I should get a hammer (Bam Bam) or Ratchet (Click Click Click) and just tighten (Grrrrrrr Grrrrrr) this Mother Trucker (Pow)...............Uh, Uh Oh........... What was that popping sound........... Ummmmmm Yeah, it should be ok...........
Thought it was just a bit to tight.
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
"Ok, guys, I went in install this flywheel and it seemed like something was just a bit to tight............So, I forced that chit on and now it does not work, any ideas??"
 
RyanITV

RyanITV

Living on the lake!
Location
Lewes, DE
Big Kahuna said:
"Ok, guys, I went in install this flywheel and it seemed like something was just a bit to tight............So, I forced that chit on and now it does not work, any ideas??"
Click to expand...

In my own defense, I honestly didn't know any better. First flywheel I'd ever installed, I just figured they were all tight like that. No hammer used, just the torque wrench and when it went to 65lbs, the flywheel was flush.

Ryan
 
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ATS_Aaron

ATS_Aaron

X-
Location
Shady Shores, TX
I've had two TBM flywheels. First felt tight like that and cracked within a couple hours. They refused to warranty it too. They claimed no one else had ever had a problem. That's obvious BS at this point. It also trashed my 8mm stroker crank snout. Dumbass me spent another $500 on another one that also failed within hours. Stock and MSD work fine and TBM can suck me.
 
masterblaster

masterblaster

X-H2
dang Aron are you serious,they wouldnt warranty either one of them? did they both feel really tight sliding onto the keyway, you would think they would know if they are machining them to tight,thats the main thing that causes them to crack. I have 2 cranks and 2 keyways here and both of them are doing the same thing,one crank and key are brand new,so its no other issue than the fw.
Its not like it has to be hammered on,it just doesnt fall into place as far back as any other fw, then you have to pull it back the rest the way the key with the fw bolt,I dont think it allows it to sit proper on the crank taper at 65lbs torque,so i can see how they would crack or shear the key very easy.
Has anyone else noticed the tight keyway issue and been fine running them afterwards anyway?
 
masterblaster

masterblaster

X-H2
alright well then thats good to know,i just need to send this one back and get another,wonder how many jacked up tbm fw are out there in this batch?all my other fw slide on smooth also,jetinetics,rad and lightened stocker. but ive never had a brand new aftermarket to know what perfect tolerance should be.

also worth mentioning,the internal hub part of the tbm i have does not look like the one in the pic above with the machined out squares in it, the hub is completely smooth,so id assume mine weighs more also?
 
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