HELP, stroker crank not spinning freely when torqued
#734184
06/26/10 07:44 PM
06/26/10 07:44 PM
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Joined: Apr 2007
Posts: 807 Toronto, Canada
dirtybee
OP
super stock
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OP
super stock
Joined: Apr 2007
Posts: 807
Toronto, Canada
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i need some ideas 'cause i'm really bummed ![](/ubbthreads/images/graemlins/frown.gif) i bought a 500" stroker kit for a low deck last year, a 400" motor about 3-4 years ago and finally had funds for machining this year. i did everything, line hone and install studs, pin fitting, balance, bore/ hone, zero deck, cc'd one chamber to figure cr, performance valve job, blah blah. so i spent money i don't have so it would be done right and even paid $100 for a "trial assembly" but wanted to do my own assembly. the main bearings needed to be clearanced for the radiused fillets according to the machinist and this was done. so, i have tried 3 times torquing the main studs with lube on the bearings torqing to 30, 60, then 90 then setting #3 and it tightens right up to where i can't turn by hand. i have checked for runout with a dial indicator, the bearing clearance was checked at .024. any ideas? this is my first real build, machine shop is reputable yet have not called me back, the bearing faces look fine and i can spin the crank with a ratchet. i don't know if this is normal but don't think so. shouldn't the crank spin as easy as when the caps are off? sorry so long but i don't know what to do and i've spent a lot of money, thanks
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Re: HELP, stroker crank not spinning freely when torqued
[Re: dirtybee]
#734185
06/26/10 07:54 PM
06/26/10 07:54 PM
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Joined: Feb 2006
Posts: 1,051 The Great White North
RAMM
super stock
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super stock
Joined: Feb 2006
Posts: 1,051
The Great White North
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Breakaway torque can sometimes fool you. If it spins REALLY nice with a ratchet once you get it going then I would say your fine--However, Why don't you check the clearances and know for sure? J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: HELP, stroker crank not spinning freely when torque
[Re: Quicktree]
#734197
06/26/10 10:02 PM
06/26/10 10:02 PM
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Joined: Apr 2007
Posts: 807 Toronto, Canada
dirtybee
OP
super stock
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OP
super stock
Joined: Apr 2007
Posts: 807
Toronto, Canada
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Quote:
yea send it back to the chinese
thanks, that helps
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Re: HELP, stroker crank not spinning freely when torque
[Re: Baxter61]
#734198
06/26/10 10:05 PM
06/26/10 10:05 PM
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Joined: Apr 2007
Posts: 807 Toronto, Canada
dirtybee
OP
super stock
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OP
super stock
Joined: Apr 2007
Posts: 807
Toronto, Canada
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Quote:
maybe the cranks bent
that was my first thought so i checked runout and it's perfect. needle doesn't budge.
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Re: HELP, stroker crank not spinning freely when torqued
[Re: dirtybee]
#734201
06/26/10 11:09 PM
06/26/10 11:09 PM
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Joined: Nov 2004
Posts: 3,544 Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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Do this. Just install #2 & #4 only, and see what happens. Then if ok add #1, check it, then # 5 and check it. See what happens there first. Do not install #3 up to this point.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: HELP, stroker crank not spinning freely when torque
[Re: CompWedgeEngines]
#734202
06/26/10 11:59 PM
06/26/10 11:59 PM
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Joined: Apr 2007
Posts: 807 Toronto, Canada
dirtybee
OP
super stock
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OP
super stock
Joined: Apr 2007
Posts: 807
Toronto, Canada
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Quote:
Do this. Just install #2 & #4 only, and see what happens. Then if ok add #1, check it, then # 5 and check it. See what happens there first. Do not install #3 up to this point.
thank you, i did try that, i loosened all the studs, then tried #2 & #4 and it bound after like 30 or 45 ft/lb, the other caps were on but un-torqued. do the others need to be removed or is this ok?
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Re: HELP, stroker crank not spinning freely when torque
[Re: Shaker223]
#734203
06/27/10 12:07 AM
06/27/10 12:07 AM
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Joined: Apr 2007
Posts: 807 Toronto, Canada
dirtybee
OP
super stock
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OP
super stock
Joined: Apr 2007
Posts: 807
Toronto, Canada
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Quote:
It sounds like you are using studs. I had a like issue where a Stud was touching a cap internally and when torqued, my end play would go away. I put a stock bolt in and all was fine. I had to have the cap opened up .030" and the stud worked fine.
i also thought of this and may look into opening up the bolt holes in the caps but i don't lose the endplay of 5 or 6 thou when the crank binds????? ![](/ubbthreads/images/graemlins/shruggy.gif)
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