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Author
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Topic: Assembling engine - won't turn over
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z pyro
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Member # 3745
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posted
 
 
I just got my block, rods, pistons and crank back from the shop today, got the crank turned 10 over and the bores 30 over. I put the first 4 pistons in, crank rotated just fine. I put the 5th one in (first on the driver side), and the crank gets really really hard to turn. Now that I have 7 in, it won't turn at all. Is it supposed to be this difficult to turn over? I have a breaker bar on the crank bolt, and it still won't budge and I'm afraid the bolt will break or something.
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'95 Integra LS
'08 Buell XB12R Firebolt
'65 Mustang 289 - soon to be 306
Posts: 1732 | From: Fresno, CA | Registered: Nov 2003
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MustangNate
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Member # 4559
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posted
I'm going to have to say no, it should not be that hard. Now keep in mind I'm not an engine builder or anything, but I have never encountered a motor where I couldn't even turn it with a breaker bar.
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1989 Mustang LX Vert, 5.0 Auto
Posts: 1032 | From: Chico | Registered: May 2004
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turbo50
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Member # 6700
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posted
Disassemble it back to the piston you put in that made it difficult to turn over. If it takes more than about 16lbs/ft to turn over with fresh rings in the shortblock then something is definitely wrong.
Verify you have all the same bearing sizes. Did you have the rods checked at the machine shop?
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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threethirty1
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Member # 7814
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posted
make sure your main caps are all the right way!Did u get a line hone?
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1987 Black GT
factory zero option car
Posts: 777 | From: North Bay | Registered: Jul 2007
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z pyro
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Member # 3745
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posted
turns out I put the snaps rings that were included with the pistons on, and that was causing the problem. I removed them and it rotates now
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'95 Integra LS
'08 Buell XB12R Firebolt
'65 Mustang 289 - soon to be 306
Posts: 1732 | From: Fresno, CA | Registered: Nov 2003
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kingmoochr
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Member # 5834
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posted
what? that makes no sense. did you have the rods installed backwards on the other side? or both? ford tangs point towards the cam, not towards the pan rail.
edit: unless you have pressed on pins, then it makes sense
[ June 01, 2008, 02:17 PM: Message edited by: kingmoochr ]
Posts: 880 | Registered: Jul 2005
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