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» Northern California Ford Owners     » Automotive   » Tech Talk   » Assembling engine - won't turn over

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Author Topic: Assembling engine - won't turn over
z pyro
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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  |  :
MustangNate
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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  |  :
turbo50
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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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Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006  |  :
threethirty1
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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  |  :
street_illegal_stang
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did you gap the rings?rod caps mixed up [Confused]
Posts: 1276 | From: Long Beach C.A | Registered: Jul 2002  |  :
z pyro
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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  |  :
kingmoochr
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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: 881 | Registered: Jul 2005  |  :


 
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