New motor won't turn over

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New motor won't turn over

Post  sg86coupe on July 25th 2015, 2:56 pm

Tring to put converter bolts in but motor will only turn a small amount then stop. I can turn it backwards easly but only a small amount. Converter turns freely. This is my new motor, I don't want to think it could be a problem inside. Any ideals?

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Re: New motor won't turn over

Post  supervel45 on July 25th 2015, 3:07 pm

So did it turn over before you put it in?

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Re: New motor won't turn over

Post  sg86coupe on July 25th 2015, 3:15 pm

I didn't put it together, I paid a engine builder to assemble it. I don't remember trying to turn it over.

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Re: New motor won't turn over

Post  supervel45 on July 25th 2015, 3:28 pm

Are any of the accessory's on the front of the engine hooked up, ie waterpump, alternator,PS,A/C ect?

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Re: New motor won't turn over

Post  maverick on July 25th 2015, 5:27 pm

It 's pretty hard to assemble an engine if you can't turn it over. I'm guessing the flywheel bolts are a little too long.
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Re: New motor won't turn over

Post  69F100 on July 25th 2015, 5:58 pm

maverick wrote:It 's pretty hard to assemble an engine if you can't turn it over.  I'm guessing the flywheel bolts are a little too long.

X2 had that to happen on my 460 when I built it the first time
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Re: New motor won't turn over

Post  maverick on July 25th 2015, 6:58 pm

Update?
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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 3:17 pm

Well I pulled the transmission back out, took the fly wheel off and motor still won't turn over. I was hoping fly wheel bolts were hitting. Any ideals before I pull motor back out ?

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Re: New motor won't turn over

Post  maverick on July 26th 2015, 3:22 pm

Spark plugs are out?

What's the engine combo?
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Re: New motor won't turn over

Post  supervel45 on July 26th 2015, 4:02 pm

No really good ideas. If none of the front accessories are locked up, which is not likely, pull the fuel pump, distributor, and valve covers (for visual inspection) and see what happens. It's not sounding very good at this point, but don't give up hope.

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Re: New motor won't turn over

Post  69F100 on July 26th 2015, 5:13 pm

Make sure if it has adjustable rocker arms they are not to tight and making a valve hit the piston
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Re: New motor won't turn over

Post  460bronco on July 26th 2015, 5:20 pm

Hate to hear you are having problems.  Keep us posted
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Re: New motor won't turn over

Post  rmcomprandy on July 26th 2015, 5:30 pm

It could be something as simple as a spark plug ground electrode to something really serious

Almost impossible to diagnose without feeling it or seeing it.

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Re: New motor won't turn over

Post  maverick on July 26th 2015, 5:42 pm

How far will it turn from stop to stop?
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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 6:11 pm

The crank will only turn a very little bit mabey 1/8 turn. It turns easly the amount it turns. Randy I know it's hard to figger it out without being here, I guess I'm close to panicing so I appreciate any suggestions from everyone. This is my new motor A-head 572, it's in proven builds under A-head 547. Thanks again for any help.

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Re: New motor won't turn over

Post  supervel45 on July 26th 2015, 6:30 pm

OK, so it's a full race engine. What have you done besides pull the trans and flexplate?

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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 8:08 pm

Rockers are loose Valves have not been set. So I'm not sure what to check next.

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Re: New motor won't turn over

Post  68formalGT on July 26th 2015, 8:12 pm

I heard of the crank hitting a Kaase oil pump before.
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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 8:15 pm

This motor has a new Kasse oil pump.

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Re: New motor won't turn over

Post  supervel45 on July 26th 2015, 9:07 pm

sg86coupe wrote:Rockers are loose Valves have not been set. So I'm not sure what to check next.
                                                               So the engine builder did not set the valve lash? Just trying to piece together the puzzle. The Kasse oil pump hitting the crank makes a lot of sense if it was the last thing installed.

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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 9:58 pm

Valves were not set I picked up the motor in december and did not want pressure on valve springs over winter. I do not know the order of how it was assembled, so I don't know if the pump and pan were last.

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Re: New motor won't turn over

Post  rmcomprandy on July 26th 2015, 10:07 pm

sg86coupe wrote:Valves were not set I picked up the motor in december and did not want pressure on valve springs over winter.

To see if that was the screw-up ... take out all the pushrods and see if the issue goes away.

At least you might locate the area of the problem.

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Re: New motor won't turn over

Post  cool40 on July 26th 2015, 10:18 pm

maverick wrote:Spark plugs are out?

What's the engine combo?
^^^ if the rockers are off and the plugs are in you wont turn it much. Suspect
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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 10:27 pm

If it is the Kasse pump what is the fix, different brand pump or grinding the Kasse pump? I'll go pull the push rods and see if that helps.

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Re: New motor won't turn over

Post  68formalGT on July 26th 2015, 10:30 pm

If I remember correctly it was clearanced with a grinder. I don't remember where I saw it, may have been here or the old 385 websight but I remember pictures.
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