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Engine will not turn with socket/wrench on crank CW

Posted By Lawrence Petty Last Month
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Lawrence Petty
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Rebuilt engine and engine turned over fine with socket.  Replaced cam with Isky 30144 and all went well.  Now the engine will not turn over by hand.  Took off tranny, clutch, flywheel, plugs and clothes pinned each valve push rod up with clothes pin.  Still not turn. Could it be something to do with the tappets & cam - as everything went in fine when installing.  Don't want to take engine our and tear it down, hopefully something simple I'm missing
Cliff
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3 things to check, first did you time it right?,2nd did you check the end play of the camshaft after install? 3rd did the cam turn free before you installed the timing chain?
Lawrence Petty
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The timing marks were positioned as stated in the books.  Never did check end play (what is the end play suppose to be) or turn it over before the timing chain was installed.  Wasn't familiar with Y-blocks & since it was a fresh rebuild thought things would be OK.  Anyway to determine tappet positions or anything else with the engine in the frame.  Or just take it out and take it apart.
charliemccraney
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Which books?  The book by James Eichman has the timing pictured incorrectly so if by that book, it's probably incorrect.  I don't think that could cause a problem with flat top pistons, as far as turning the engine, with the Isky 301444 since the lift is .425".

Pull the distributor to make sure it's not locking the cam for some reason.  If not, then I'm thinking that you reassembled the washers and spacers in front of the cam in the wrong order and it no longer has end play.  Here is a recent thread about that.  http://forums.y-blocksforever.com/Topic145717.aspx


Lawrenceville, GA
Cliff
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You can remove the timing cover in the car, with the timing cover off loosen the bolt in the center of the cam gear, see if the engine will turn over, if so the end play is wrong, there are some books that show you a picture of the timing marks with the chain installed however many are wrong, use a Motors manual or a Ford shop manual.
KULTULZ
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oldcarmark
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Lawrence Petty (7/27/2019)
The timing marks were positioned as stated in the books.  Never did check end play (what is the end play suppose to be) or turn it over before the timing chain was installed.  Wasn't familiar with Y-blocks & since it was a fresh rebuild thought things would be OK.  Anyway to determine tappet positions or anything else with the engine in the frame.  Or just take it out and take it apart.

Before You closed up the Timing Cover it would have been a good Idea to turn it over manually and make sure everything was turning without binding. Sounds like there is a problem with Cam Thrust Plate Assembly. There is a Min/Max Spec for Camshaft End play.

http://forums.y-blocksforever.com/uploads/images/b9ec8c4e-313b-486f-b1b0-422e.jpg http://forums.y-blocksforever.com/Uploads/Images/a82cee8f-be33-4d66-b65d-fcd8.jpg  
Ted
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You don’t mention what timing chain set you are using.  If using the Rollmaster set with the nine key crankshaft gear, counting the twelve pins between the marks can get tricky.  Regardless of the timing set being used, the twelve pins between marks are counted on the oil filter side of the engine.  If it is a cam timing issue, removing the rocker arms may allow the engine to turn over again but the Isky E4 cam is typically not a problem with valve to piston clearance.  I'm with the others in that the cam to gear spacers may have been installed in the wrong order thus putting the camshaft in a bind with the cam thrust plate.


Lorena, Texas (South of Waco)


stuey
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I had the same problem. New build in a 56 F100.  New aftermarket dampener. I had the wrong front engine mount and the dampener was binding on the mount.
Took 3 weeks to spot.
stuey  
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My guess is that the spacer was not transferred from the old cam to the hew one.  That's the one you put on the cam before the key is installed.  That traps the thrust plate between the front of the cam journal and the timing sprocket, locks it up tight.

John - "The Hoosier Hurricane"
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