460 fresh motor won't turn over

Its funny I got a 460 bored out eveythings new but I don't understand whats goin on its out of the truck and you can't turn it when the harmonic balancer goes on and we thought maybe it had strain from the rockers loosend them up and didn't solve anything I don't know if it would be something with the timming chain or what it might be? Cause we could turn it no problem before we put the heads on and the cam turns free and so does the crank I just don't understand what might be binding?

Time to remove it and take the heads off and see what is binding....


Randy

I would pull timing cover and look for something there and I'd pull the pan and check oil pump internals and even attempt to spin it over by hand with pan off.


If pistons are hitting the heads its back to the machine shop...

Well whats funny is I have the Timing cover case off and all as it is, is the chain and spacer and harmonic balancer if you take the harmonic balancer off and put the bolt back in you can spin the motor freely everything turns over fine soon as the harmonic balancer goes back on the tighter the bolt gets the tighter you can't turn the motor over.

Sounds like its hitting the cover and keeping it from spinning.

bb429power wrote:Sounds like its hitting the cover and keeping it from spinning.

thats the thing we did it with the cover off and its the same thing on or off I just don't get it

You do have the spacer on the crank between the timing gear, and the harmonic balancer, and the timing gear isn't on backwards - right ??

Wayne (SAWDOFF) Pearce

edit*

never mind just read your fighting the balancer...

Wayne Pearce wrote:You do have the spacer on the crank between the timing gear, and the harmonic balancer, and the timing gear isn't on backwards - right ??

Wayne (SAWDOFF) Pearce

X2

smoken460ce wrote:

bb429power wrote:Sounds like its hitting the cover and keeping it from spinning.

thats the thing we did it with the cover off and its the same thing on or off I just don't get it

Is it a double row timing chain and the chain is only on half, (one row), of the timing gear...?

Something is eating up the thrust clearance... Find it and you'll be fine.

The spacer is on right eveythings right timing chain is defantly on right I just don't get it the only thing that I didn't check is if the main bearing closed to the front of the crank is binding some how but nothing makes sence I was hopeing some one might of had this happen before I talked to a bunch of engine builders in my area and no one ever had this happen.

WHO's timing chain? what brand?



Randy

cam retainer on?
i doubt it'd bind that bad but.........

the Coug wrote:WHO's timing chain? what brand?



Randy

x2

a part # would help these guys help you...

at this point i would pull the chain off the sprockets and put the balancer back on and still see if it binds... I have two chain sets sitting here and one is standard, and one is for a cut crank... I assume the second link is for a crank thats cut .020 and the set-up is shorter. just throwing some info out.


http://www.summitracing.com/parts/CLO-9-3122/

http://www.summitracing.com/parts/CLO-9-3122-10/

something is binding and I was thinking I have seen one chain that they made the lower gear wrong and it would bind .

also are you sure the spacer is on right? the seal surface goes into the seal right?


It makes no sense how it could be binding without the timing cover on and just bolt the dampner on and tighten it down, the Dampner just holds the lower sprocket back against the crank.....


When you have the Dampner off and turn the engine over will it go a full rotation? with heads on and valves adjusted?


Randy

on a side note:

why are there dif. sets of chains like I listed... is it for a ground crank or mains? or what?

138 wrote:on a side note:

why are there dif. sets of chains like I listed... is it for a ground crank or mains? or what?

CLO-9-3122 is for STD block no altered mains

CLO-9-3122-10 is for a block that has had the main caps cut and lone honed which closes up the distance between the main bearing saddle and the cam bore....


Randy

The only way tighting the bolt on the balancer would cause this, is if the timming sprocket is rubbing the block. If he has the cover off it should be quite clear to see.

Or if the chain slipped off the back side of the sprocket...

I've done that one before...

It doesn't sound like the problem here but a couple of similar issues I have run into years back were:

1. using a regular bolt on the cam thrust plate. A regular bolt has a taller head and the camshaft sprocket hits it causing interference.

2. using a waterpump bolt too long in the wrong hole and it goes through the timing cover and bottoms out against the timing chain.

Too be honest it has been many years and I can't remember if it was on my BBF or my SBF but non the less I figured I would post it in case it helps someone else out.

the Coug wrote:

138 wrote:on a side note:

why are there dif. sets of chains like I listed... is it for a ground crank or mains? or what?

CLO-9-3122 is for STD block no altered mains

CLO-9-3122-10 is for a block that has had the main caps cut and lone honed which closes up the distance between the main bearing saddle and the cam bore....


Randy

thanks

Is the timing chain on ALL the way or is the pin holding it up or something.

Has this topic been resolved yet? I'm curious to know what the culprit was - if it's been found yet!

Wayne (SAWDOFF) Pearce

X2