New motor won't turn over

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Re: New motor won't turn over

Post  cool40 on July 26th 2015, 10:31 pm

68formalGT wrote: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.
yes
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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 10:33 pm

Ok plugs are not in motor, just pulled push rods out and motor turns over. keep in mind push rods, rockers and poly locks were on motor but lash was not set.

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Re: New motor won't turn over

Post  68formalGT on July 26th 2015, 10:44 pm

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Re: New motor won't turn over

Post  cool40 on July 26th 2015, 10:48 pm

sg86coupe wrote:Ok plugs are not in motor, just pulled push rods out and motor turns over. keep in mind push rods, rockers and poly locks were on motor but lash was not set.
did your builder check piston to valve clearance?
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Re: New motor won't turn over

Post  bbf-falcon on July 26th 2015, 10:59 pm

Was he a engine builder, or just someone you paid to assemble the engine? Embarassed
And, if he had checked the valve train geometry, he should found the problem before you got it back.

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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 11:10 pm

He's a big name builder around here, Scott Duggans he has alot of fast stuff and alot of championships. I would think they checked clearences

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Re: New motor won't turn over

Post  gmsmkr on July 26th 2015, 11:16 pm

If you did all that at once put 1 plug in and see if it stops turning
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Re: New motor won't turn over

Post  sg86coupe on July 26th 2015, 11:25 pm

Good ideal but I don't have plugs yet, don't know what to get. Thats another question I need help with.

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Re: New motor won't turn over

Post  cool40 on July 26th 2015, 11:31 pm

Where did the pistons come from? Do you have enough spring for the cam?
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Re: New motor won't turn over

Post  gmsmkr on July 26th 2015, 11:34 pm

sg86coupe wrote:Good ideal but I don't have plugs yet, don't know what to get. Thats another question I need help with.

O I was under the impression you took the plugs out also... this is a tricky one without being there
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Re: New motor won't turn over

Post  the Coug on July 26th 2015, 11:35 pm

your saying the engine was professionally built and the rockers weren't set and the engine won't turn over? I would question the engine builders experience... If it won't turn over and valves are not set something is severly WRONG Makes me wonder about cam timing... I would take it back or start disassembly to find the problem cuz you have one thats for sure...
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Re: New motor won't turn over

Post  dtimmer on July 26th 2015, 11:39 pm

If none of the rockers were set, it would be very difficult to turn the engine over with the cam trying to push only a few springs. When they are all set they kind of balance out the force on the cam and allow then engine to roll over easier.

Set all the rockers and try again.

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Re: New motor won't turn over

Post  supervel45 on July 26th 2015, 11:46 pm

Something sounds off here. If all the rockers were loose, and the push rods were in the guide plates, how did it lock up the engine so it would only turn a "small amount" in either direction? Randy did nail the problem, if it turns over now. Anyway, hopefully that was the only problem, and you get it going.

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Re: New motor won't turn over

Post  dtimmer on July 26th 2015, 11:50 pm

Depends on how loose the rockers actually were and where they were on the lobes of the cam. I'm sure they were backed off only enough to get off the spring. Put a big enough bar on it she would have turned over

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Re: New motor won't turn over

Post  cool40 on July 26th 2015, 11:52 pm

It may be best to talk to your builder tomorrow. Wink
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Re: New motor won't turn over

Post  supervel45 on July 26th 2015, 11:58 pm

sg86coupe wrote: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.
Coug it sounds like he asked the engine builder to back off the rockers when he was done, because the engine was going to sit up awhile.

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Re: New motor won't turn over

Post  supervel45 on July 27th 2015, 12:13 am

cool40 wrote:Where did the pistons come from? Do you have enough spring for the cam?
http://www.429-460.com/t21137-a-head-547 I bet Lem and Oakley hooked him up with the right parts.

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Re: New motor won't turn over

Post  cool40 on July 27th 2015, 1:05 am

supervel45 wrote:
cool40 wrote:Where did the pistons come from? Do you have enough spring for the cam?
http://www.429-460.com/t21137-a-head-547          I bet Lem and Oakley hooked him up with the right parts.                                                                      
maybe......or not? Question thats why i asked about pistons. Cool
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Re: New motor won't turn over

Post  supervel45 on July 27th 2015, 3:05 am

^^^^^^^   You do have a point about the pistons. I was thinking more about the cam and springs. You also had a good idea about calling the builder to. Not knowing what spark plugs to use at this point is also interesting. With .846" lift minus whatever valve lash and 15/1 compression, he might want to ask what the piston to valve clearance numbers are intake and exhaust, and what the cam was degreed in at, and see if was recorded durning the build.

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Re: New motor won't turn over

Post  gt350hr on July 27th 2015, 1:00 pm

Scott Duggins is no dummy. He is one of the best in South Carolina.

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Re: New motor won't turn over

Post  J.Toney on July 27th 2015, 6:01 pm

dtimmer wrote:If none of the rockers were set, it would be very difficult to turn the engine over with the cam trying to push only a few springs. When they are all set they kind of balance out the force on the cam and allow then engine to roll over easier.

Set all the rockers and try again.
This is legit, been here before.
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Re: New motor won't turn over

Post  sg86coupe on July 27th 2015, 10:42 pm

I found something, putting push rods back in, all intakes first, motor will turn over, first exhaust I put in push rod then rocker arm and the rocker stud is touching the inside of the rocker arm slot at the front. Poly lock wont go on. I think the push rod is to short on the exhaust.

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Re: New motor won't turn over

Post  supervel45 on July 27th 2015, 10:49 pm

Did you call your builder yet? If not I think you should, especially since his name has been mentioned here.

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Re: New motor won't turn over

Post  sg86coupe on July 27th 2015, 11:11 pm

I haven't said anything bad about him,I'm trying to make sure I haven't done something wrong or over looked something. I am in no way trying to talk bad about anyone, just trying to make it make sense .

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Re: New motor won't turn over

Post  FalconEh on July 27th 2015, 11:27 pm

supervel45 wrote:Did you call your builder yet? If not I think you should, especially since his name has been mentioned here.

^^^^^ I agree let him guide you, he knows the build and if something is wrong he can verify and correct it.

sg86coupe wrote:I haven't said anything bad about him,I'm trying to make sure I haven't done something wrong or over looked something. I am in no way trying to talk bad about anyone, just trying to make it make sense .

Not that you bad talked anyone you have been cautious with your new build, and I am sure your engine builder will recognize that and help you move on.
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