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Problem Turning Over A New Motor


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#1 RHDmini74

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Posted 06 June 2018 - 01:00 AM

So on my old motor I would jack up the front and spin the wheel with the car in gear and it would turn the motor over fine. On the new motor I did the same method but when i put the car in gear the wheel wasnt able to spin. no spark plugs in. Any help? thanks.



#2 nicklouse

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Posted 06 June 2018 - 01:20 AM

so what is happening? the other wheel moving? is it in gear?

 

i just put it in gear with both wheels on the ground and push it.



#3 RHDmini74

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Posted 06 June 2018 - 04:06 AM

so what is happening? the other wheel moving? is it in gear?

 

i just put it in gear with both wheels on the ground and push it.

Yea when the car is on the ground and in 4th gear the motor turns over when i push it, but when i jack it up and put it in any gear the wheel spins like the car is in neutral. I'm pretty sure I adjusted my valves that way last time unless I'm having a brain fart. 



#4 Moke Spider

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Posted 06 June 2018 - 05:42 AM

 

so what is happening? the other wheel moving? is it in gear?

 

i just put it in gear with both wheels on the ground and push it.

Yea when the car is on the ground and in 4th gear the motor turns over when i push it, but when i jack it up and put it in any gear the wheel spins like the car is in neutral. I'm pretty sure I adjusted my valves that way last time unless I'm having a brain fart. 

 

 

I think what Nick is saying is that If you have both front wheels in the air, then you'll have no chance of turning the motor over.

 

Try with only one wheel off the ground.



#5 RHDmini74

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Posted 06 June 2018 - 06:05 AM

 

 

so what is happening? the other wheel moving? is it in gear?

 

i just put it in gear with both wheels on the ground and push it.

Yea when the car is on the ground and in 4th gear the motor turns over when i push it, but when i jack it up and put it in any gear the wheel spins like the car is in neutral. I'm pretty sure I adjusted my valves that way last time unless I'm having a brain fart. 

 

 

I think what Nick is saying is that If you have both front wheels in the air, then you'll have no chance of turning the motor over.

 

Try with only one wheel off the ground.

 

I tried that too. i wasn't able to turn it. I'm guessing it might be because the motor is real high comp and it would've took a lot of muscle lol



#6 RHDmini74

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Posted 06 June 2018 - 06:10 AM

Here’s a pic of the motor. What clearance should I set by the way?

Attached Files



#7 Steve220

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Posted 06 June 2018 - 06:14 AM

Is it a full fresh rebuild? Including bearings and pistons?

#8 RHDmini74

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Posted 06 June 2018 - 06:16 AM

Is it a full fresh rebuild? Including bearings and pistons?

I re used the pistons and valve train. everything else is new. Its an old race motor that was sitting for years before i tore it down and rebuilt it. I've had it for a while now so I want to see how it runs before i rebuild another motor I have.



#9 whistler

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Posted 06 June 2018 - 09:17 AM

Is it a full fresh rebuild? Including bearings and pistons?

I re used the pistons and valve train. everything else is new. Its an old race motor that was sitting for years before i tore it down and rebuilt it. I've had it for a while now so I want to see how it runs before i rebuild another motor I have.

Try it in 4th gear. If the plugs are out then it doesn't matter about high or low compression.

#10 nicklouse

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Posted 06 June 2018 - 09:26 AM

 

 

 

so what is happening? the other wheel moving? is it in gear?

 

i just put it in gear with both wheels on the ground and push it.

Yea when the car is on the ground and in 4th gear the motor turns over when i push it, but when i jack it up and put it in any gear the wheel spins like the car is in neutral. I'm pretty sure I adjusted my valves that way last time unless I'm having a brain fart. 

 

 

I think what Nick is saying is that If you have both front wheels in the air, then you'll have no chance of turning the motor over.

 

Try with only one wheel off the ground.

 

I tried that too. i wasn't able to turn it. I'm guessing it might be because the motor is real high comp and it would've took a lot of muscle lol

 

to turn the engine by one wheel you MUST have it in gear and have the other wheel immobile (on the ground or locked off) or as you have said have both on the ground and in gear and move the whole car.



#11 nicklouse

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Posted 06 June 2018 - 09:27 AM

Here’s a pic of the motor. What clearance should I set by the way?

what ever is speced by the cam maker.



#12 Moke Spider

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Posted 06 June 2018 - 09:38 AM

< I've edited the Title of the thread to better reflect the issue >



#13 RHDmini74

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Posted 06 June 2018 - 10:06 AM

Thanks guys. Ill adjust it while rolling it on the floor. hopefully start it up soon



#14 Steve220

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Posted 06 June 2018 - 10:16 AM


Is it a full fresh rebuild? Including bearings and pistons?

I re used the pistons and valve train. everything else is new. Its an old race motor that was sitting for years before i tore it down and rebuilt it. I've had it for a while now so I want to see how it runs before i rebuild another motor I have.

It'll be tight from not being run in too. Mine is stiff but will turn over once it's been rocked back and forth in 4th gear.

#15 InnoCooperExport

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Posted 06 June 2018 - 01:31 PM

Can you get it to turn over with a big spanner on the crankbolt on the pulley, with the box in neutral and plugs out. If it won´t turn then, then you´ve got a problem. 

 

As Whistler said, with the plugs out you won´t have any compression so then it doesn´t matter if your engine is high or low compression as there is no compression at all then. 






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