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Slow Turning Starter Motor - Seized Engine?


Best Answer neal , 15 October 2016 - 03:42 PM

Have you tried turning the engine over by hand using a spanner/socket & ratchet, you might be able to feel if there are any tight spots.

 

Might be worth squirting a bit of WD40 or engine oil down the spark holes after you have turned it over, then turn it over again by hand to see if there is any difference. This could highlight any bore issues.

 

Also, you could whip out the oil pressure relief valve plunger and spring, rotate the engine by hand backwards and squirt some engine oil in to prime the galleries, then rotate the engine again by hand to see if it gets smoother and more free. This could highlight any bearing issues.

 

Might be worth checking that you have no sticking valves while you're at it by taking the rocker cover off, by doing this you could also quickly check that the valves are operating and using the TDC mark on the crank pulley. 

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#1 turbominicooper

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Posted 15 October 2016 - 03:05 PM

ok so as above the starter motor is very slow to turn the engine over - with or without spark plugs in!

 

i sourced 2 other starters and both did exactly the same.

 

ive cleaned up all connectors and checked earth straps

 

the battery is rubbish however i have used another car to aid in jumping. delivering 13v to the starter motor.

 

i am able to move the car in gear suggesting the motor is not fully seized.

 

i have also connected the starter motor, power and earth cables to another engine that turns over fine (with and without spark plugs in).

 

so my question i suppose is what else could be wrong?

 

history: i bought this car as a non runner with a possible immobilsier problem and it looks as though it may have been modified internally - could something been over torqued internally?

 

reluctant to engine swap if i dont have to - any ideas?

 

will post video later for better description.

 

cheers,

ryan



#2 sledgehammer

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Posted 15 October 2016 - 03:40 PM

can you turn by hand , no plugs ?

 

if so probably not seized

 

use slave battery , jump direct to starter +ve terminal

 

then jump -ve to the block - how does it turn over ?

 

look at the cheap things first



#3 neal

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Posted 15 October 2016 - 03:42 PM   Best Answer

Have you tried turning the engine over by hand using a spanner/socket & ratchet, you might be able to feel if there are any tight spots.

 

Might be worth squirting a bit of WD40 or engine oil down the spark holes after you have turned it over, then turn it over again by hand to see if there is any difference. This could highlight any bore issues.

 

Also, you could whip out the oil pressure relief valve plunger and spring, rotate the engine by hand backwards and squirt some engine oil in to prime the galleries, then rotate the engine again by hand to see if it gets smoother and more free. This could highlight any bearing issues.

 

Might be worth checking that you have no sticking valves while you're at it by taking the rocker cover off, by doing this you could also quickly check that the valves are operating and using the TDC mark on the crank pulley. 



#4 pdaykin

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Posted 15 October 2016 - 04:11 PM

Had the same issue recently. Turned out to be a siezed alternator

#5 neal

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Posted 15 October 2016 - 04:14 PM

I'd check the water pump as well while you're at it.

#6 Dusky

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Posted 15 October 2016 - 05:43 PM

Too much ignition advance Does this too.

#7 turbominicooper

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Posted 15 October 2016 - 05:51 PM

Have you tried turning the engine over by hand using a spanner/socket & ratchet, you might be able to feel if there are any tight spots.
 
Might be worth squirting a bit of WD40 or engine oil down the spark holes after you have turned it over, then turn it over again by hand to see if there is any difference. This could highlight any bore issues.
 
Also, you could whip out the oil pressure relief valve plunger and spring, rotate the engine by hand backwards and squirt some engine oil in to prime the galleries, then rotate the engine again by hand to see if it gets smoother and more free. This could highlight any bearing issues.
 
Might be worth checking that you have no sticking valves while you're at it by taking the rocker cover off, by doing this you could also quickly check that the valves are operating and using the TDC mark on the crank pulley. 


- primed oil
- sprayed wd
- set tappets

Jobs a gooden!

Thanks Neal




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