My intention is to try to run the 5.7 L GM/merc removed from my project 2556 on my DIY engine stand. Engine has a frozen block. Never done it before so need little advice....Here is the situation now. Engine is removed from boat, it is pretty much untouched but
have done a few things. No visible cracks but there was water in the bottom of oil pan. Engine moves freely when turning with a wrench(plugs off), not much visibility but can not see anything special from spark plug holes. I guess its only a theoretical possibility but
hoping it is only damaged head gasket....but guess more likely damages in lifter valley.
- removed electric fuel pump, planning to run it as gravity feed fuel supply
- removed power steering pump
- obviously removed the wiring harness connector.
- fogging oil through spark plug holes
- oil change
At this stage planing to start it without water supply as a dry engine(but oil of course), if it starts only running for let say 20 sec to check how its working. Is this a bad idea? what happens to the circulation pump?
Other option is to run it on the garden house but obviously then need to connect the alternator to have the circulation pump running( due to the belt) and also water will be leaking in the engine, is this a better idea? Do i need to do some special wiring if running
the alternator not to destroying it if the engine starts?
To get the engine running, planning to connect/wire it as following, is this OK?:
gravity feed fuel supply
Battery + to big post on starter solenoid.
Battery - ground to engine block
Coil power from battery + through on/off switch to coil +
Start wire from Battery + through start button to start terminal on starter solenoid.
Here the wiring questions: It has a thunderbolt ignition, do i need a resistor to the coil and if so, what type of part i am looking for(don't know much about resistors). Another one, do do i need a separate points wire from distributor
to coil or is existing engine wiring sufficient?
A lot of questions , sorry for that
have done a few things. No visible cracks but there was water in the bottom of oil pan. Engine moves freely when turning with a wrench(plugs off), not much visibility but can not see anything special from spark plug holes. I guess its only a theoretical possibility but
hoping it is only damaged head gasket....but guess more likely damages in lifter valley.
- removed electric fuel pump, planning to run it as gravity feed fuel supply
- removed power steering pump
- obviously removed the wiring harness connector.
- fogging oil through spark plug holes
- oil change
At this stage planing to start it without water supply as a dry engine(but oil of course), if it starts only running for let say 20 sec to check how its working. Is this a bad idea? what happens to the circulation pump?
Other option is to run it on the garden house but obviously then need to connect the alternator to have the circulation pump running( due to the belt) and also water will be leaking in the engine, is this a better idea? Do i need to do some special wiring if running
the alternator not to destroying it if the engine starts?
To get the engine running, planning to connect/wire it as following, is this OK?:
gravity feed fuel supply
Battery + to big post on starter solenoid.
Battery - ground to engine block
Coil power from battery + through on/off switch to coil +
Start wire from Battery + through start button to start terminal on starter solenoid.
Here the wiring questions: It has a thunderbolt ignition, do i need a resistor to the coil and if so, what type of part i am looking for(don't know much about resistors). Another one, do do i need a separate points wire from distributor
to coil or is existing engine wiring sufficient?
A lot of questions , sorry for that

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