Engine Wont Crank by Hand...but it cranks with the starter?

[Jeff99GS]

Okay guys this is a 2 part question, I'm helping a friend of mine diagnose their car. They recently had the engine fully rebuilt by a local machinist.The engine turned with a ratchet fine before they put it in the car. Now that the engine is installed into the car it will NOT turn with a ratchet from the crank pulley. The car is NOT in gear and the spark plugs are out of the engine. However when we go to start the car...it turns right over with the starter motor, but it does sound like its turning a little slower than normal.
What the heck would make the engine feel seized like that? Could the starter be staying engaged with the flywheel?

The second question is, there is NO spark in cylinder 2 and 3. We have already replaced the Coil pack with a known good unit. we also replaced the Power Transistor with a known good unit. Still no luck. I'm stumped. Any help would be greatly appreciated.

Jeff

 

[DSM_PWR]

My guess would be something with the drivetrain, perhaps the Clutch/Flywheel hitting something?

You can always try removing the starter and then trying to turn the motor over with a ratchet to see if it is stuck engaged

For Spark
*Try a known working CAS (Crank Sensor if its a 2g)
*Known working ECU

 

[Jeff99GS]

Thanks man, she tried pushing the clutch in and the car rolls freely so it seems to be disengaging okay. As far as the spark...I think you're right, It's gotta be the CAS or ECU. Unless they may have criss crossed some of the wiring plug harnesses. I guess I'll just have to go tear it apart!!!

 

[Afroclipse]

or it might be that timing has jumped and your balls don't have the strength to crush your valves into the pistons, by using the starters power you have found an effective to bend your valves.

 

[BLINKY619]

or it might be that timing has jumped and your balls don't have the strength to crush your valves into the pistons, by using the starters power you have found an effective to bend your valves.

been there with my first car... no a exiting thing to happen...!!!! specially on a recently rebuilt motor...!!!

 

[Jeff99GS]

Well luckily it's NOT my car haha...my friend just called me and said her car wont start. So I went over there to check the timing marks. But like I said I cannot turn the crank to line anything up. I'm going to look at the car again on Saturday, So maybe I'll pull the starter and timing belt.

 

[CHAR-FT]

Time for a 6 bolt swap, after you check the valves that is.

HKS-272,Holset,6Bolt,Harness,Sensors, LOOK! - DSM Classifieds

 

[Jeff99GS]

Thanks, she already has a 6 bolt swap...The car was a GST and she swapped it to AWD with an HX35/ DSMlink/1000cc injectors and all that stuff...It made about 460whp. But they recently had the engine bored 40 over with new wiesco piston...and I guess when they put the engine back in the car that's when all the problems started.

I just wondered if anyone had any troubles with the starter Binding up and NOT allowing the crank to turn by hand. According to her, they used the AWD starter plate...so I dont see any reason it would bind up like that? I'm just going to have to go tear it apart and see whats going on