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Username Post: Starter not turning flywheel        (Topic#365467)
wreakhavoc 
Poster
Posts: 73

Reg: 12-09-07
06-08-21 11:14 AM - Post#2821347    

2000 Chevy van Express 2500, 350 engine.

I can't see how this has anything to do with it but yesterday I replaced the fuel pressure regulator which involved removing the upper plastic platform that fastens to the top of the intake manifold, the throttle body, all of the fuel injection connectors, fuel lines etc.
This morning after I reassembled everything and turned the key to start the engine the starter gear jammed on the flywheel. I removed the starter and hooked it up to a battery charger and the gear comes out and spins great just like it should. I reinstalled the starter and tried it again but the same thing keeps happening.

Any ideas?
Thanks.



 
george88gta 
"17th Year" Silver Supporting Member
Posts: 2045
george88gta
Loc: new york
Reg: 04-23-03
06-09-21 04:51 AM - Post#2821398    
    In response to wreakhavoc

Before you go any further. Try to turn the engine over with a breaker bar attached to the crank bolt, dont force it, it should turn over with a minimum of effort. It could be hydraulic locked. It maybe a good idea to remove the spark plugs to see if you can manually turn the crank.



 
wreakhavoc 
Poster
Posts: 73

Reg: 12-09-07
06-11-21 07:25 AM - Post#2821477    
    In response to george88gta

It won't turn at all...
Researching "hydraulic locked" I see the remedy is to remove the spark plugs and turn the engine over to expel gas from the top of the pistons.

What would have caused this? I did not remove or mess with the injectors, just replaced the fuel pressure regulator according to the service manual and put everything back together on top of the intake manifold.



Edited by wreakhavoc on 06-11-21 10:03 AM. Reason for edit: No reason given.

 
george88gta 
"17th Year" Silver Supporting Member
Posts: 2045
george88gta
Loc: new york
Reg: 04-23-03
06-11-21 07:55 AM - Post#2821480    
    In response to wreakhavoc

Hydraulic locked is when the fuel gets in to the cylinders and cant be compressed, so the engine locks up. Just offered it up since you did some major work on the fuel system. Doesnt sound like your issue. Check the oil ( pull the dipstick) to see if you smell traces of gas. May have finally drained down past the rings.
Did you undo any of the cables? Check the main wire from the battery to the starter. On my 03, the wire runs from the battery to a junction box on the left ( drivers )side of the engine and then over to the starter.




 
wreakhavoc 
Poster
Posts: 73

Reg: 12-09-07
06-11-21 09:56 AM - Post#2821484    
    In response to george88gta

That was indeed the issue. I took out all of the spark plugs and on #5 and #6 fuel started seeping out as the plugs were loosened. On #6 fuel literally poured out when I pulled out the plug.

Now I can spin the motor freely from the crank bolt. What is the next step?

Edit: After I reinstalled everything from changing out the fuel pressure regulator and the engine would not turn over I replaced the starter as I thought maybe it was bad and too weak to turn the engine so yes I disconnected the battery cable to change out starters.



Edited by wreakhavoc on 06-11-21 10:05 AM. Reason for edit: No reason given.

 
george88gta 
"17th Year" Silver Supporting Member
Posts: 2045
george88gta
Loc: new york
Reg: 04-23-03
06-11-21 10:31 AM - Post#2821485    
    In response to wreakhavoc

If you have that much fuel in the cylinders, it probably washed some of the oil off the cylinder walls. I would suggest that you remove all the plugs and put a small amount of engine oil in each cylinder. Turn the engine over a few times, by hand and then do an oil/filter change. You should be OK after that. As a word of caution, an hydraulic locked engine can damage( bend) a connecting rod.



 
wreakhavoc 
Poster
Posts: 73

Reg: 12-09-07
06-11-21 11:10 AM - Post#2821489    
    In response to george88gta

As I said I already removed the spark plugs. Now when I turn the key to crank the engine a large amount of fuel is spraying out the #5 and #6 spark plug holes so if I put them back in it's just going to cease up again.

After I get this all sorted out I may take your advice and change the oil.



 
george88gta 
"17th Year" Silver Supporting Member
Posts: 2045
george88gta
Loc: new york
Reg: 04-23-03
06-11-21 02:41 PM - Post#2821496    
    In response to wreakhavoc

Just guess, but it sounds like #5 and #6 injectors are stuck in the open position and as soon as pressure comes up, fuel is flowing thru the injectors. They could be dirty. Dont know much about these spider type of injection systems, hopefully one of the more knowledgeable members will see this and offer some advice. Let us know what you find.



 
rockfangd 
"8th Year" Gold Supporting Member
Posts: 3107
rockfangd
Age: 35
Loc: Utica ny
Reg: 04-13-10
06-11-21 05:16 PM - Post#2821498    
    In response to george88gta

Sure sounds like stuck injectors to me. If you are having the issue with 2 it is probably best to do all of them. That is a bad leak.
Good Call on the hydrolock, nailed it right on

Old School GM fan FOREVER


 
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