73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: hotrod24 on November 27, 2015, 05:00:53 pm
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WoW it has been a while since I posted on here!!! Ok I have a 1980 c10 short bed with a 250 inline 6 it has all ways been a good running truck till now. I have been replacing the floor so it has not been cracked it in a year. All it will do when you hit the switch is turn over half way???
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can you clarify please? when you hit the starter it only rotates a little and stops? or you hit the starter and it turn halfway and now wont move? does the starter keep going but motor stops? that's about 3 quick scenarios I can think of out of a possible dozen
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pull the spark plugs and see if it cranks freely
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Ok vile I will try that!!! The 250 will turn over half way then stop and nothing the starter does not click or anything!!!
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Did you check for dead battery and/or corroded cables?
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It did have a dead battery but I charged it and now it reads 13 volts. The cables are in good shape!!!
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Just cause a battery has 12-13 volts does not mean it is good. Load testing is the only way to know for sure. Double check grounds(all of them)
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Ok I tested the battery with a muiltmeter and it read 12.20 v It should be like 12.60 v???
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ok does it crank over 1/2 way each time you hit the starter or does it recoil back to where it was? was it full of antifreeze when you parked it? there are so many variables that play into factor...if you pulled all the spark plugs and it still does it then that eliminates anything type of liquid in the cylinders...and it also eliminates a clogged exhaust system.
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It cranks 1/2 way each time you hit the starter!!! As far as I know it has anifreeze. I still need to pull the plugs!!!
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it sounds like the starter is giving out....have you tried jumping the starter? it could very well be a starter solenoid.
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Perform a proper load test on that battery. And...
pull the spark plugs and see if it cranks freely
Both recommendations are fundamental to your complaint.
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Ok I tested the battery and it is good. So that means its the starter. So I took it off and I am going to swap drive housing...
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Ok today I tested the starter and it is fine!!! So I guess that points at the wiring or the motor??? Tomorrow I will try and turn the motor over by hand!!!
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Ok next question?.....is it an automatic or manual transmission? If it is a manual it is possible that the clutch froze to the flywheel from sitting.....if it is a manual jack the back tires off the ground and try to crank it.
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The truck is a automatic!!!
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Sounds like flash rust inside the cylinders, but how did you test the starter? Parts store testers dont put a load on the starter drive gear. Turn the motor over by hand and see if it stops that way too. Have you pulled the plugs yet?
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I tested the starter with jumper cables!!! Yea I am going to turn the motor over by hand on Monday and no I have not pulled the plugs yet!!!
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Did you remove the starter and test it, or was it still mounted? If removed, again, you can't load the drive gear, so the starter may spin fine, but won't turn over an engine. If it was still mounted and cranked the engine over just fine, then you're up against a wiring problem.
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Ok one time I had a vehicle do that and what happened was the timing chain broke....if you pulled all the plugs and tried to crank it and it did the same thing and it is an automatic and you had the starter checked out.....have you tried to turn the motor over by the harmonic balancer? try to turn the motor in each direction...and if the motor stops while turning it by hand try to listen to see if you can hear a cluck or some noise and where abouts you hear it at.
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Ok I put some bolts in the harmonic balancer and was tighting them up so I could turn the motor over and when I got the one bolt just tight. The motor turned and it kept turning then stopped so I took my bracker bar and started turning it more. It felt like it was a little stuck!!! Oh and I did not take out the plugs yet...
I also swaped starter housings so I will be putting it on!!!
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ok take the plugs out...it could possibly be something like fuel or water in a cylinder causing it to lock up....you would be surprised.
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Ok Thanks!!!
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keep us informed on what you do....take the spark plugs out and then try to crank it...look for anything spewing out of any of the cylinders if it is able to keep cranking over.
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Ok I pulled the plugs and it turned over faster. So I guess it was a little stuck. I put the plugs back in and starter and battery and hit the switch and it turn over!!! Yay!!!!
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glad you got it running :)
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Thanks for all yalls help!!!
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did you pull the spark plugs?
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Yea I pulled the plugs! But I think I am going to have to do it agian and put some oil in the cylinders. Because it still is not turning over like it was!!!
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lol i never saw the second page
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It's cool man. I have done it before!!!