Engine turns over by hand then stops But the rest of the stuff makes me think it's an electrical issue. I adjusted the valves, pulled the head and removed the carbon. Aug 3, 2022 · I have the engine out on my basket-case rebuild. It doesn't happen often but when it does, the starter won't I can turn over the motor by hand and the crank will turn but the cams dont move at all. Feb 2, 2008 · Any time you do major motor work you should bar the engine over by hand. I went at it at the flywheel and as I kept trying to rotate the engine, it started to turn a little easier, but by a certain point during rotation, it gets hard to turn and then it gets easier, then hard, then easier, etc, etc. Apr 23, 2024 · I'm not sure how easily this engine should turn over by hand, but it's concerning that I couldn't turn it. If they are out, as Ken said, it will hit. Dec 21, 2022 · Turning the engine of a vehicle by hand is possible, though there are certain steps that you must strictly follow in order to do it without damage. In a worth scenario valves collided with pistons. Jun 19, 2012 · I have an unusual problem. Remember, proper maintenance and following manufacturer guidelines are key to a healthy engine. Seems to be totally seized. If I tap the starter, everything turns too. Aug 21, 2012 · I replaced the flywheel and now when I turn the key the motor turns over a full turn and then stops. Again, it won't even turn over. Customer: I'm starting my vehicle, and it turns over but then suddenly stops with a slight grinding noise. The engine would turn over by hand then stop. The vehicle had been sitting for a while, so it was taking 2-3 attempts to Jun 26, 2019 · Flywheel turns halfway then stops on riding mower Briggs and Stratton engine model number 33r8770007g1, Craftsman riding mower. Its got the heads, valve train, all the belts and accessories on the front on it. It’s as simple as that, and anything before the engine firing is considered the process of turning over. I checked the battery, selenoid, And starter. you can't turn clockwise, try counter clockwise, if it moves fairly easy (plugs out) then stops, you dropped a valve. ) - it feels as if the compression is "stronger" than the starter. Feb 12, 2002 · If you have to use more force then that, something is wrong. THEN it turns a full cycle the other way Anyone have any clue whats causing this? PLEASE HELP dont want to spend Customer: The engine turns over, but as it approaches top dead center, it stops completely. reinstalled Oct 26, 2012 · Symptom: My ca 10 yr old riding mower (Craftsman w B&S engine) turns over (barely) once or twice and stops before anything major happens (no firing, etc. Tried to crank it like that with no belts, and again the engine won't turn at all. Mower not starting? Does it spin a little then stop suddenly? Most people assume it's a bad battery or starter, which it could be, but often it's a faulty "compression release mechanism" which is Slowly turn over the motor by hand while watching the piston through the plug hole while taking note of the valve positions. I pull all the belts off, and every single pulley turns just fine, except the crank pulley which doesn't even budge. If you cannot turn your engine crankshaft 360 degrees, you might have the engine out of timing due to the timing belt/chain issue. Had this problem before (6 months ago), so I exchanged the solenoid Mar 10, 2015 · Should a engine turn completely over with a breaker bar on the crank pulley or turn so far and stop. You need to place a socket on the bolt for the crankshaft with a large ratchet or breaker bar and turn it clockwise (while looking at it from the front). So I loosened the belt, removed the cam to check the lifters smooth and shiny, some wear but no domes or spider cracks. May 28, 2024 · Learn the art of turning over a motorcycle engine by hand with ease. engine turn over now???? do this then report back Reply Like C Mar 13, 2021 · Need help motor turns over but half way through the rotation it locks up it will rotate backwards till it locks up again Feb 11, 2010 · Re: turn crank by hand and it stops and hits metal at certain point (bruce_j_f) with the spark plugs out you should be able to turn it over by hand. Next time I used it it shut off made a popping noise and now the fly wheel only make a half rotation then stop. I even drained the oila nd poured 6 gallons of diesel fuel right in the the oil fill and left it for 3 weeks to soak. This can be done at the front from the harmonic damper bolt (if it won't go don't force it cause it ain't a very big bolt) or from the rear with a B/A screwdriver on the starter ring gear teeth. Sep 24, 2020 · I had that kind of problem once when I installed a flex plate with the wrong side of it facing outward. Still will not turn over. There are special tools available to set this timing, as indicated in step 11, to secure the Oct 10, 2010 · You shouldn't be able to grab a pulley and turn the engine over by hand unless you have little to no compression on the engine and make sure that it is in neutral (manual) or park (auto). Dec 16, 2011 · If the engine is turning over some it really sounds like something is in a cylinder that is stopping the piston on the compression stroke . Generally, the belt should be removed when the engine is at top dead center to prevent this issue. Nov 22, 2022 · Have you turned the engine over both CW and CCW? same 270=/-°? If you start tearing into it, I would start with what you worked on last and work your way backwards. The best thing to do is pull the engine and remove the heads to see what the problem is . Was mowing the lawn and flywheel fan blew up into pieces. I can turn the crank pulley almost 360 deg to a point where it stops, then I can go back 360 deg and gets stuck again at same point. It was running fine before. Turning the wheel, everything turns, but then just stops. It's a 17 hp engine for a ride-on mower. Oct 8, 2023 · Engine is a SBF 347fresh rebuildmy question/issue is that once I have the valves adjusted, I have to use a 2 foot breaker bar to turn the engine over. Oct 15, 2004 · I've just installed my head after replacing valves. 3L engine. It moves easy, but only about 180 degrees in either direction. Dec 16, 2011 · I managed to free my engine up by working it forwards and backwards, spent almost a whole day working it back and forth. I suspect the pinion might be stuck out and engaged with the engine. If the engine was turning over by hand before the torque converter was bolted up then you need to work backwards. So what would could this be? If the engine turns over then stops and the flywheel locks when turned backward, check for internal mechanical binding. I've run it for short periods of time, but because of a rad leak, I have yet to run it long term to be sure it is OK. You don't want to turn the engine backwards because the timing chain tensioner can retract After letting the oil penetrate the engine's internal components for a good period of time, turn the engine over by hand with the glow plugs or injectors still removed. Jun 8, 2021 · I tried using my socket wrench at the pulley and it was very difficult to rotate the engine. Mar 21, 2016 · Starting When an engine starts, the mechanical process kicks in and then the engine fires. It just started making this grinding noise yesterday, and there are no leaks. Dec 5, 2012 · The crank will turn over normally for 90 degrees of rotation then hits a hard stop in both directions. Mar 13, 2021 · Have you removed the glow plugs and tried to crank the engine over or tried to bar the engine over by hand? If the engine turns over then stops and the flywheel locks when turned backward, check for internal mechanical binding. If I hold the key it will continue to make a full turn and stop. This is a full tutorial on how to perform an engine rotational test! It is super easy and essential on telling the health of your engine's rotating assembly. If I put my torque wrench on the crank, break away to spin takes 100 ft-lbs?? I'm running AFR 8001 solid roller valve springs (250 seat Apr 30, 2012 · So today after work, I go out there, and just try to simply crank the engine. I have filled the cylinders with PB Blaster for 3 weeks. I am guessing i'll have to crack it open to see whats going on inside. It seems that the pistons are making contact with the valves. This is best done before the spark plugs are installed. Removing the spark plug allows easier rotation, indicating possible cylinder or valve interference. Now, if you hear the engine attempting to turn over but nothing happens, that means the engine isn’t starting, but it’s still turning over. if you jumped some teeth you could have definatly bend some valves. Any thoughts on where to go next? Possibly a valve stuck open from Mar 11, 2014 · question, did you try to go counter clockwise with the strap wrench? does it turn then stop. Troubleshoot common issues, from insufficient clearance to mechanical binding, ensuring smooth diagnostics. You might need to rotate the cams slowly and then the crank to avoid causing any damage. I have to rotate the flywheel back and forth to free it up at which point the starter will engage and start the engine. After taking off the flex plate and installing it with the correct side facing out, problem went away. 5 I/C non ohv engine would crank over hard. The engine literally stops on it's compression stroke and I can reach and grab the vented cover to the fan and turn it through the stroke by hand. I have to release the key and engage the starter to get it past compression stroke, then again, only turns one revolution. If I take the head back off can I still use the new head gasket? On the original head gasket it is marked with two round holes and one long hole. . I have look at the timing chain and its in good shape. Feb 3, 2005 · The belt is still on. We changed the timing chains on it, and i got the heads ported. the motor pauses for about 5 seconds then rotates again. Nov 10, 2013 · I shut it off rotated the engine to check the timing again and now I have a hard stop. I took the starter off too just for good Jun 6, 2020 · Briggs and Stratton 31C707 0154 E1 Starter will not turn the engine more than one revolution. I can spin the motor both ways by hand fine. After you turn over the engine by hand (glow plugs or injectors still removed), use the engine's starting motor to crank the engine. because you played with the distributor. I checked the spark plug and there is plenty of spark. Oct 2, 2009 · Hey all, i've got an engine that when trying to turn over by hand it gets stuck at a certain point and wont go any more. Jun 17, 2010 · Hey, just put the motor back in my 2000 gt. It just seems to jam up when I do it by hand. Dec 26, 2023 · Engine Won't Turn Over by Hand? Explore the underlying causes, potential damage, and essential diagnostic procedures to revive your vehicle's powertrain. It's a 2002 model with a 5. Here is the information from the service manual. Now, we spin the crank by hand, and it turns a full cycle then stops. pull it again. There! Jun 8, 2011 · Any ideas on why a 12. I tried turning the engine with a socket/breaker bar. When turning the crank to TDC it is obstructed just before it gets there. At first there was some resistance and then it started moving. When you get to the beginning of compression stroke both valves should be closed, as the piston travels up the cylinder (generally around 3/4 the way up) you should see a valve open a fraction for a brief instant. If you tried turning the engine only by hand and didn't force anything, I feel confident nothing is bent. Is that a two hole or a Connect a breaker bar which is a long bar socket wrench for leverage and turn the engine clockwise only. You can have more than one vw, but they aren't allowed to be drivable at the same time. Occasionally, the engine on my mower locks up and the starter is not able to crank it. If it turns and then stops, something is binding and you will have to look inside. Nov 2, 2025 · Have you ever experienced a situation where your lawn mower is hard to start, or the mower engine does not turn over completely and only turns halfway? If yes, it must have held you wondering whether it is possible to troubleshoot engine trouble and if possible, how to troubleshoot a mower engine that only turns halfway? Got a car repair question? 2CarPros will answer your question for free by providing information that will help solve your problem quickly. Insert two of the harmonic to pully bolts almost all the way in and use a small pry bar or large screw driver to turn the motor one way than the other. If the engine won't turn with the main chain off, make sure the cams are in the correct position for timing. check all of your timing marks again. Take the starter off and see if it turns by hand. 7c8zdrrt xe pm 107t3min nfps xoc8 wipaw n2rg sud7hcn j6