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07-21-2017, 08:56 PM | #1 |
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Engine question
So I have an old engine sitting here, when I turn it over using a ratchet wrench, with the plugs out, it will at a certain point catch and requires a little oomph to continue turning, as if something caught or is rubbing then a little further on it catches again a requires a little more pressure to get it to continue around. Catches only those two places. This engine had been sitting for quite a few years. Any thoughts anyone as to why it would catch in two places??
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07-21-2017, 09:08 PM | #2 |
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Re: Engine question
Rust. Maybe in a clylinder or 2, put some oil down each plug hole.
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07-21-2017, 10:30 PM | #3 |
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Re: Engine question
does it seem to catch at the top/bottom of the strokes?
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07-21-2017, 10:31 PM | #4 |
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Re: Engine question
Stuck valve
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07-21-2017, 10:47 PM | #5 |
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Re: Engine question
Pour a little Marvels Mystery Oil down all four plug holes and turn it threw a few revolutions. Come back tomorrow and repeat. Observe the difference. You will probably be amazed, yet I would still pull the head and pan to check further before trying to fire it up. Pull the dipper tray and clean out the sump and the screen on the oil pump as well as checking valves, seated and the bores.
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07-21-2017, 10:48 PM | #6 |
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Re: Engine question
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07-21-2017, 11:18 PM | #7 |
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Re: Engine question
When the crank throws are at 9 o'clock and 3 o'clock , pistons are half way down the bores, it is considerably harder to turn. It may just be normal.
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07-21-2017, 11:22 PM | #8 |
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Re: Engine question
Would there be any harm in removing the side plate (valve cover?) to make sure all of the valves are moving as they should?
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07-21-2017, 11:28 PM | #9 |
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Re: Engine question
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07-22-2017, 01:12 AM | #10 |
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Re: Engine question
How about a little more information to help us with our guesses. When does it "bind"? Is it in the same place every rotation, every second rotation? As different things happen at different places as the different parts rotate knowing when it happens can tell alot before you even open up the engine.
Can you find the timing dimple? Starting there and keeping track of when in the rotation you feel the bind we can deduce that is happening at that time with the moving parts of the engine.
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07-22-2017, 08:09 AM | #11 |
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Re: Engine question
All good answers.
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07-22-2017, 10:03 AM | #12 |
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Re: Engine question
I've had carbon turn loose after setting for a long time. Could be some piled up on top of a piston or two. If it has laid on the drivers side a good possibility.
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07-22-2017, 10:47 PM | #13 | |
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Re: Engine question
Quote:
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07-23-2017, 08:47 AM | #14 |
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Re: Engine question
And after you've listed ALL the possibilities, ALPHABETICALLY, you tear it down to BARE BONES & find it wuz something "OFF THE WALL" that you never heard of---NLOL
Bill W.
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07-24-2017, 12:00 AM | #15 | |
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Re: Engine question
Quote:
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