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Thread: Seized my engine!

  1. #1
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    Default Seized my engine!

    I just put in a new distributor and took my 1952 m211 for a test drive. It was running fine but started to get loud while climbing the hill to get out of my neighborhood. I slowed down to check it out but as I slowed the engine stalled out. The starter wouldn't turn the engine at all.

    I've taken out all of the spark plugs and tried turning it by putting a wrench on the pulley. I also tried pulling on the belt.

    I then took out the starter and pried on the flywheel.

    Nothing will budge.

    Ive poured diesel and marvel mystery oil down the cylinders to hopefully loosen it up.

    Any idea why the engine would have seized? It looks like I have plenty of oil on the dipstick. When I was putting in the distributor I may have accidentally cut the wire going to the "oil pressure guage sending unit", would that have done it?

    What should I do from here? Keep trying to loosen up the engine? Part the truck out or sell it whole?

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    4 Star General frank8003's Avatar
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    Oh Golly!
    I was here, had a good time.

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    4 Star General porkysplace's Avatar
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    Default

    Just cutting the wire to the oil pressure sender wouldn't seize the motor , how ever losing oil pressure without a oil pressure gauge to tell you that you lost pressure would.
    Where in Michigan are you ? there is a scrap yard up by Bellaire that had a few GMC's a couple years ago It may be a parts source..

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    I'm in Grand Rapids. Bellaire would be doable if I wanted to swap the engine. However I don't think I have the motivation to do that.

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    4 Star General m1010plowboy's Avatar
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    Default

    Did you put in a fresh engine oil filter and new oil? It's a tough little motor so let's keep some hope.

    We've seen a lot of tar, sticky oil, bitumen, whatever you want to call it, in the filter housing, page 184 TM 9-8024. The drain plug on the filter wasn't big enough to let the blobs out so the outlet line clearly wouldn't let oil in to the motor.

    Goose the deuce barely registers on the gauge with the little 302 only pushing about 5psi. Page 55, same book.

    Time for some troubleshooting, page 152, section IV, #81. It's going to be fine unless it's a Mechanical Seizure of parts.

    pt 1 9-8024.

    https://www.steelsoldiers.com/showth...More-M135-TM-s

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  11. #6
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    Default

    I'm just thinking out loud here.....

    You replaced the distributor.
    Was it running smoothly after you restarted her and THEN became rough under load?
    OR was it running roughly from the very first upon restart with the replacement of the distributor..... If this is the case, I might suspect that you may have mis-wired the sparkplugs (wrong firing order) and thereby, at a certain rpm/load/fuel-flow and hence LARGER EXPLOSIONS in the cylinders one of the pistons and its connecting rod may have FAILED.... This COULD cause the crankshaft to be mechanically JAMMED thus preventing it from turning at all.

    But again, I'm just guessing that a firing order error COULD have occurred with the re-installation of the distributor. That's why it'd be good to know if she idled smoothly or was coughing and/or backfiring before the test drive.

    Anyone else have any thoughts on this???

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    Idled smoothly beforehand. Ran the same as it ran on the old distributor. The idea that something may have gotten in the oil filter assembly lines when I took out the old distributor is possible.

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    Big wheeler cat peeler Valley Rock's Avatar
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    Pull that distributor out and see if it will turn over .
    1952 GMC XM211 Water Truck (For Sale)
    1963 Studebaker M50 Water Truck
    1991 BMY M931A2 Tractor currently being converted to water truck

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    Could the distributor hold down have been left loose and the distributor timing changed under load causing preignition and cylinder damage? Years ago i bought a 1980 k10 with a swapped in 454 from a kid in north delta..by the time i dove it the 20 miles to my place the exhaust manifolds were cherry red..timing was set at 10 after top center..

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    4 Star General tobyS's Avatar
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    Is there an oil pump drive that comes off the bottom of the distributor? If there is, are you sure you got it back into place?
    M35A3 4x4 "Money Pit"
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