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Thread: Freeing a Seized 2.25 Engine

  1. 24th December 2012, 06:58 AM #1
    geodon's Avatar
    geodon
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    Freeing a Seized 2.25 Engine

    Unfortunately the PO of my 2.25 took the head off in situ & then just left it there and it siezed.
    I'ts been soaking in Penetrene for weeks and two of the bores are still "watertight" so it looks like the rings have rusted on.
    Any magic cures?
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  2. 24th December 2012, 07:33 AM #2
    chazza
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    Have you tried swinging on the crank-handle, if it is still in the car? This worked for my S1 years ago.

    If you are stripping the engine, I have found that removing the crankshaft and tapping the piston down the bore with a wooden drift and a very heavy hammer usually works,

    Cheers Charlie
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  3. 24th December 2012, 09:06 AM #3
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    Blknight.aus
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    If the engine is out turn it upside down and fill the bores from the back.
    Dave

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  4. 24th December 2012, 09:10 AM #4
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    Mick_Marsh
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    I have seen stuck pistons removed from rusty cylinders by pumping the cylinder full of grease. This was done with the head still on.
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  5. 24th December 2012, 10:03 AM #5
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    wrinklearthur
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    a little movement became more

    Can you by using a big shifter on the nut that holds the front pulley, move the crankshaft at all?

    I used some Diesel down the bores for about six months on a six cylinder 2.6 block, it had come to me with the head off and well and truly rusted. I had a go at it about a week ago and managed to get the crankshaft to spin.

    Took a couple of hours but a little movement became more as I persisted, in the end there was only one piston that wouldn't move a bit at all so a piece of neat fitting pine and a club hammer got that started, it wasn't long before that piston was moving with the rocking of the crank and eventually got the bores clean enough to rotate the crank fully .

    The pistons haven't been taken out of the bore yet, but with the pistons moving up and down has got rid of the rust and the bores don't look too bad at all, ----- lucky for once!
    .
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  6. 24th December 2012, 10:21 AM #6
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    B.S.F.
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    If possible use a lever on the teeth of the fly wheel. W.
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  7. 24th December 2012, 12:48 PM #7
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    Series3 GT
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    I got my 2.25 turning over again by using a lot of oil,petrol and brute force. Took the head off and put some oil in the cylinders let it sit and use the crank and a shifter on the crankshaft pulley. I then used some petrol in the cylinders to eat its way through and again with brute strength it started to get it moving and I just kept turning it and adding petrol til it was turning freely.
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  8. 24th December 2012, 09:48 PM #8
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    I freed up a 'seized' motor by doing the following -

    1. remove the head,
    2. pour oil onto the pistons and leave for one week.
    3. grab a solid block of hardwood and a short handle sledge hammer,
    4. place wood on top stroke piston,
    5. strike wood with hammer (start off gently),
    6. increase force,
    7. do this to all pistons until crank turns

    Worked a treat for one of my motors but unfortunately, the other motor was far too seized to move
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  9. 18th January 2013, 10:45 PM #9
    Chris72 Guest
    Hi geodon, I've used transmission fluid to help free up stuck pistons, though the head was still on the motor at the time, all I did was to pour fluid through the spark plug holes in the head left it for 2 days and it allowed me to turn the motor over with the starter, before I couldn't even turn it over with a lever on the crank.

    Cheers Chris
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