 Seized engine, Cannot remove barrels from crank case |
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| Aayala |
 Jan 21 2026, 01:24 PM
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#21
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Member  Group: Members Posts: 60 Joined: 7-July 25 From: Austin Tx Member No.: 28,874 Region Association: South East States  |
QUOTE(rick 918-S @ Jan 21 2026, 07:09 AM)  I would just break the pistons and not worry about damaging the cylinders. There is no way you are reusing them anyway. Banging on the tops are banging the rods on the crank. Piston/cylinders are available new and the prices are no terrible. For my information only... haha How exactly do you break the pistons if the case is assembled? Just was trying to visualize and got curious, not sure how that is possible. |
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| porschetub |
Jan 21 2026, 03:05 PM
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#22
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914 Guru Group: Members Posts: 5,190 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
In this case heat is essential to freeing up the seizure between the piston rings and the bores , continue heating and using penetrant ,don't be afraid to get the parts nice and hot as you need to break the rusted area ,a meduim size butane bbq lighter will do the trick ,cheers.
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| rick 918-S |
Jan 21 2026, 05:51 PM
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#23
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Hey nice rack! -Celette Group: Members Posts: 21,364 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region 
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QUOTE(Aayala @ Jan 21 2026, 01:24 PM) QUOTE(rick 918-S @ Jan 21 2026, 07:09 AM) I would just break the pistons and not worry about damaging the cylinders. There is no way you are reusing them anyway. Banging on the tops are banging the rods on the crank. Piston/cylinders are available new and the prices are no terrible. For my information only... haha How exactly do you break the pistons if the case is assembled? Just was trying to visualize and got curious, not sure how that is possible. Break off the cooling fins and use a cut off wheel to cut a slit in the barrel. Use a chisel from the top to spread the barrel. |
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| rgalla9146 |
Jan 22 2026, 08:33 AM
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#24
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Advanced Member Group: Members Posts: 4,998 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
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QUOTE(rick 918-S @ Jan 21 2026, 06:51 PM) QUOTE(Aayala @ Jan 21 2026, 01:24 PM) QUOTE(rick 918-S @ Jan 21 2026, 07:09 AM) I would just break the pistons and not worry about damaging the cylinders. There is no way you are reusing them anyway. Banging on the tops are banging the rods on the crank. Piston/cylinders are available new and the prices are no terrible. For my information only... haha How exactly do you break the pistons if the case is assembled? Just was trying to visualize and got curious, not sure how that is possible. Break off the cooling fins and use a cut off wheel to cut a slit in the barrel. Use a chisel from the top to spread the barrel. I agree. But keep in mind that you can damage the barrel spigots on the case if you get too rough with this method. Fasten the barrels tight to the case during the cutting. A sawsall is another good cutter. Brutal stuff. |
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| friethmiller |
Jan 22 2026, 09:26 AM
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#25
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Senior Member Group: Members Posts: 1,592 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region
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QUOTE(rgalla9146 @ Jan 22 2026, 08:33 AM) I agree. But keep in mind that you can damage the barrel spigots on the case if you get too rough with this method. Fasten the barrels tight to the case during the cutting. A sawsall is another good cutter. Brutal stuff. I've done this before on an old 1.7 engine that was completely locked up. Included a pic. Keep in mind that once the cylinders are off you still need to remove the pistons to split the case. If I remember correctly, it was easier on the case to cut the pistons clear at the wrist pins. This looks horrible, I know, but I was able to save this "W" block and get it reconditioned for a rebuild. (IMG:style_emoticons/default/biggrin.gif)  |
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| Aayala |
Jan 22 2026, 12:51 PM
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#26
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Member Group: Members Posts: 60 Joined: 7-July 25 From: Austin Tx Member No.: 28,874 Region Association: South East States |
QUOTE(friethmiller @ Jan 22 2026, 09:26 AM) QUOTE(rgalla9146 @ Jan 22 2026, 08:33 AM) I agree. But keep in mind that you can damage the barrel spigots on the case if you get too rough with this method. Fasten the barrels tight to the case during the cutting. A sawsall is another good cutter. Brutal stuff. I've done this before on an old 1.7 engine that was complete locked up. Included a pic. Keep in mind that once the cylinders are off you still need to remove the pistons to split the case. If I remember correctly, it was easier on the case to cut the pistons clear at the wrist pins. This looks horrible, I know, but I was able to save this "W" block and get it reconditioned for a rebuild. (IMG:style_emoticons/default/biggrin.gif) HOLY! (IMG:style_emoticons/default/sawzall-smiley.gif) that looks pretty brutal! Thanks for sharing Fred! Glad you got to reuse the case, way to go! (IMG:style_emoticons/default/aktion035.gif) |
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