I was able to see part of the cylinder wall / ring through the mount for the muffler, and I did see some gouging on the piston / ring. it is a penetrating oil that attacks the rust that has built up. If it's stuck for another reason, say a spun bearing, then perhaps you may have other thoughts of freeing the engine. Once it breaks loose, turn it over by … The engine, OTOH, is–at least–stuck. Thanks I did not know that about the magneto ignition. In my experience most penetrating oils (PB Blaster is my personal favorite) work well when dealing with iron oxide (rust). fyi, WD is NOT the same Reviewed in the United States on June 14, 2017 Great stuff for seized … I''ve unstuck a couple engines this way. PB blaster in the cylinders and a day or so!!!! I was wondering if anyone had a better way to free up the stuck pistons so I can knock them out and overhaul the engine. if it does not turn over I would say your screwed. On the small engines most of us are working on you can bet that if you can’t rotate it by hand, it’s probably seized. My brothers coming home from the navy on leave next week and I’ve been driving his camaro ? The engine is locked up and I told him we could at least pull the injectors and fill the cylinders up with PB Blaster or whatever? Or is it dry, without oil? Normally you let the engine sit for a few days before starting the restoration process. Spray a good penetrating oil at the base of the plug. Thanks and sorry for the lengthy story! in the last week I have freed stuck rings and loosened the Flywheel on the '73 6hp I'm fixing up. I squirted "PB Blaster" penetrant into the cylinders, and tapped the pistons lightly daily. Thankfully, just because an engine has seized does not necessarily mean that the entire engine must be rebuilt. I just got a 92 blaster for a winter project it has a seized engine? Once it breaks loose, turn it over by hand a few times and then throw a battery in it. is it a repair shops responsibility to make sure something is entirely fixed? – alephzero Sep 16 '18 at 19:20 Fill it up. A common scenario when working on bicycles is steel hardware stuck in aluminum frames. I have a 9K3 IH .The engine is seized from moisture.Can anyone tell me the best thing I can use to free it up?Kerosene or diesel fuel? Are all the cylinders seized or just one or two? But no harm trying one thing and, if that doesn't work, trying again. I squirted "PB Blaster" penetrant into the cylinders, and tapped the pistons lightly daily. I have unsiezed quite a few using WD-40. ? Car engines with a high-mileage can benefit from the penetrating oil for a seized engine as it will help to protect their moving parts, as well as standing the test of time in not freezing, melting or running off. Could do a quick blow by test with shop air to get a better grasp of the problem. Was stored in his shed for at least 10 years. So what sort of secret formulas do you folk suggest? It got LOTS of crap out of there and I think will help the pistons slide once I get 'em moving. Best of luck :D Might just be an opportunity to pull the pistons and bore it over right? can't turn over the engine. If there had been a loud knocking noise instead it might be worse (a noise like the piston coming apart.) This is the time to soak the piston and cylinder with my mixture of carburetor gum-out and kerosene. W116 Addict; Posts: 3,316 ; Location: Melbourne; Help with seized / locked up engine. Oh, and PB Blast will cut carbon. 2. Current bike..1977 kz1000 1075cc kit,dyna everything,lotsa chrome,kerker pipe. I then typed in "how to fix a seized lawn mower engine," and Jackpot! Squirt in some more PB blaster (less evaporative than WD40). I have 5 pistons/rods that are still stuck however. Try PB blaster about $4.99 I have had good luck with it, get it at any auto parts store, if that doesn't work pull head and pound on pistons with block of … « on: 12 March 2009, 08:43 PM » A friend of mine has an old P76, he's actually the father of a guy I used to work with. Dump some wd-40, ATF, and PB Blaster down each cylinder and let it sit for a few days. Take it slow - take out the plug and squirt in some PB blaster and let it soak in. I've been dousing them with PB blaster and Marvel Mystery oil. Any engine cylinder with considerable rust will need to come apart. Tomorrow, try pulling on the starter rope. If you think your engine is seized, you need to confirm that before doing anything else. I emptied almost two and a half cans of PB blaster into the the cylinders and let it set for a week and it freed the engine up. Tom 07-19-2006, 07:49 AM #2. Re: Help with seized / locked up engine. leave it for a week, try and turn it over. Always love a good engine problem With the talks about cons of PB blaster, this product is almost perfect; even in the debate between PB blaster vs liquid wrench, PB blaster is far more superior than liquid wrench, with its affordability, consistency and efficient dealing with seized bolts. Thankfully, just because an engine has seized does not necessarily mean that the entire engine … If so click here! my approach to seized engines that sat in junkyards for 30 years, has always been brute force oriented- remove heads, oil pan, as many pistons/rods as would come out, then grit blast rust above piston, lube, and try to pound out piston- if it didn't come out, then drill a number of large holes in piston top, so piston would collapse when I hit it with 6 foot long pipe and sledgehammer. The old engine is seized so I cant rotate it to get to the TC bolts. Want to build this thing right and have it for a while . Then leave the plugs out and put a breaker bar on the front crank bolt and give it a push. can't turn over the engine. On larger engines you’ll want to use a breaker bar to see if it will turn. FYI; if it is actually seized and you plan to rebuild this engine, remove the pistons and rings and scrape all the carbon lodged from the ring areas. One that comes to mind was a McCormick - Deering 10-20. One of my landscaping customers recently gave me a 1970 Merc 7.5. Since the engine squeeled and then seized, there is hope. Check Price. Since the engine squeeled and then seized, there is hope. First, you must determine whether the engine is truly seized or locked up, which will require removing the spark plugs. But, after sitting for 10 days or so, won't budge. It also contains a non-evaporating lubricant that saves time and equipment and protects against further rust and corrosion. I just started soaking the Buick with it, so we'll see if it helps. Re: Breaking loose a seized engine I extracted the crank out of my Studebaker engine. [Log in to Reply] Frank 09-27-2003 15:18:49. let it sit for 24 hours, then try using a breaker bar to turn the engine over. Next, you must lubricate the engine, with products such as WD-40 or PB Blaster. I don't know if that's from knowing the history of the machine, or if it's from an assumption. Kano The company boasts of selling its products to 480 of the Fortune 500 companies around the world. and put in a new pcv valve too. Before you get out the sledge hammer and a block of wood and start pounding your meat there are a few things to consider. Often seized pistons will free themselves when the engine cools down, but apparently yours didn't do that, so the simplest fix (and the quickest, unless you want to spend a lot of your own time working on it) is "don't bother taking anything apart, just replace the whole engine". I emptied almost two and a half cans of PB blaster into the the cylinders and let it set for a week and it freed the engine up. It does not take but a few minutes with PB Blaster in the chamber, But be sure to change the oil before you start the engine and when (not if ) The PB blaster breaks it free let it run a few minutes and Change the oil again. First take the spark plug or the igniter out of the head and put the cylinder with the stuck piston and ring in a vertical position. Spray PB Blast in the cylinders and let it sit, have a cup of coffee.... then work the crank back and forth.... it should free up the engine. Dump some wd-40, ATF, and PB Blaster down each cylinder and let it sit for a few days. Take it slow - take out the plug and squirt in some PB blaster and let it soak in. I'd fill up the cylinders through the spark plug holes and let it sit at least overnight. For the sake of clarity I will number the cylinders 1-2-3-4. (was stored dry) still works great. By getting the head warm, it … Finally, you must get the engine moving again through the use of pressure or force. 5.0 out of 5 stars With PB Blaster and these tips, u can usually remove a seized nut or bolt. new jaguar XJ6 seized engine. Often seized pistons will free themselves when the engine cools down, but apparently yours didn't do that, so the simplest fix (and the quickest, unless you want to spend a lot of your own time working on it) is "don't bother taking anything apart, just replace the whole engine". Slowly try working the plug loose. soak the cylinders with a product known as PB blaster. I think you have 2 different issues but the engine is not seized. In no time, the PB Blaster leaked down the sides of two pistons, around the rings and to the cardboard on the floor. Pull on the starter rope. I read in the Nov/Dec 99 issue of Antique Automobile how a guy found an old sprint car and after discovering the engine to be seized, he poured Marvel Mystery Oil in the cylinders and down the carb. Ive got the rockers and plugs out, and LIM off. Also going to Sears to buy a large breaker bar. Penetrating oils have a low viscosity that enables them to seep between cracks and narrow spaces, leaving an oil film inside spaces. I have had old stationary, tractor, auto, and industrial, engines that mice have had a field day in, and mouse urine is not kind to old iron. 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Motor looks good, no signs of a lot of use. I got this vehicle as payment for moving a piano. The two outside cylinders (1 and 4) had the most corrosion, and I assumed they would be the toughest pistons to remove. I tapped on it a bit with the wood end of a rubber mallet. One of my landscaping customers recently gave me a 1970 Merc 7.5. It does not take but a few minutes with PB Blaster in the chamber, But be sure to change the oil before you start the engine and when (not if ) The PB blaster breaks it free let … « Reply #14 on: 25 April 2009, 01:58 AM » An update, my mate sucked out the remnants of what ever he had tried previously and put a can of PB plaster in the cylinders. Im in the process of replacing engines. Whats the most effective method of un-seizing a two stroke engine? After removing the water, I took the gallon of PB Blaster and dumped some on top of every piston. WD-40 is one of the oldest remedies for lots of frozen parts, but there are other better solutions. 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