Frozen block
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=43305
Printed Date: October-06-2024 at 2:17pm
Topic: Frozen block
Posted By: velde99
Subject: Frozen block
Date Posted: August-01-2018 at 10:20pm
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Any suggestion on ways to unfreeze a sitting motor? I have seen online mystery oil and sea foam. I bought a 351 that has sat in a garage for a while. PO was certain it wasn’t frozen when it went into the garage. I put a breaking bar on it, but nothing. I removed spark plugs and sprayed mystery oil in it and plan to let it soak. How much pressure does it take to try and see if one of these motor moves? I am pushing downwards ( since that is the way the bolt tightens), but wasn’t sure if it mattered on a reverse rotation engine. Any advice would be appreciated. |
Replies:
Posted By: bwinn
Date Posted: August-01-2018 at 11:04pm
| I’ve had good luck loosening the journals for the rods after a good soaking. Then try to turn it (slight hammering) back and forth carefully. |
Posted By: velde99
Date Posted: August-01-2018 at 11:19pm
So not to sound stupid, but to do that I would need to flip and remove oil pan? |
bwinn wrote:Posted By: Gary S
Date Posted: August-01-2018 at 11:25pm
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Most likely the rings are just stuck to the cylinder walls. Use some ATF and acetone in the sparkplug holes,then put the plugs back in so that the acetone does not evaporate. Let it sit for say a week then try turning it.Don't pull the pan..... ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: bwinn
Date Posted: August-01-2018 at 11:41pm
Correct this method would require oil pan removal. Of course this would be a last resort after soaking efforts were unsuccessful. |
Posted By: TRBenj
Date Posted: August-02-2018 at 12:01am
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Try a fresh coat of paint? = rebuilt |
Posted By: Hollywood
Date Posted: August-02-2018 at 12:45am
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Paint in the spark plug hole? Try buying another engine out from someone else. |
Posted By: velde99
Date Posted: August-02-2018 at 3:29am
Not sure what your comment is implying. |
Posted By: MrMcD
Date Posted: August-02-2018 at 5:15am
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I will throw you a tip most have never heard of. Fill each spark plug hole with Coca Cola. Let it sit for 2 weeks. The coca cola will eat most of the rust out of your system while doing no more damage. Drain the coca cola, after the 2 week time period. Fill each spark plug hole with a 50/50 combination mix of Acetone and Tranny fluid/ATF. This combo has proven to help break rust loose. The old Ford ATF had more lubricants in it but any ATF will work. Let the ATF/Acetone mix soak in for 2 days. See if it will rotate ------------- |
Posted By: velde99
Date Posted: August-02-2018 at 12:00pm
👍🏻 Will try some of these methods. Appreciate the suggestions. |
Posted By: halfnelly
Date Posted: August-02-2018 at 12:11pm
The active ingredient here is phosphoric acid, which reacts with iron oxide (rust) but not the iron itself. You can skip all the corn syrup and secret Coke formula and just get something like this at Home Depot, much stronger anyhow. Won't take 2 weeks to eat the rust: http://www.kleanstrip.com/product/phosphoric-prep-etch" rel="nofollow - http://www.kleanstrip.com/product/phosphoric-prep-etch I've heard this stuff works pretty well too: https://www.evapo-rust.com/product-info/" rel="nofollow - https://www.evapo-rust.com/product-info/ |
Posted By: velde99
Date Posted: August-02-2018 at 12:38pm
| Thanks. I have that product already. I’ll give it a try. |
Posted By: MrMcD
Date Posted: August-03-2018 at 3:44am
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There have been many tests comparing the great rust eaters. PB Blaster is like 4th on the listing. Kroil, while expensive comes in second in most tests. The 50/50 mix of acetone and tranny fluid comes in #1 by a large margin for breaking loose rusted parts. ------------- |
Posted By: MrMcD
Date Posted: August-03-2018 at 3:54am
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You guys think you have experience with old blocks. I called on the large production engine rebuilders that covered the western states. Combined they rebuilt about 2,500 engines per month. I worked with them for over 10 years. Every time they had an odd problem they called and we tried to work it out. There is very little inside an old block I have not seen already. Stuck pistons, not a big issue. If minor rust you take a block of wood, a 2x4 works well and knock the pistons out. If the heads are on and you are tying to loosen the engine go to the coca cola trick and then the 50/50 mix of ATF and Acetone. It works really well to free up rusted parts. I used the 50/50 mix to free up a 50 year old 327 L79 350 HP number match engine for a Corvette that had been stuck for 30 years. The stuff really works. ------------- |
Posted By: 8122pbrainard
Date Posted: August-03-2018 at 7:00am
Yes Mark, I feel I do!  How about a 91 year old! http://correctcraftfan.com/forum/forum_posts.asp?TID=16350&KW=no+needed&PID=194065&title=no-super-sucker-needed#194065" rel="nofollow - No supersucker needed ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: Hollywood
Date Posted: August-03-2018 at 12:35pm
| All my blocks are frozen. If they weren't they would probably melt a hole in the hull. |
Posted By: tryathlete
Date Posted: August-03-2018 at 1:07pm
| I think you told me the were “solider”. |