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Shane1304 
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Joined: 23 May 2023
Location: Ohio
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 Topic: 1942 AC ‘C’
Posted: 23 May 2023 at 8:45pm |
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Recently purchased a 1942 AC C at an auction which had a stuck motor. I tore the top end of the motor down, cleaned it, lapped the valves and got the motor unstuck. I have two questions I’ve come across during this process. The first is, the number 2 piston was the main culprit being stuck in the bore. While freeing the piston it raised the sleeve out of the block about 3 inches. I was able to reseat the sleeve but should I now be concerned about coolant/oil contamination leaking from the coolant passages into the bottom end? The second question is, when I replace the the head with the new gasket is it recommended to use any type of sealer/RTV, gasket maker, to help secure the head and gasket?
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Jgranat
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Joined: 25 Mar 2019
Location: NW PA
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Posted: 23 May 2023 at 9:12pm |
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Yep, be concerned about coolant leakage, some rusty crud could be lodged in there now and it may leak. The upside is, the head is off, simply drain your oil and move that pan aside, fill your block with water and see if it leaks. I bet it seals back up though.
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WF owner
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Joined: 12 May 2013
Location: Bombay NY
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Posted: 24 May 2023 at 3:04am |
Personally, at the very least, I would remove the sleeve, clean both the outside of the sleeve and the block seating areas (the top of the block and the area where the O rings go). When you have the piston/sleeve out, check to make sure the rings are not stuck in the piston grooves. Install new O rings on the outside of the sleeve and put it back together. I would definitely use some sealant on the head gasket. I use Hylomar. Some use other products. If you use nothing, expect leaks.
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Steve in NJ
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Joined: 12 Sep 2009
Location: Andover, NJ
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Posted: 25 May 2023 at 8:11pm |
To me expecting that particular cylinder not to leak would be a miracle. Usually, once a sleeve comes up, it's time to pull it out and clean it up like Curt mentioned. Once you disturbed everything down below, it's a sure thing it'll leak. The engine is somewhat apart, fix it right and the Gremlins won't come out.....
Steve@B&B
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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Shane1304
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Location: Ohio
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Posted: 30 May 2023 at 11:48am |
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Thank you for everyone’s response. I shifted focus on to the pedestal while I made an informed decision on the sleeves. I decided you are all correct that it is likely inevitable that cylinder will leak. I’ll remove the sleeve either this week or weekend.
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steve(ill)
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Location: illinois
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Posted: 30 May 2023 at 12:15pm |
shane, the cylinder is a tube with an o-ring grove or two at the bottom. You should replace the o-rings and wire brush the bore and the liner OD. There is a lip at the top that you saw when the liner came up. Wire brush around that and the seat in the block. The liner should stickup a few thousandths when installed so the head gasket will be compressed.. To check the liner, you normally drop it in the bock without the o-rings.. see that it sets to right depth and that you can rotate it in the lower fit... If all is well, remove and install the o-rings and reinstall... Use dish soap or vasaline, or what ever your preferred lube is.
When you pull that liner out and see all the CRUD buildup inside the bock and on the liner... you might change your mind and pull all 4 of them to clean out..  |
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Like them all, but love the "B"s.
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WF owner
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Location: Bombay NY
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Posted: 30 May 2023 at 2:03pm |
 Shane1304 wrote:
Thank you for everyone’s response. I shifted focus on to the pedestal while I made an informed decision on the sleeves. I decided you are all correct that it is likely inevitable that cylinder will leak. I’ll remove the sleeve either this week or weekend. |
I think, long term, you will be much happier. If you had enough water exposure to stick the engine, chances are very good that the rings are rusted to the piston. If they are the engine will be low on compression in that cylinder and probably use oil and have excessive smoke.
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