Need advice -- oil galley plug, What to seal with? |
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Need advice -- oil galley plug, What to seal with? |
BillC |
Jan 28 2024, 11:12 AM
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#1
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Senior Member Group: Members Posts: 546 Joined: 24-April 15 From: Silver Spring, MD Member No.: 18,667 Region Association: MidAtlantic Region |
I think I found the oil leak on the bottom of my engine. When they rebuilt it, they installed screw-in oil galley plugs. This one, on the front of the engine, appears to be the leak -- it was a little loose and there was oil all over the back of the motor mount bracket.
The plug is 22mm with 1.5mm thread, straight thread (no taper), and is fairly short. It looks like they might have used a very small amount of gasket shellac to seal it originally. They did stake the plug, and it didn't rotate, but it unscrewed very easily and turned-in just a little past the stake when I tried putting it back in. What should I use to seal this plug? I'm guessing pipe dope isn't the right stuff, since the plug isn't tapered. More gasket shellac? Red loctite? Something else? Thanks! |
DennisV |
Jan 28 2024, 12:13 PM
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#2
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Member Group: Members Posts: 484 Joined: 8-August 20 From: Santa Rosa, CA Member No.: 24,575 Region Association: Northern California |
I think I found the oil leak on the bottom of my engine. When they rebuilt it, they installed screw-in oil galley plugs. This one, on the front of the engine, appears to be the leak -- it was a little loose and there was oil all over the back of the motor mount bracket. The plug is 22mm with 1.5mm thread, straight thread (no taper), and is fairly short. It looks like they might have used a very small amount of gasket shellac to seal it originally. They did stake the plug, and it didn't rotate, but it unscrewed very easily and turned-in just a little past the stake when I tried putting it back in. What should I use to seal this plug? I'm guessing pipe dope isn't the right stuff, since the plug isn't tapered. More gasket shellac? Red loctite? Something else? Thanks! If remove and reinstall is an option, perhaps Loctite 574. A Porsche trained mechanic uses it for not just case sealant but some plugs like the one in the end of the intermediate shaft. BTW - This is a good read on various case sealants. If you're looking for something to apply to the exterior, Wayne Dempsey's engine building book recommends JB Weld in places where Porsche used epoxy (i.e., freeze plugs on 911 engines). Not sure about 914. |
BillC |
Jan 28 2024, 12:23 PM
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#3
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Senior Member Group: Members Posts: 546 Joined: 24-April 15 From: Silver Spring, MD Member No.: 18,667 Region Association: MidAtlantic Region |
If remove and reinstall is an option, perhaps Loctite 574. A Porsche trained mechanic uses it for not just case sealant but some plugs like the one in the end of the intermediate shaft. BTW - This is a good read on various case sealants. If you're looking for something to apply to the exterior, Wayne Dempsey's engine building book recommends JB Weld in places where Porsche used epoxy (i.e., freeze plugs on 911 engines). Not sure about 914. I have already removed the plug and cleaned up it and the hole. I am ready to reinstall the plug, but not sure what to seal it with. I don't like the idea of epoxy, since I may want to get it out at some point. |
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