 Help me find my oil leak! |
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| bkrantz |
 Jan 10 2023, 07:46 PM
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#41
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914 Guru  Group: Members Posts: 8,436 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains 
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QUOTE(930cabman @ Jan 10 2023, 11:26 AM)  QUOTE(bkrantz @ Jan 9 2023, 09:25 PM) Here's the cover off. No dramatic scoring. Also no gasket. I am trying to remember if I did this on purpose. Stupid #2? No gasket, but it does appear some residue of a sealer. When she was running how was the oil pressure, cold and hot? What pump is this? As best as I recall, I used a thin skim of case sealer (Loctite 574). The pump is a 26mm Shaded, modified (from Aircooled.net). I only have a oil pressure warning light (something I plan to correct while the engine is out). All I can say is that the light went off quickly after both cold and hot starts, and never came on at idle. Attached thumbnail(s) 
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| r_towle |
Jan 10 2023, 07:54 PM
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#42
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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Is there a slot in the body and cover for an o-ring on the pump?
Loose oil filter will spray oil everywhere… |
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| bkrantz |
Jan 11 2023, 08:22 PM
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#43
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914 Guru Group: Members Posts: 8,436 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains
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QUOTE(r_towle @ Jan 10 2023, 06:54 PM) Is there a slot in the body and cover for an o-ring on the pump? Loose oil filter will spray oil everywhere… No, the cover has a flat surface. I sure hope the leak was my pure stupidity, first in not tightening the filter, and then in not checking it before I dropped the engine. |
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| nathanxnathan |
Jan 11 2023, 11:44 PM
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#44
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Member Group: Members Posts: 294 Joined: 16-February 18 From: Laguna Beach, CA Member No.: 21,899 Region Association: Southern California |
The fan tends to suck in and redistribute oil all over that side of the motor. Most of my experience is with type 4 powered buses where the fan is at the back, but I think the power of the fan is more intense than any air flowing by. The most common leaks are pushrod tube seals. You wouldn't think that oil all dripping from the area of the bottom of the fan would be from there but my experience with ultra violet dye says that's where it comes from most of the time.
People will argue that viton seal will work dry, but that hasn't ever worked for me. The best thing I've found is a bit of ultra black silicone on them, but even with that, it's only a matter of a few months and it starts to leak again. |
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| bkrantz |
Jan 14 2023, 09:26 PM
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#45
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914 Guru Group: Members Posts: 8,436 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains
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Thanks, everyone. Going back to my build thread.
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