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drain plug drip
#1

So, I've been messing with trying to get the drain plug to stop leaking for a few years, I'm out of ideas. 

I've done the aluminum washer, copper washer, aluminum with rubber bonded to it, and as of now, a new drain plug with built in o-ring. 
https://www.mymoparparts.com/oem-parts/m...-6507741aa

I've put a tug on it, tightened when hot, tighten when warm, tighten when cold, winter, summer, new oil, old oil. 
Last week before changing it to the new plug, it was so tight I was afraid it would bend the pan or pull the threads out, it did neither, but I don't think it should be this difficult to get it to seal. 

This is the last leak that I am trying to get handled on this car, but it's not going down without a fight. 

Any ideas?
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#2

(05-19-2021, 08:11 PM)my8950 Wrote:  Any ideas?


Yep.......you've got a crack in the pan at/near the threaded drain hole. That's the only thing that could possibly cause a persistent leak after all the valid solutions that you've tried!  <shrug>
Placerville, California
(former)  '78 2.3T Courier w/blow-thru Autolite 2bbl carb ~ (current)  '87 2.3T Ranger w/PiMP’d EFI
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#3

(05-19-2021, 09:21 PM)TurboRay Wrote:  
(05-19-2021, 08:11 PM)my8950 Wrote:  Any ideas?


Yep.......you've got a crack in the cast aluminum pan at/near the threaded drain hole. That's the only thing that could possibly cause a persistent leak after all the valid solutions that you've tried!  <shrug>

Steel pan, but I could check it with a magnifying glass. Maybe I'll dump it again and take a look. 
I guess if I know then at least I know and can quit trying to fix it.
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#4

(05-19-2021, 11:59 PM)my8950 Wrote:  Steel pan......... 
 
LOL......I edited my post! The leak has gotta be caused by a crack or pinhole at/near the drain hole! If something were wrong with the plug or its' gasket......one (or ALL)  of the "fixes" you implemented woulda worked.  <shrug>
Placerville, California
(former)  '78 2.3T Courier w/blow-thru Autolite 2bbl carb ~ (current)  '87 2.3T Ranger w/PiMP’d EFI
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#5

Do you have an oil level sensor right above the oil drain ?
87 TC 5 speed at 205,000 miles, BoPort Stage 3 Head, 2.1 cam, 50 trim Turbo, Stinger Pimp, 3" exhaust, upper and lower ported manifolds, FMIC, 80lb injectors, 255 pump, 20 psi at 4K, 25 psi at 4.5k. Temp is 93c and IAT is 50c in West Texas Summer. Great freeway flyer on pump 93 gas.
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#6

(05-20-2021, 10:52 PM)Racingjake Wrote:  Do you have an oil level sensor right above the oil drain ?

Nope, just drain plug. I believe there is a large plug also where the level sensor may go, but no actual sensor. 
No leak from that, it's specifically coming from the drain plug or threads.
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