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Old Jul 3, 2022 | 10:25 AM
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Oil leak

Howdy. Got a 351c here. Has sprung a leak. Image of area below. Where exactly is it leaking from?
 
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Old Jul 3, 2022 | 10:35 AM
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Uhhh, under the truck?

Seriously need better pics.
 
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Old Jul 3, 2022 | 10:43 AM
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Originally Posted by beartracks
Uhhh, under the truck?

Seriously need better pics.
yea I had the feeling that wouldn’t cut it but I’m away from it rn and thought I’d try anyway. It’s coming from that pan looking thing with the cover that is vertical
 
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Old Jul 3, 2022 | 11:38 AM
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White box is back end of oil pan, could be oil pan gasket. Or a rear main seal.
Blue box is flywheel cover plate, it just covers the bottom half of the fly wheel, it is removable.
Red box is front half of transmission. Could be the trans seal.

Is the drip on the bottom of the trans motor oil colored or red transmission fluid colored? Keep a close eye on your fluid levels. Remove the flywheel cover plate, and use some spray brake cleaner to clean all of that area all up. Wipe oil pan, and the bottom of the trans.

Bad thing is one drop oil can carry in the wind and go all over the place. 2wd and low to the ground, time for some metal car ramps or jack stands or BOTH. Worse case drive one side up on a curb.
 
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Old Jul 3, 2022 | 11:43 AM
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I think the oil sending unit is just behind the intake manifold, they go bad and leak, might check that too.
 
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Old Jul 3, 2022 | 11:46 AM
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Good call F5fordgirl, but when that sending unit leaks, it usually comes all down the very back side of the transmission. And the wind from driving carries it even further back. But still a good call, could even be the intake manifold S gaskets. The rear on is just in front of the sending unit.
 
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Old Jul 3, 2022 | 12:08 PM
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Originally Posted by 77&79F250

White box is back end of oil pan, could be oil pan gasket. Or a rear main seal.
Blue box is flywheel cover plate, it just covers the bottom half of the fly wheel, it is removable.
Red box is front half of transmission. Could be the trans seal.

Is the drip on the bottom of the trans motor oil colored or red transmission fluid colored? Keep a close eye on your fluid levels. Remove the flywheel cover plate, and use some spray brake cleaner to clean all of that area all up. Wipe oil pan, and the bottom of the trans.

Bad thing is one drop oil can carry in the wind and go all over the place. 2wd and low to the ground, time for some metal car ramps or jack stands or BOTH. Worse case drive one side up on a curb.
it was oil last time I checked. Trans fluid stays same level. And it’s coming from the blue box you outlined
 
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Old Jul 3, 2022 | 12:18 PM
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Well the blue box is at the bottom of the engine oil area. So I bet oil pan gasket or rear main seal.
 
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Old Jul 3, 2022 | 12:25 PM
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Originally Posted by 77&79F250
Well the blue box is at the bottom of the engine oil area. So I bet oil pan gasket or rear main seal.
also a few more details- leaks most after running at hottest temp (210) and after being on highway. Lost about half a quart after an 80 mile trek on the freeway. Doesn’t lose a lot if just going around town
 
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Old Jul 3, 2022 | 01:24 PM
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Is your PCV system working?
 
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Old Jul 3, 2022 | 01:48 PM
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Originally Posted by 77&79F250
Is your PCV system working?
interestingly enough I just installed a new carburetor and my mechanic eliminated the PCV system altogether and just used these breather plug things in the valve covers
 
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Old Jul 3, 2022 | 03:48 PM
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Yes that is interesting, did you have the leak BEFORE he did that? Remember a drop of oil goes a mile in the undercarriage wind.
 
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Old Jul 3, 2022 | 05:41 PM
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Originally Posted by 77&79F250
Yes that is interesting, did you have the leak BEFORE he did that? Remember a drop of oil goes a mile in the undercarriage wind.
that’s when I noticed it
 
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Old Jul 5, 2022 | 08:33 AM
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You need the pcv system and another mechanic
 
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