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Let's play: What's leaking from my Bronco?

bostonbronconut

Contributor
Question Asker
Joined
Jul 17, 2018
Messages
176
Loc.
Wayland, MA
I haven't driven my 1977 Bronco in a few days. I went out to the garage just now and saw that there is a new leak coming from the under the hood, driver-side. I can't exactly figure out where/what the source of the leak is but it is relatively new and it isn't a consistent drip.

Thank you for your input!
 

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rmk57

Sr. Member
Joined
Feb 24, 2016
Messages
580
Looks like engine oil or really neglected ATF. Coming from the front pan seal or trans oil cooler line.
 

DirtDonk

Contributor
Bronco Guru
Joined
Nov 3, 2003
Messages
47,645
It's the anti-grav stabilizer fluid leaking! Get that to a star base for service quickly!;D

I wonder if it could be brake fluid? Engine oil seems the most likely, but since it's coating the tubes for the front brakes too, it's hard to say.
With so much stuff right there, you may have to give it a good cleaning then wait for the leak to just start to find the source.

Good luck.

Paul
 

triracer67

Contributor
Sr. Member
Joined
Nov 29, 2010
Messages
608
I can testify to the fact that the more it’s driven, the less it leaks. Take it out for a drive. I’ve driven mine the last ten days, pulled into the garage today, and zero spots.
 
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bostonbronconut

bostonbronconut

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Question Asker
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Jul 17, 2018
Messages
176
Loc.
Wayland, MA
Thank you for the productive feedback. And sorry for the shotty images.

I haven't had a chance to really get under the Bronco to try to find the culprit but I am planning on doing that this evening. I'll follow up with better information if possible.
 
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bostonbronconut

bostonbronconut

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Question Asker
Joined
Jul 17, 2018
Messages
176
Loc.
Wayland, MA
Here is another attempt at getting some good photos to you guys.

I cleaned underneath the Bronco and set a large rubber mat under it to collect any drippings. I found two drops this morning:

1. Driverside, potentially from the oil filter
2. Passenger side, potentially from oil pan

I'll take another look at the mat when I get back from work this evening.
 

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Justafordguy

Contributor
Bronco Guru
Joined
Sep 26, 2009
Messages
6,253
If you're lucky maybe it's just the oil filter and the drain plug gasket.
 

Juiceman

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Full Member
Joined
Sep 19, 2014
Messages
358
I used the foot powder method. Gave everything a good cleaning and then sprayed the white baby/foot powder on the bottom side of the engine. Leaks show up quickly. It does coat everything and remains there, so you want to give it a good power washing afterward to get the white residue off.
 

blubuckaroo

Grease Monkey
Joined
Jun 11, 2007
Messages
11,795
Loc.
Ridgefield WA
Very likely an engine oil leak.
So, lots of suspected sources.
It's best to steam clean it (a real steam cleaner, and not a hot water washer) then watch.
 

blubuckaroo

Grease Monkey
Joined
Jun 11, 2007
Messages
11,795
Loc.
Ridgefield WA
Very likely an engine oil leak.
So, lots of suspected sources.
It's best to steam clean it (a real steam cleaner, and not a hot water washer) then watch.
When you do find the source, reseal all the other suspected areas anyway.
Why?
Because everything is old and ready to leak.
 

blubuckaroo

Grease Monkey
Joined
Jun 11, 2007
Messages
11,795
Loc.
Ridgefield WA
Very likely an engine oil leak.
So, lots of suspected sources.
It's best to steam clean it (a real steam cleaner, and not a hot water washer) then watch.
When you do find the source, reseal all the other suspected areas anyway.
Pan, valve covers, intake manifold, oil pump, timing cover, and seal.
Why?
Because everything is old and ready to leak.
 
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