Leak
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5th Wheeling
Joined: Feb 2023
Posts: 45
Likes: 4
Leak
It appears I have an engine leak on my 1975 f250. It is pretty slow but is soaking everything, such as the manual transmission, with oil. I notice it appears to be coming from the location in the image near the headers. What do you guys think. It realy has no smell except for where it comes off the transmission, so maybe I have another leak? Or the oil from the engine is just dripping and coating everything? Thanks for any advice!
More Turbo
Joined: Jun 2015
Posts: 588
Likes: 113
From: New Hampshire
I'm betting on 5851a's prognosis of leaking oil at the back of the intake manifold
Get yourself some UV dye from Amazon or whatever your favorite parts store is, pour it in the oil, run it for about 30 minute and then hit those wet spots with a black light .
Follow the oil trail up from the lowest spot and you'll be amazed at how far that oil leak can travel.....
Tbruz
Get yourself some UV dye from Amazon or whatever your favorite parts store is, pour it in the oil, run it for about 30 minute and then hit those wet spots with a black light .
Follow the oil trail up from the lowest spot and you'll be amazed at how far that oil leak can travel.....
Tbruz
Thread Starter
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5th Wheeling
Joined: Feb 2023
Posts: 45
Likes: 4
I'm betting on 5851a's prognosis of leaking oil at the back of the intake manifold
Get yourself some UV dye from Amazon or whatever your favorite parts store is, pour it in the oil, run it for about 30 minute and then hit those wet spots with a black light .
Follow the oil trail up from the lowest spot and you'll be amazed at how far that oil leak can travel.....
Tbruz
Get yourself some UV dye from Amazon or whatever your favorite parts store is, pour it in the oil, run it for about 30 minute and then hit those wet spots with a black light .
Follow the oil trail up from the lowest spot and you'll be amazed at how far that oil leak can travel.....
Tbruz
Lead Driver
Joined: Jun 2006
Posts: 5,676
Likes: 996
From: Near Yosemite CA
Hard to say without actually seeing it, but probably time for new valve cover gaskets, can't tell, but does it have a greenish color to it, or is that just the lighting..? I would lean towards the valve cover gaskets as they always get over-tightened then start leaking.
Thread Starter
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5th Wheeling
Joined: Feb 2023
Posts: 45
Likes: 4
Hard to say without actually seeing it, but probably time for new valve cover gaskets, can't tell, but does it have a greenish color to it, or is that just the lighting..? I would lean towards the valve cover gaskets as they always get over-tightened then start leaking.
no, it’s not green. Must be the lighting. It’s dripping down onto the transmission and bell housing
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,243
Likes: 5,811
From: S/W Missouri, Polk county
If you are lucky it is just a oil pressure sending unit leaking. But....X2 looks like the intake manifold back "china" wall gasket has left the chat. And or YES you might need to replace the valve cover gaskets also.
Use a liberal amount of spray brake cleaner (with a cooled down engine) and clean the entire area up behind the intake, around the back of the block and on the top front area of the transmission REAL well. I mean like you are going to drop a cheese burger on it, to heck with the 3 sec rule and pick it up and eat it clean.
Take the truck for a very short drive and see if you have a sign of a fresh leak. With a oil leak and a little bit of going down the highway wind, the oil can go everywhere.
Use a liberal amount of spray brake cleaner (with a cooled down engine) and clean the entire area up behind the intake, around the back of the block and on the top front area of the transmission REAL well. I mean like you are going to drop a cheese burger on it, to heck with the 3 sec rule and pick it up and eat it clean.
Take the truck for a very short drive and see if you have a sign of a fresh leak. With a oil leak and a little bit of going down the highway wind, the oil can go everywhere.
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