Oil pan leak rear of engine

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jfkelley

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Apr 14, 2019
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Location
Oklahoma City
First Name
John
Truck Year
1976
Truck Model
K10
Engine Size
350
:emotions122:
I have an 1977 K10 4X4 with an 2003 lm7 / 4l60e/NP241C ...I have a leak on the driver side oil pan the very last bolt ...The weird thing is it only leaks when I turn the truck off ..While its running no leak on the ground ..I changed the cam sensor thinking it was truly the culprit..SURPRISE!!! I was wrong :angry1: ...It doesn't leak anywhere else but from that very last bolt ...I have used mirrors ,dye and still cant locate the leak .. I was going to to drop the pan maybe put some silicone on the corner ...Honestly it could be coming from the barbell, rear cover or rear main seal when I changed all the gaskets i may have not aligned everything right .. I assume its coming from the top and running along the inside and dripping from that bolt for all I know .I can put my finger into the bottom of transmission cover and there is oil there as well ..I was hoping I could get some insight from some of you more experienced gentlemen...Thanks in advance ..

I do recall putting the black silicone on all four corners of the pan ..But then again i second guess myself If i used enough ...
 
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Wallace6

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Location
Wyoming
First Name
Ray
Truck Year
1987
Truck Model
Suburban
Engine Size
350
Are you sure you don't have a valve cover leak?
 

Dmack

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Location
Central OR
First Name
Dave
Truck Year
1983
Truck Model
K20
Engine Size
350
Mine had a horrendous leak at the oil pressure sending unit near the distributor when I got it. Ruined the clutch disc.
 

jfkelley

Full Access Member
Joined
Apr 14, 2019
Posts
65
Reaction score
15
Location
Oklahoma City
First Name
John
Truck Year
1976
Truck Model
K10
Engine Size
350
Mine had a horrendous leak at the oil pressure sending unit near the distributor when I got it. Ruined the clutch disc.
Replaced the oil Sending unit ..That’s when I noticed it only leaked after I shut the engine off
 

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