Dented oil pan
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Dented oil pan
just completed my header install 74F100 390, went pretty good but had to jack the motor up for the passenger side. Used a block of wood but found out i had dented it a little(really not much at all) when i cranked it up there was a loud knocking sound. got back under the truck and seen the problem
Is there any way to pull the dent without pulling the oil pan?and did it hurt anything for the short time it was running
Is there any way to pull the dent without pulling the oil pan?and did it hurt anything for the short time it was running
Cargo Master
Joined: Apr 2004
Posts: 2,574
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From: Golden, CO
Ouch! It for sure didn't feel good.
If you are sure the knock was internal, oil starvation is likely.
I'm not going down the gloom and doom path without more info. Did you happen to notice the oil pressure gauge? How many minutes, or even seconds was it running?
You might have dodged a bullet, but the only way to know is to start looking for blood. LOL Pull the dizzy and pre-lube the engine. It's an easy way to check for oil pressure without spinning the crank. I would be dropping the pan if oil starvation was a real possibility.
If you are sure the knock was internal, oil starvation is likely.
I'm not going down the gloom and doom path without more info. Did you happen to notice the oil pressure gauge? How many minutes, or even seconds was it running?
You might have dodged a bullet, but the only way to know is to start looking for blood. LOL Pull the dizzy and pre-lube the engine. It's an easy way to check for oil pressure without spinning the crank. I would be dropping the pan if oil starvation was a real possibility.
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oil starvation isnt the problem it was running like a top when i started the header install and jacked the motor up yes i even used a block of wood but it still creased it some. i figure the crank must be tapping on the pan.wasnt even running 1 minute the crease in the pan is at the back near flywheel.. somebody out there must have done this before
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Joined: Jul 2002
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From: Long Island USA
Is it knocking, or does it sound like the crank is hitting the pan ?
Where did you crease it? In the sump, or up on the flat part above the sump?
If it's in the bottom of the sump, you pushed the pan against the oil pickup.
If it's the flat upper portion of the pan, away from the sump, the crank is hitting the pan.
But no, I know of no way to pull the dent without taking the pan off.
Unless you can get a slide hammer in there, and then weld the hole shut (or put a screw in it - which might hit the crank again).
Where did you crease it? In the sump, or up on the flat part above the sump?
If it's in the bottom of the sump, you pushed the pan against the oil pickup.
If it's the flat upper portion of the pan, away from the sump, the crank is hitting the pan.
But no, I know of no way to pull the dent without taking the pan off.
Unless you can get a slide hammer in there, and then weld the hole shut (or put a screw in it - which might hit the crank again).
Logistics Pro
Joined: Oct 2005
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From: Mddl A MexCans
oil starvation isnt the problem it was running like a top when i started the header install and jacked the motor up yes i even used a block of wood but it still creased it some. i figure the crank must be tapping on the pan.wasnt even running 1 minute the crease in the pan is at the back near flywheel.. somebody out there must have done this before
As to a dent at the rear of the pan, probably just have to live with it till you need a new gasket
Elder User
Joined: May 2004
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From: saxton pa.
Pan Dent
You can repair a dented pan by welding a nut to the pan and scewing a bolt in and using this for a pulling anchor. The shallow part of a FE pan is very close to the crank , you should never jack the engine there. 
Have A Good Day -----Hotwrench
Have A Good Day -----Hotwrench
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yes the crease is in the shallow part, thought about lowering the pan some and using extra gaskets?I am concerned about the damage if any when the crank was tapping the pan?
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Elder User
Joined: May 2004
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From: saxton pa.
Pan Dent
If you didn't run the engine very long you shouldn't have a problem. If you are going to install an extra gasket you may as well pound out the crease in your oil pan. Then you won't need the extra gasket.
Have A Good Day----Hotwrench
Have A Good Day----Hotwrench
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Needsmorecoffee.
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From: CT
I'd think the crank is more than likely fine. I think Hotwrench has the best idea short of removing the pan. While most oilpans can hold the weight of the engine while sitting on the ground.... not many oilpans can hold the weight of the truck. I'd be concerned more with the pan possibly being hairline cracked besides being dented. Hopefully not the case but I'd keep a close eye on it for weeping. But if it's not cracked the welded nut and slide hammer just might do the trick!
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Thanks for all the help, i will rent a slide hammer and try it with the nut.It finally stop raining so i went out with a straight edge and measured the crease 1/4" must only be a 1/8 clearance between crank and pan. cant wait to get her out with the headers installed(never will understand the stock manifold design)
Elder User
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From: saxton pa.
Pan Dent
If you don't want to rent a slide hammer just use a large link chain and bolt it to the pan then you can use a pry bar against the crossmember or axle and pry down-- thus pulling the dent. Years ago we installed a 390 in a pickup didn't know about the dented pan - this is how we fixed it.
Just Some Thoughts----Hotwrench
Just Some Thoughts----Hotwrench
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
If that won't work, you might try the next size up, the "plumbers friend."
Cargo Master
Joined: Apr 2004
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From: Golden, CO
Good luck with that!
The last ime I tried to weld an oil pan while it was still on the vehicle, it made me cry. Then I had to do the removal twice because the replacement was free if I dropped it myself. That chore wasn't quite as easy, it wasn't an old Ford truck.
If you decide to drop the pan, here is some food for thought:
Note: I J-B'd the thing on the pan. So far, so good.
Pictures would be awesome!
The last ime I tried to weld an oil pan while it was still on the vehicle, it made me cry. Then I had to do the removal twice because the replacement was free if I dropped it myself. That chore wasn't quite as easy, it wasn't an old Ford truck.
If you decide to drop the pan, here is some food for thought:
Note: I J-B'd the thing on the pan. So far, so good.
Pictures would be awesome!