Oil leaks after rebuild, Dropping motor to track down oil leaks Options

[Wew]

Hi all,

Engine rebuild has not gone as smooth as I had hoped.

I am dropping the engine again to figure out the source of my leaks.

I have drips coming from a couple of the tube on the passenger side under the oil cooler.

Tough to tell if it's the cooler or the tubes.

Cylinder 3 is giving me the most concern.

It almost looks like one of the four cylinder studs is leaking oil.

I can't tell exactly as it could be the actual mating surface of the cylinder and the block.

Anyway I am dropping the motor to track these down.

Has anyone else come across oil leaking out of a stud or is this just the cylinder and engine mating surface leaking?

If it is how have any of you remedied this?

Is there a bullet proof sealant that others have used to stop this?

Attached is an image I borrowed online that shows the location of where I see oil coming from.

Thanks for sharing as always.

[Wew]

Hi all,

Sorry for the absence. Been away on vacation.

I took the engine to a very reputable engine builder machine shop (RPM in Rohnert Park CA) that does a lot of the high end dyno testing and race engine building.
They gave it a look and said they could fix it.

Since the threads didn't go all the way down in the opening the first solution by one of the machinists was let's just tap this thing a little deeper with the original thread pitch and size so the we can rotate and set the male end deeper.
He did that with lots of grease and then vacuumed up whatever shaving were made.
Then he screwed in the original and it set in much deeper.
7 inch lbs of torque was his recommendation for the sender.

He recommended using a permatex high temperature thread sealant, says they use that on all of their high performance engines. Most of the cars they work on are american muscle cars.

If it doesn't work bring it back up and they will get more aggressive with solution.
He didn't charge me a penny for his work. Pretty awesome.

I am going to build an engine stand to test the motor this time rather than going to all the trouble of installing the engine just to find out I missed something.

I know my pace and with full time work I doubt I will have the engine start stand build and the engine on it for testing by this weekend. Hoping to have it done before end of May.

Keeping my fingers crossed.

Gary