Mystery Hole in Block

[Bingster]

There is a good size threaded hole on my block just under the oil filter piping. The filter is already plumbed and I had put tape over the hole to prevent dirt getting in there, but I can't remember what I took out of there.

 

 

[rallyace]

Can you post a picture of the hole. It would make it a lot easier for us to understand the situation.

[soth122003]

Oil pressure gage or Temp gage?

 

Joe Lee

[Jerry Roberts]

Oil pressure relief valve ?

[TodFitch]

How big a hole and what year the block?

 

On the 33 & 34 blocks there is a large threaded hole where the mount/pivot stud for the automatic clutch.

[Bingster]

I snap a photo of it.

[Bingster]

I cannot resize a photo small enough.

[lostviking]

What car/truck, what engine?

[Bingster]

1947 DeSoto Flathead 6.

[DonaldSmith]

Here's a photo of the side of my 47 DeSoto engine from when I recently removed the oil filter housing.  It might show the hole that Bingser is talking about.   

 

Side of head:  Bolt at coil attachement - 2 bolts at oil filter bracket - Temperature probe.

 

At welch plug - bolts, 1 at 7:00, one at 1:00 with ground strap to the body. 

 

Bottom of block:  cluster of oil line holes. (Not sure what each one is for.)

Vertical tube to oil pressure gauge (future tee to supply oil filter).  

Angled opening below the solenoid (future return line from the oil filter). 

 

Edited October 11, 2023 by DonaldSmith
Bisspelled Bingster

[Bingster]

On my block the hole is to the left of your vertical tube to the oil pressure gauge, nestled up to the rear of the larger casting that is directly under the oil pressure tube connection. 

 

 

 

[DonaldSmith]

In my photo, I have a wad of paper towel in that hole.  That's where the dipstick tube screws in.   Where's your dipstick?

 

Here's my dipstick tube.

 

Edited October 12, 2023 by DonaldSmith
Added photo

[Bingster]

Oh, that makes great sense now.  Embarrassed to say that I don't know right now where the dipstick tube is. I had to have it cause I changed my oil a couple years ago. But I'll go out and look. Thanks.