Crankcase Question

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Model T Ford Forum: Forum 2012: Crankcase Question
Top of pagePrevious messageNext messageBottom of page Link to this message  By David R Barker on Monday, December 31, 2012 - 10:46 am:

Can anyone tell me what the large round hole is in the crankcase? This is located in front of the dip pan, just about in-line with where the large timing gear would be. Please see the photo. Thanks!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Tomaso - Milton,WA on Monday, December 31, 2012 - 10:50 am:

Oil drain.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Nicholas Lingg - Tarboro, NC on Monday, December 31, 2012 - 10:51 am:

It's to remove the crank pin


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Tomaso - Milton,WA on Monday, December 31, 2012 - 10:52 am:

Also used to facilitate in removing fan driven pulley pin.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Walker, NW AR on Monday, December 31, 2012 - 10:54 am:

You're both right. It was put there to remove the crank pulley pin, but it also serves as an oil drain on most T's. :-)


Top of pagePrevious messageNext messageBottom of page Link to this message  By David R Barker on Monday, December 31, 2012 - 11:08 am:

Thanks. I might need a part number for the plug also...


Top of pagePrevious messageNext messageBottom of page Link to this message  By Richard Wolf on Monday, December 31, 2012 - 11:11 am:

There's no plug.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David R Barker on Monday, December 31, 2012 - 11:15 am:

If there's no plug, what goes in the hole?


Top of pagePrevious messageNext messageBottom of page Link to this message  By John Semprez-Templeton, CA on Monday, December 31, 2012 - 11:16 am:

Wine bottle cork, if you think you need a plug.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ken Todd on Monday, December 31, 2012 - 11:25 am:

If you plug the hole, the oil that seeps out of the front "seal" can't drip out.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Monday, December 31, 2012 - 11:28 am:

It's just a drain hole. Also a hole to drain any water that may splash or drip there.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David R Barker on Monday, December 31, 2012 - 11:30 am:

So the hole should be left unplugged so that oil can leak out, as it should? Am I missing something? I'm relatively new here, and I understand there's no oil pressure, but this doesn't make sense to me yet. Thanks for your patience; I'm trying to learn.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Nicholas Lingg - Tarboro, NC on Monday, December 31, 2012 - 11:36 am:

The hole is there so you drive the down thought the hole or put your punch in the hole and drive the pin up.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ricks - Surf City on Monday, December 31, 2012 - 11:37 am:

Lightening.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Garrison_Rice Minnesota on Monday, December 31, 2012 - 11:37 am:

All T's seep a little oil out of the timer/camshaft seal and the front crankshaft seal. I shouldn't say all but with the felt seals it's a common phenomenon. And sometimes you might spill oil or coolant.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Garrison_Rice Minnesota on Monday, December 31, 2012 - 11:39 am:

Mostly the hole is to aid in getting the pin out of the front crankshaft pulley.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David R Barker on Monday, December 31, 2012 - 11:39 am:

Ok, so the oil level in the crankcase will not be high enough to flow into the front of the pan and leak out the hole, even going down a steep grade< Either that, or there's a baffle in the pan that keeps the oil from moving forward on grades? Don't have the pan with me, so I can't check it. Thanks again.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ricks - Surf City on Monday, December 31, 2012 - 11:41 am:

Another example of lightening holes:



Hank Becker's Long Beach Model T Hillclimb car.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Charlie B actually in Toms River N.J. on Monday, December 31, 2012 - 11:41 am:

Magnetize a small juice can and pop it onto the hole from below. When it's full pour it back into the motor. In the immortal words of Foghorn Leghorn: " Thas' a joke, I say thas' a joke son".


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jem Bowkett on Monday, December 31, 2012 - 12:46 pm:

Reading David's queries, I think he is under the illusion that the hole is within the crankcase area, thinking it is below the timing gear. It's well in front of the timing gear, out in front of the front crank oil seal. Open to fresh air both top and bottom.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert Scott Owens on Monday, December 31, 2012 - 12:56 pm:

Say David, I see that you have a case of Quaker State oil. Dont you like good oil? Scott


Top of pagePrevious messageNext messageBottom of page Link to this message  By charles kenneth gibbard. on Monday, December 31, 2012 - 01:26 pm:

That is a verry rare factory raceing pan,
Worth a lot of money.
Kenny.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Norman T. Kling on Monday, December 31, 2012 - 02:08 pm:

Also drain for coolant which leaks front of head gasket or water outlet or upper hose :-) If you don't have any leaks fine! There shouldn't be any leaks anyway! but you all know Model T's! :-)
Norm


Top of pagePrevious messageNext messageBottom of page Link to this message  By David R Barker on Monday, December 31, 2012 - 02:44 pm:

Thanks for all the info. As I said, I'm new so I appreciate the education.

Robert - That's actually a 30+ year old box of QS oil. My dad bought it by the case.

Kenny - I wasn't aware that the pan was anything other than stock. How can you tell the difference?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Thode Chehalis Washington on Monday, December 31, 2012 - 03:05 pm:

David,
Looking at the other side of the pan, is there a dam on the back side of that hole? If not there should be. The hole is on the dry side or front side of the dam/engine front main seal.

Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By David R Barker on Monday, December 31, 2012 - 05:12 pm:

Thanks, Jim. I don't have the pan with me to check; it's with my brother in central NY and I'm in Dayton, OH. I'm sure the dam is there. Kenny said it was a "factory racing pan"? How can you tell this one from stock?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Norman Miller on Monday, December 31, 2012 - 05:16 pm:

I put a plastic black spray paint cap under the "HOLE" with two small springs that clip it in place. This catches the oil drops and is easy to remove. No one has ever noticed it yet.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Walker, NW AR on Monday, December 31, 2012 - 05:50 pm:

David -- Kenny was joking about the racing pan.


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