External front crankshaft seal
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Topic author - Posts: 94
- Joined: Tue Dec 27, 2022 10:12 pm
- First Name: Harvey
- Last Name: Bergstrom
- * REQUIRED* Type and Year of Model Ts owned: 1924 Touring
- Location: Cayuga ND
- MTFCA Number: 52256
External front crankshaft seal
I am working on my 24 Touring and having done a rebuild on engine with a neoprene crank seal, I still see a drip under the front of engine. So I thought to add an additional external seal and want to know if anyone else has done this using an aluminum belt pulley and your technique in doing this. Your thoughts are appreciated!
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- Posts: 6431
- Joined: Sun Jan 06, 2019 11:18 am
- First Name: Scott
- Last Name: Conger
- * REQUIRED* Type and Year of Model Ts owned: '13, '15, '19, '23
- Location: Clark, WY
- Board Member Since: 2005
Re: External front crankshaft seal
Personally, I wouldn't worry about it...
The problem with adding an additional seal is that a seal must run with lubricant (that it is retaining). A dry seal will just burn up and be destroyed. From your description, not enough lubricant is making it past your seal to lubricate an additional seal applied on the outside.
T's leak
despite the most super-human attempts otherwise
The problem with adding an additional seal is that a seal must run with lubricant (that it is retaining). A dry seal will just burn up and be destroyed. From your description, not enough lubricant is making it past your seal to lubricate an additional seal applied on the outside.
T's leak
despite the most super-human attempts otherwise
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
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- Posts: 1436
- Joined: Tue Jan 08, 2019 12:22 am
- First Name: craig
- Last Name: leach
- * REQUIRED* Type and Year of Model Ts owned: 1919 Firetruck/1922 Speedster
- Location: Laveen Az
- MTFCA Number: 26647
Re: External front crankshaft seal
Hi Harvey,
I have gone to installing a outside seal every time I have a engine apart. The seal I use is a National 471766 because most auto parts
stores have them in stock and they are a relatively thin single lip seal ( so it is shorter ) and they are $6. I cut the outer flange off of
the metal part of the seal so it is even shorter. Clean the pan & timing cover with brake or carb cleaner and silicone it on backwards.
You will probably have to put the pulley in the lathe and remove a little bit from the backside to clear the seal ( I have not had to do
that on steel pulleys ) I like to use the Great Stuff product for this because it can be purchased in a 5 min. cure time but if you use
regular silicone let it sit for 24 hours. I have had good luck with this when a seal ( felt ) failed and oil was running out ( this was
not intended to be a permanent repair) but it did last until the engine was rebuilt years later.
Craig.
Pilot wrote up on maintenance request sheet that engine #2 was leaking oil. Flight mechanic wrote some leakage is needed for proper
lubrication. The next flight the pilot wrote up engines #1, #3 & #4 are not lubricating properly.
I have gone to installing a outside seal every time I have a engine apart. The seal I use is a National 471766 because most auto parts
stores have them in stock and they are a relatively thin single lip seal ( so it is shorter ) and they are $6. I cut the outer flange off of
the metal part of the seal so it is even shorter. Clean the pan & timing cover with brake or carb cleaner and silicone it on backwards.
You will probably have to put the pulley in the lathe and remove a little bit from the backside to clear the seal ( I have not had to do
that on steel pulleys ) I like to use the Great Stuff product for this because it can be purchased in a 5 min. cure time but if you use
regular silicone let it sit for 24 hours. I have had good luck with this when a seal ( felt ) failed and oil was running out ( this was
not intended to be a permanent repair) but it did last until the engine was rebuilt years later.
Craig.
Pilot wrote up on maintenance request sheet that engine #2 was leaking oil. Flight mechanic wrote some leakage is needed for proper
lubrication. The next flight the pilot wrote up engines #1, #3 & #4 are not lubricating properly.
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- Posts: 3840
- Joined: Fri Feb 12, 2021 12:24 pm
- First Name: john
- Last Name: karvaly
- * REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
- Location: orange, ca
- MTFCA Number: 14383
- Board Member Since: 2020
Re: External front crankshaft seal
The aluminum pulley may need some extra machining on the rear for extra seal clearance.
I have encountered this clearance problem. The original steel pulley has a recessed curved back that gives the needed clearance.
I have encountered this clearance problem. The original steel pulley has a recessed curved back that gives the needed clearance.
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- Posts: 600
- Joined: Wed Jan 23, 2019 3:00 pm
- First Name: Gene
- Last Name: Carrothers
- * REQUIRED* Type and Year of Model Ts owned: 1912 Torpedo Roadster
- Location: Huntington Beach, Ca
- MTFCA Number: 22905
- MTFCI Number: 23068
- Board Member Since: 1999
Re: External front crankshaft seal
I would never install an engine or radiator without adding a modern oil seal to the outside of the crankshaft! The problem with a small oil drip at the front of the engine is that if you drive your car much that little drip blows back underneath and covers Everything and sooner or later you have a real mess. Montana 500 winner Garrett Green told me about his idea. You do have to install the seal backwards with the lip facing the front and I use Ultra Black or the Right Stuff. Speedy John found some seals that were very thin and most always would have enough clearance. I like one with a large outer diameter. I usually cut stripes in the flange and flatten it out like a daisy flower pedals. Just make sure the surface is clean and you have prefit the seal up nice and tight to the block.
Don't have any problem with wear I guess because just enough oil wicks thru the felt to keep the neoprene happy.
Don't have any problem with wear I guess because just enough oil wicks thru the felt to keep the neoprene happy.
1912 Torpedo Roadster