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83 Targa
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Flywheel seal installed dry or OD with sealant like Curil T?
Dropping the '83 3.0 engine (again) due to a flywheel seal leak and I would like to know if it is best done without a sealant on the OD or perhaps with a very thin application of Curil T? I used a thin application of Curil T just recently on the same seal, and it seemed to make the seal press in with too much resistance.
![]() I did not like the way that last seal went in and I should have started over without this second engine drop. http://forums.pelicanparts.com/support/smileys/paddel.gif[/img] I have 2 seals on hand this time. Thanks in advance for all the guidance and help. ![]() Bill ![]() |
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You'll find many opinions on this because it's a personal choice. I never use anything on the outside of a crankshaft seal I put a little oil on the inside running surface. The most important thing is to use the proper installation tool. There's a guy on this board who rents a seal installer for $20.00.
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1974 sahara beige 911 targa 1982 chiffon 911sc 1985 prussian blue metallic carrera |
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Vaccinated and Boosted
Join Date: Mar 2007
Location: Ohio
Posts: 1,586
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I used a small amount of Curil on the OD and small amount of grease on the ID. I do have the proper tool for installation if you need it.
mg
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2013 911 Turbo S 2025 Lexus TX350, 2024 Honda CRV Hybrid 1930 Cadillac V8, 1991 Ford F250, 2023 Chevy Colorado And some garage space.... |
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,432
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dry. curil t never dries and you need a decent grip between seal and case so the seal doesn't get pushed out.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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Registered
Join Date: Apr 2010
Location: New Orleans, LA
Posts: 1,493
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if you don't have the "proper tool" a $2 PVC pipe from home depot works fine. someone posted the correct diameter which can be found in a search.
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1982 911SC, Mocal oil cooler, Bilsteins, Carrera tensioners, backdated heat, factory short shift, Seine gate shift, turbo tie rods, pop off. 2005 Mercedes-Benz C230 kompressor sport 6-speed (daily driver) |
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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Quote:
I just wet the seal with some water to help the seal slip into place, to avoid tearing the seal's rubber covering if it gets slightly hung up on the case bore going in.
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Kevin L '86 Carrera "Larry" |
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Join Date: Dec 2012
Location: Motor City area
Posts: 617
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Well; time will tell if my method worked, but I lubed the seal with a little bit of motor oil on the install: using the 2in dia PVC pipe and my hickory mallet.
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'The forever project car - 1979 911SC targa - getting it running right was a task, read about it here: http://forums.pelicanparts.com/911-engine-rebuilding-forum/722362-dads-911sc-i-am-finishing-rebuild-long.html Other cars: 1993 Corvette LT-4/ZF6, polo green. 22 Ranger 4x4 with a couple cool things. |
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83 Targa
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It's in and I opted for dry on the OD with oil on the ID. I decided to put the seal in the freezer over night and the seal went in nice and square and flush.
Thanks again! Bill |
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Member 911 Anonymous
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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83 Targa
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I did the freezer trick but opted for curil, some do it, some don't.
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72 911 Although it is done at the moment, it will never be finished. |
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bumping an old thread as I am about to accomplish this saturday.
any more opinions |
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It is all about technique......
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Jim, You could install the oil seal dry as is or with some Curyl-T. Both method works. The key to a successful installation depends on the method and technique. The flywheel seal should be mounted straight from start to end using an appropriate tool or device. I have been using my home-made PVC tool with three bolts for installation with good results. Much better than using rubber mallet and a piece of wood. Tony |
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Quote:
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Make sure you de-burr the bore, get it nice and smooth. I screwed mine up the first try using a home made tool. Next time I froze it, ran outside and it slid in like butter. Some say to go deeper, or not as far depending on if you see a groove.
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72 911 Although it is done at the moment, it will never be finished. |
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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If you have the Porsche tool, it doesn't get much easier. Just wet the OD to let it slide in easy. DON'T use Curil T.
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Kevin L '86 Carrera "Larry" |
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My first one was set too deep and leaked. Dropped engine again and installed second one a little shallower and no problems.
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Ed 1973.5 T |
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