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Crankcase joint sealing compound recommendation #394958
09/18/11 2:40 pm
09/18/11 2:40 pm
Joined: Dec 2010
Posts: 494
Upstate NY
Snakeoil Offline OP
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Snakeoil  Offline OP
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Joined: Dec 2010
Posts: 494
Upstate NY
Is there a preferred and proven sealant to use when mating the crankcase halves together. I've heard that Threebond, Yamabond and Hondabond all highly recommended. I have a new tube of Threebond that I was planning to use when putting my engine back together. But I thought it would not hurt to ask if there is another and more preferred compound. I would think that working time is a desirable feature.

Thanks,
Rob

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Re: Crankcase joint sealing compound recommendation [Re: Snakeoil] #394960
09/18/11 2:51 pm
09/18/11 2:51 pm
Joined: Jul 2009
Posts: 3,549
Vic. Australia
P
Pete R - R.I.P. Offline
In Remembrance
Pete R - R.I.P.  Offline
In Remembrance
P
Joined: Jul 2009
Posts: 3,549
Vic. Australia
If you want plenty of working time,try Loctite 518.You can take all the time in the world.It won't go off until you close the surfaces.

Re: Crankcase joint sealing compound recommendation [Re: Snakeoil] #394975
09/18/11 5:18 pm
09/18/11 5:18 pm
Joined: Sep 2010
Posts: 85
so.cal
Torch Offline
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Torch  Offline
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Joined: Sep 2010
Posts: 85
so.cal
three bond is an amazing product, try it and see why.


"Statesman" is the term often used to describe a deceased politician, we need more Statesmen.
Re: Crankcase joint sealing compound recommendation [Re: Torch] #394982
09/18/11 6:15 pm
09/18/11 6:15 pm
Joined: Sep 2007
Posts: 1,088
Ottawa, Canada
gREgg-K Online content

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gREgg-K  Online Content

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Joined: Sep 2007
Posts: 1,088
Ottawa, Canada
I second the endorsement of Loctite 518 for alloy cases, and 515 for other surfaces. Very nice to work with, and any material left on the case surfaces simply wipes off with a rag, while the stuff between the case flanges cures in teh absence of air.

The ThreeBond product is also great, and comes under various brand names: HondaBond, YamaBond, etc depending on where you buy it. The latest retail version is known as ThreeBond 1194, and it replaces previous formulations.

... Gregg


Spyder Integrated Technologies
Lucas, BTH, & Miller Magneto & Dynamo Restoration
SMITHS Chronometric Restoration
magneto@spyder-it.com
Re: Crankcase joint sealing compound recommendation [Re: gREgg-K] #394994
09/18/11 8:19 pm
09/18/11 8:19 pm
Joined: Dec 2010
Posts: 494
Upstate NY
Snakeoil Offline OP
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Snakeoil  Offline OP
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Joined: Dec 2010
Posts: 494
Upstate NY
Thanks guys. I'd heard the Loctite product mentioned before. But the endorsement of Threebond here an on a number of other marque sites pretty much "cements" the recommendation.

regards,
Rob

Re: Crankcase joint sealing compound recommendation [Re: Snakeoil] #394996
09/18/11 8:23 pm
09/18/11 8:23 pm
Joined: Jun 2007
Posts: 5,557
Maui Hawaii
HawaiianTiger Online content

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HawaiianTiger  Online Content

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Posts: 5,557
Maui Hawaii
Folks rarely state the other reasons to use a particular gasket compound other than if it keeps oil inside.
I have other considerations as well.
Is it easy to use?

Is it cheap?

Is it versatile?

Does it clean up easily?

A biggie for me. Do the parts come apart without undue violence?

Does it last in the tube without going off?

Other things matter as well, such as does it take up much space dimensionally, or does it flake or crumble and block small oilways(another biggie).

I'm looking forward to trying the Loc-tite products when my big tube of Permatex Ultra-Blue runs out.

Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: Crankcase joint sealing compound recommendation [Re: Snakeoil] #395053
09/19/11 6:04 am
09/19/11 6:04 am
Joined: Sep 2011
Posts: 944
New Zealand
Excalibur Online content
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Excalibur  Online Content
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Posts: 944
New Zealand
+1 for loctite.
I've used since the 70's.
Some notes on preparation that may help...
Carefully remove burrs from the joint faces.
Properly clean the surfaces, finishing with scotchbrite till somewhat shiney.
Thoroughly degrease the mating surfaces.
Have the fasteners clean, buffed and ready to go.
Chase the screw/bolt threads if they aren't perfect.
Clean any threaded holes with a tap if gummed up.
No rush needed for assembly as the sealer won't cure till bolted up.
A very small amount squeezed out of joint, indicates correct amount used.
Loctite is anerobic, so will only cure in the ABSENCE of oxygen.
Clean surplus up with a rag on exterior.
Interior surplus washes off with the oil that splashes around.
Loctite isnt a glue!
Disassembly and cleaning off old Loctite is easy to moderate.
It's cheap and widely available.
Lasts for years in the tube.

Re: Crankcase joint sealing compound recommendation [Re: Excalibur] #395068
09/19/11 11:26 am
09/19/11 11:26 am
Joined: Feb 2009
Posts: 188
London, England
Triumph5ta Offline
BritBike Forum member
Triumph5ta  Offline
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Joined: Feb 2009
Posts: 188
London, England
I have had good results with Wellseal.

Re: Crankcase joint sealing compound recommendation [Re: Triumph5ta] #395995
09/24/11 5:37 pm
09/24/11 5:37 pm
Joined: Nov 2010
Posts: 332
UK and michigan
M
malla1962 Offline
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malla1962  Offline
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M
Joined: Nov 2010
Posts: 332
UK and michigan
Originally Posted By: Triumph5ta
I have had good results with Wellseal.
Thats all I have ever used, works every time

Re: Crankcase joint sealing compound recommendation [Re: Snakeoil] #396076
09/25/11 10:44 am
09/25/11 10:44 am
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Tiger Offline
BritBike Forum member
Tiger  Offline
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Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Threebond and Yamabond and Kawasaki bond are all the same product but bend over and touch your toes if you buy across a Jappa dealer's spares counter as their "brand".

Last case halves I "glued" togeather with Threebond are still togeather, that said any competent mechanic will get them apart with little effort.

Propritary gashet solvent will remove any residual but I spray that onto cotton buds [Qtips ?] and apply locally rather than spray the whole job.

Excellent stuff.


Last edited by Tiger; 09/25/11 10:46 am.

1969 TR6R
7.62 x 51 is not a maths puzzle.
Re: Crankcase joint sealing compound recommendation [Re: Snakeoil] #396258
09/26/11 6:06 pm
09/26/11 6:06 pm
Joined: Jan 2006
Posts: 6,751
Laredo (South) Texas, USA
GrandPaul Online content
BritBike Forum member
GrandPaul  Online Content
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Joined: Jan 2006
Posts: 6,751
Laredo (South) Texas, USA
DON'T FORGET THE TIMED BREATHER DISC & SPRING!

...and the two spigot mouth screws...

Last edited by GrandPaul; 09/26/11 6:07 pm.

GrandPaul (does not use emoticons)
Author of the book "Old Bikes"
Too many bikes to list, mostly Triumph & Norton, some BSA & European
"The Iron in your blood should be Vintage"
Re: Crankcase joint sealing compound recommendation [Re: GrandPaul] #396301
09/26/11 10:15 pm
09/26/11 10:15 pm
Joined: Aug 2011
Posts: 416
OZ
O
Old Cafe Racer Offline
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Old Cafe Racer  Offline
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O
Joined: Aug 2011
Posts: 416
OZ
3 Bond is the same as loctite Ultra Grey.
Same stuff but better price.

.

Re: Crankcase joint sealing compound recommendation [Re: Old Cafe Racer] #396341
09/27/11 5:10 am
09/27/11 5:10 am
Joined: Sep 2007
Posts: 1,088
Ottawa, Canada
gREgg-K Online content

BritBike Forum member
gREgg-K  Online Content

BritBike Forum member
Joined: Sep 2007
Posts: 1,088
Ottawa, Canada
Originally Posted By: Old Cafe Racer
3 Bond is the same as loctite Ultra Grey.
Same stuff but better price.


Perhaps they are the same stuff in Oz, but in Canada, Ultra Grey is a fairly viscous silicone sealant, while ThreeBond is a thinner, almost watery sealant. It is white in color, and certainly not a silicone, judging by the smell.

I use both Ultra Grey and ThreeBond, and think they are both great products.
.. Gregg.


Spyder Integrated Technologies
Lucas, BTH, & Miller Magneto & Dynamo Restoration
SMITHS Chronometric Restoration
magneto@spyder-it.com
Re: Crankcase joint sealing compound recommendation [Re: GrandPaul] #396355
09/27/11 10:00 am
09/27/11 10:00 am
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Tiger Offline
BritBike Forum member
Tiger  Offline
BritBike Forum member
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Originally Posted By: GrandPaul
DON'T FORGET THE TIMED BREATHER DISC & SPRING!

...and the two spigot mouth screws...


Wise caution GP, I have seen a Professional Fool do that and then crudely butcher a '69 engine to '70 spec to avoid having to do the job properly. [spit emoticon]

Spigot mouth [lateral crankcase cyl base] screws are totally unnecessary and were deleted in later engines without detriment.

My engine broke a rod a while back and during disassembly the Phillips [Posidrive ?] screws you refer to could not be accessed by a tool much less loosened, that issue was overcome by an air hacksaw through the base flange surface of the broken timing side case.

Good case halves match well regardless of Threebond or not and with the cylinder base flange securely bolted on top that part of the crankcase is secure.

Pretty sure I did not make a mistake by leaving those screws out, the engine has done lots of work.

Allen head screws in that location would work if you must use them.


1969 TR6R
7.62 x 51 is not a maths puzzle.
Re: Crankcase joint sealing compound recommendation [Re: gREgg-K] #396790
09/30/11 3:10 am
09/30/11 3:10 am
Joined: Sep 2008
Posts: 193
Pullman, Washington, USA
T
Tobin Peever Offline
BritBike Forum member
Tobin Peever  Offline
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T
Joined: Sep 2008
Posts: 193
Pullman, Washington, USA
Just used Blue Hylomar to seal the inner gearbox cover to the crankcase and also to make myself a primary cover gasket. Nice stuff to work with and seems to work great.


47 Norton ES2
61 Norton Dominator 88
67 Triumph TR6C
68 Moto Guzzi V700
74 Norton Commando
08 Moto Guzzi 1200 Sport

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