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#48403 - 07/29/06 5:54 am Case sealant? Yes/no- which one?  
Joined: Mar 2006
Posts: 404
Vetterdog Offline
BritBike Forum member
Vetterdog  Offline
BritBike Forum member

Joined: Mar 2006
Posts: 404
Central NJ
I am reassembling my A65 motor and was wondering which, if any case sealant is best. I have seen Three Bond stuff on the web, but not locally. Anyone with advice/knowledge who'd like to weigh in on the subject, I'd sure appreciate it.
Thanks, Dave


vdog
66 6T
67 A65L
72 T100R
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#48404 - 07/29/06 6:21 am Re: Case sealant? Yes/no- which one?  
Joined: Dec 2002
Posts: 3,227
leon bee Offline
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leon bee  Offline
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Joined: Dec 2002
Posts: 3,227
arkansas
I bought the Threebond stuff from some Harley type outfit online after I found out it was same as Yamabond which is frequently recommended by our experts. It is really good stuff.

#48405 - 07/29/06 11:10 am Re: Case sealant? Yes/no- which one?  
Joined: Jul 2005
Posts: 1,919
John RGS Offline
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John RGS  Offline
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Joined: Jul 2005
Posts: 1,919
new jersey usa
Check the mating surfaces for burrs and make sure they are cleaned of oil and any schmootz. I've used Indian Head Gasket Shellac for case sealing for over 20 years without any problem. Put on a thin coat. You can get it at any auto parts store for about $1.50. Stay far away from silicone red, blue sealers on any surface anywhere near an internal engine component.


,_o
_ -\_<,
(*)/'(*)

NOPGS #2
#48406 - 07/29/06 12:14 pm Re: Case sealant? Yes/no- which one?  
Joined: Oct 2003
Posts: 11,108
RF Whatley Offline
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RF Whatley  Offline
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Joined: Oct 2003
Posts: 11,108
North Georgia, USA
John is right. IMHO, 99% of engine sealing is in the prep work. I scrub my mating surfaces with fine Scotchbrite or other kitchen scouring pad and lacquer thinner. It's got to be flat, clean, and absolutely free of oil. Use lots of thinner and compressed air.

Given a choice, a light grey sealer will be invisible after the job is finished. A red or blue sealer sticks out like a sore thumb for years.

bigt


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
#48407 - 07/29/06 4:02 pm Re: Case sealant? Yes/no- which one?  
Joined: Mar 2006
Posts: 404
Vetterdog Offline
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Vetterdog  Offline
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Joined: Mar 2006
Posts: 404
Central NJ
Once again, I am in your debt, the project continues. Look for pics of completed bike in.......uh,soon?


vdog
66 6T
67 A65L
72 T100R
#48408 - 07/29/06 4:04 pm Re: Case sealant? Yes/no- which one?  
Joined: Mar 2006
Posts: 404
Vetterdog Offline
BritBike Forum member
Vetterdog  Offline
BritBike Forum member

Joined: Mar 2006
Posts: 404
Central NJ
BTW John, where in Jersey are you? I'm in Somerset County.


vdog
66 6T
67 A65L
72 T100R
#48409 - 07/29/06 6:04 pm Re: Case sealant? Yes/no- which one?  
Joined: Oct 2003
Posts: 11,108
RF Whatley Offline
BritBike Forum member
RF Whatley  Offline
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Joined: Oct 2003
Posts: 11,108
North Georgia, USA
V-Dog -
I see you ordered the A65 "kit". laughing


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
#48410 - 07/29/06 9:21 pm Re: Case sealant? Yes/no- which one?  
Joined: Jul 2005
Posts: 1,919
John RGS Offline
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John RGS  Offline
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Joined: Jul 2005
Posts: 1,919
new jersey usa
Was there yesterday at the balloon fest. I'm in Sussex county. My shop was in Morris county for 20 years. Now in Montague.


,_o
_ -\_<,
(*)/'(*)

NOPGS #2
#48411 - 07/30/06 9:17 am Re: Case sealant? Yes/no- which one?  
Joined: Oct 2004
Posts: 4,429
Tiger Offline
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Tiger  Offline
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Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Threebond is great but John RGS is correct, poor or dirty sealing surfaces are a recipe for failure.
The case joint is the first one you put togeather and if that leaks you strip all the rest to go back there.


1969 TR6R
7.62 x 51 is not a maths puzzle.
#48412 - 08/03/06 2:24 am Re: Case sealant? Yes/no- which one?  
Joined: Jun 2003
Posts: 178
mike2937 Offline
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mike2937  Offline
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Joined: Jun 2003
Posts: 178
Colonial Heights, VA
i use a product call mopar gasket maker,part number 4318083 its an anarobic sealer,works great never had an issue,use it sparingly, it little goes a long way,any dodge chryler jeep dealer should have it.i tube lasts for years.

#48413 - 08/03/06 4:20 am Re: Case sealant? Yes/no- which one?  
Joined: Jul 2006
Posts: 21
richardvarcoe Offline
BritBike Forum
richardvarcoe  Offline
BritBike Forum

Joined: Jul 2006
Posts: 21
Fort Worth
The secret to a good seal is to make sure that both halves of a casing are "Totally" flat. I actually used an engineers table and some engineers blue (a sort of paste) to flatten the crankcases on a B40. When I first put them on the table they actually wobbled?!!!
This was down to burrs around the holes where the fasteners fit, and poor casting technique?
The burrs can be removed using a large drill bit, and the procedure to flatten the cases takes alot of work, but is well worth it!
If you get it right then all you need is a thin smear of "Hylomar".
This stuff is available on the web, and endorsed by Rolls Royce.
I have even seen a set of Goldstar crankcases that were so 'true' after re-work that they only required a smear of vaseline to seal!!
Food for thought?!!

#48414 - 08/03/06 12:43 pm Re: Case sealant? Yes/no- which one?  
Joined: Mar 2005
Posts: 9,970
John Healy Online content
John Healy  Online Content


Joined: Mar 2005
Posts: 9,970
Boston, Massachusetts
i use a product call mopar gasket maker,part number 4318083 its an anarobic sealer

I agree, good stuff!!!
john


#48415 - 08/03/06 8:45 pm Re: Case sealant? Yes/no- which one?  
Joined: Aug 2001
Posts: 1,875
Ron - in California R.I.P. Offline
In Remembrance
Ron - in California R.I.P.  Offline
In Remembrance

Joined: Aug 2001
Posts: 1,875
California
OK, may as well add another idea.... Try the clear silicone adhesive sealant (like aquarium sealant). It resists oil, and won't show as it is clear. Yes it will be a bit harder to get the cases apart next time, but not that bad....

Cheers..!!

Ron


Moderated by  Alan_nc 


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