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Old 02-08-2010, 01:10 PM   #16
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I use the Permatex Black RTV Silicone Hi-Temp sealant. It's at your local auto parts store. I've never had an issue with it what so ever and it works darn good. I use it in moderation on the back plate and base of the carb. The key word is MODERATION. I wouldn't recommend slapping a big blob on your engine where it could damage the internals. Just my 2 pennies.

Last edited by Torian4000; 02-08-2010 at 02:54 PM.
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Old 02-08-2010, 02:24 PM   #17
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hrmm....reading up on Permatex products i found this.
this is on the MSDS sheet for all of the silicone sealants.


Comments: When heated to temperatures above 300 degrees F. in the presence of air, this product can form
formaldehyde vapors. Formaldehyde is a potential cancer hazard and a known skin and respiratory
sensitizer. Safe handling conditions may be maintained by keeping vapor concentrations below the OSHA
permissible limit for formaldehyde
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Old 02-08-2010, 02:59 PM   #18
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Quote:
Originally Posted by Integra View Post
hrmm....reading up on Permatex products i found this.
this is on the MSDS sheet for all of the silicone sealants.


Comments: When heated to temperatures above 300 degrees F. in the presence of air, this product can form
formaldehyde vapors. Formaldehyde is a potential cancer hazard and a known skin and respiratory
sensitizer. Safe handling conditions may be maintained by keeping vapor concentrations below the OSHA
permissible limit for formaldehyde

Seems as if just being born causes cancer now. Who knows what we're exposed to on a daily basis. Especially us nitro lovers.
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Old 02-08-2010, 03:10 PM   #19
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Quote:
Originally Posted by Torian4000 View Post
Seems as if just being born causes cancer now. Who knows what we're exposed to on a daily basis. Especially us nitro lovers.

yea really and does any of us have, cancer because of nitro i think not. anything can cause cancer man.
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Old 02-08-2010, 08:52 PM   #20
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Sealant: Lucky 7

Where: Around the base of the carb after set up, under both ends of the slide bellows, around the banjo fitting, both sides of the pinch bolt and yes under the back plate.

A very thin bead around the back plate, not on the engine case. This way the sealant won't accidentally get pushed into the crankcase by the o ring.

Why; I don't trust orings and a little sealant goes a long way in diagnosing what you know is not the problem when it comes to an air leak.
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Old 02-08-2010, 10:10 PM   #21
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I have always used RTV as well. I know how to do it though :X

I may try this lucky 7, seams much easier, and better by the replies in this thread.

Although I don't always seal the engine. I check for leaks after every race though
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Old 02-08-2010, 10:22 PM   #22
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+1 on the permatex but the high temp orange sensor safe blend. would get a part number but its cold out
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Old 02-09-2010, 08:09 AM   #23
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Lucky7 is awesome, the way it flows to the cracks makes it so easy to seal any part, I go as far as sealing around the HSN since it wicks in and does not build up thick to interfere with the fuel tube. The only thing I have found, is to make sure you got some ventalation or put your seatbelt on, it's got some fumes. Great product!
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Old 02-09-2010, 08:13 AM   #24
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I use to use permatex bit lately I have been just replacing the oring on th carb and back plate. No mess to clean up and no issues so far.aybe os engines are just made better. I know I had to seal the grp or it would leak. Idk
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Old 02-09-2010, 08:15 AM   #25
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Quote:
Originally Posted by fukitol View Post
+1 on the permatex but the high temp orange sensor safe blend. would get a part number but its cold out
You mean the orange colored Permatex Ultra Copper #101BR this is nitro
proof (safe) it will not dissolve like other RTV's. R/C Nitro Magazine recommended it's use to seal nitro engines years ago. (ask Steve P)
Lucky 7 is probably a great product, but I'm a "old schooler" I don't mind
disassembling an engine and applying the sealer by hand.
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Old 02-09-2010, 09:11 AM   #26
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Quote:
Originally Posted by Frank L View Post
I use to use permatex bit lately I have been just replacing the oring on th carb and back plate. No mess to clean up and no issues so far.aybe os engines are just made better. I know I had to seal the grp or it would leak. Idk
OS's leak. Thats why I have the routine that I do when sealing these engines.

If you really want to find out get one of these;


Available here;

http://trackstarrc.com/trackstar/ind...mart&Itemid=64
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Sealing carb and backplate?-gmk-leak-seek-r.jpg  
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Old 02-09-2010, 09:50 AM   #27
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Thats pretty freakin cool Jimmy..... not sure how I missed that, never seen it before. Looks like I might need one now
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Old 02-09-2010, 10:01 AM   #28
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Quote:
Originally Posted by Racecrafter View Post
OS's leak. Thats why I have the routine that I do when sealing these engines.

If you really want to find out get one of these;


Available here;

http://trackstarrc.com/trackstar/ind...mart&Itemid=64
ok I'll go back to sealing. I know it's the best way. Thanks for the input.
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Old 02-09-2010, 10:02 AM   #29
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Im pretty sure in the instructions GMK has "use Lucky 7 sealant"
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Old 02-09-2010, 10:05 AM   #30
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Quote:
Originally Posted by jpalessi View Post
Im pretty sure in the instructions GMK has "use Lucky 7 sealant"
joe himself beat me to it. lol.
Quote:
Originally Posted by Frank L View Post
ok I'll go back to sealing. I know it's the best way. Thanks for the input.
frank that lucky 7 stuff is awesome, and order through joe a (lucky7rc.com) and get a discount with terribles.! i get all my airfilter and stuff like that from him!
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