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Old 05-22-2009, 06:54 AM   #1
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Default Sealing a motor

Is it necessary to seal a new motor? Are there any downsides?
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Old 05-22-2009, 07:03 AM   #2
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Quote:
Originally Posted by piranha21 View Post
Is it necessary to seal a new motor? Are there any downsides?

Not always mandatory... but a good idea.

Use this: http://www.amainhobbies.com/product_...ducts_id/17237

I do carb neck, backplate, pinch bolt...
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Old 05-22-2009, 07:08 AM   #3
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I do it as a just in case on every engine. Carb neck, pinch bolt, HSN/fuel nipple assembly, backplate and carb boot
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Old 05-22-2009, 07:13 AM   #4
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how do you do the pinch bolt and the boot?

Last edited by piranha21; 05-22-2009 at 07:53 AM.
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Old 05-22-2009, 08:22 AM   #5
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To do the pinch bolt, just cover both ends of the bolt with sealant. To do the carb boot, put a small zip tie around the bottom of it where it slips over the carb body.

Definitely seal all of your engines. You'll go insane chasing the tune at some point if a leak develops.
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Old 05-22-2009, 08:34 AM   #6
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I agree, whether it is A $150 engine or $500 engine always seal them. I use the red high temp rtv.
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Old 05-22-2009, 09:48 AM   #7
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http://www.youtube.com/watch?v=PopyUFy6j34

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Old 05-22-2009, 10:34 AM   #8
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You might laugh but i use brushable liquid electrical tape. It friggen works!
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Old 05-22-2009, 10:36 AM   #9
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Quote:
Originally Posted by imaxx21 View Post
That's a great "how not to" video... The problem is they're under the assumption that the sealant is a silicone based sealant and it's not. That sealant just like mine (Lucky7) should NOT be used like a gasket maker or any other silicone based RTV. Lucky 7 is a wick drying air seal that should be used externally only. It's a coating sealant, not a gasket.

No offense imaxx.
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Old 05-22-2009, 11:24 AM   #10
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sealing an engine is good practice and will make thing's easier in the long run!

i leave the carb for last as i want to seal it in the posistion i will be running it in kinda hard to do when the engine is not installed in the vehicle....

i use loctite sensor safe "ultra black" picked up a huge tube for like $5 at my local canadian tire
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Old 05-22-2009, 01:52 PM   #11
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I use permatex ultra copper. O2 sensor safe. It'll last longer than the standard RTV if it is O2 sensor safe..

For the OP, YES you should always pull back plate and seal, as well as the carb. Tuning issues can be a real PITA no need in making them worse by not know if it is sealed or not.
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Old 05-22-2009, 04:19 PM   #12
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RTV of any color sensor safe or not IS NOT FUEL PROOF...very few kinds of silicone will withstand the nitro...the RTV may appear to seal but it will go gummy in no time as the Nitro eats away at it....Three bond 1211 or Racer's Edge Carb sealant or Lucky 7 are the 3 products that i use.
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Old 05-23-2009, 06:32 PM   #13
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ttt
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Old 05-23-2009, 06:57 PM   #14
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Dang, I just started a thread about this. Stupid search option. LOL. Anyways, does the Racers' Edge sealant set-up/dry inside the tube between uses?

I have been using Versachem's Mega Black and it works great. Only problem is the sealant will dry in the tube and then I have to dig and dig to get to the fresh sealant. It's annoying to dig in that little tube for 10 minutes when sealing the whole engine is only a 10 minute job.
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Old 05-23-2009, 07:41 PM   #15
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you want the Racer's Choice or Lucky 7 type sealant...
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