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Old 04-03-2008, 08:12 AM   #1
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Default Engine sealing.

Does it really make a difference when you seal the backplate and carb with a sealent?If so what is a good brand to use?I see people doing this and just wondering if I should do it.I have an LST2 coming and wondering if I should seal it.Thanks.
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Old 04-03-2008, 08:38 AM   #2
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Well, with many engines, it's unnecessary. But it can't hurt, as long as you don't get any of the sealant inside the engine. If after you've broken it in, it acts weird and won't hold a tune, then try sealing the carb and backing plate, those are they typical culprits.
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Old 04-03-2008, 08:38 AM   #3
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Quote:
Does it really make a difference when you seal the backplate and carb with a sealent?
Huge, if you have an air leak!!! And why take a chance? I've seen people throw motors away because they were constantly chancing a tune and got frustrated. Thinking the motor was no good, when all it had was a small air leak. Every motor I own, I seal up. After each motor cleaning and inspection, it gets re-sealed up. I spend too much time and money racing to even take a chance.


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If so what is a good brand to use?

Racers Choise "Air-Seal" is the best I've used. But its hard to find at time. Racers Edge makes one too, but when it drys it become very rubbery. Can be a little pain to clean off, when cleaning a motor. Or go to your local Auto parts store, and get Permatex "Ultra Black". It also a high temp RTV gasket sealer. All of them work great. Just the Air seal, drys the fastest, and is by far the easiest to clean off. Just remember a little sealant goes a long way.
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Old 04-03-2008, 09:44 AM   #4
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Thanks for the info.I will put it to good use.
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Old 04-03-2008, 10:32 AM   #5
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Like Steve said, it's huge if you do have an air leak. The best thing about sealing the engine when it's new is that you don't have to clean it before taking it apart and you don't have to worry about leaks right from the get go.
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Old 04-03-2008, 10:44 AM   #6
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Ditto on the Racer's Choice air seal. www.carolinasrc.com has it.
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Old 04-03-2008, 01:11 PM   #7
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The Racer's Choice is no longer available. TKO will be bringing it back soon.
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Old 04-03-2008, 01:41 PM   #8
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Yeah, I guess I've had my bottle for about 4 years. haha
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Old 04-03-2008, 03:10 PM   #9
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Nothing Permatex or RTV related will work on Nitro.....the only stuff that is actually Nitro Proof is the Racer's edge stuff already mentioned...but the Original Product is Three Bond 1211....the Racer's edge smells Identical to 1211...and the 1211 is a little stretchier and easy to apply....all sealant is a pain to remove..but using the Right sealant is 10000X more important....and Ill 2nd what Steve Walters said..."I spend too much time and money racing to even take a chance."...its Just Not worth it.
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Old 04-03-2008, 07:27 PM   #10
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Orange rtv (sensor safe) works great. I've used it for years and it has always done the job. Any auto store will have it.
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Old 04-03-2008, 10:32 PM   #11
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Stupid question-whats the technique used for sealing the carb and back plate? Do you smear this stuff around when everything is mounted or do you take the back plate and carb off?
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Old 04-04-2008, 01:19 AM   #12
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http://www.amainhobbies.com/product_...ducts_id/17237

Racer's Edge air sealant.
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Old 04-04-2008, 01:25 AM   #13
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Quote:
Originally Posted by rallyebmx View Post
Stupid question-whats the technique used for sealing the carb and back plate? Do you smear this stuff around when everything is mounted or do you take the back plate and carb off?
thats not a stupid question but here is a great write up on how to do it



http://www.savage-central.com/module...wtopic&t=54465
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Old 04-04-2008, 03:57 AM   #14
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The best stuff I have ever used is called "GM Gasketmaker" from GM !
IT comes in a little red tube and works PERFECT! What the stuff is ,is an anerobic sealer , and is impervioius to nitro or any other form of fuel for that matter. best of all it will never really harden up on you so it cleans up nicely.
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Old 04-04-2008, 07:14 AM   #15
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Quote:
Originally Posted by jbrow1 View Post
Orange rtv (sensor safe) works great. I've used it for years and it has always done the job. Any auto store will have it.



Put a blob in a small container...then SOAK it in Nitro...see what happens to ur precious RTV....IT MELTS...cuz its not NItro Proof...Trust me it may appear sealed...but ANY leakage and the bond has been broken....Ive seeen SOO many LEAKY RTV sealed motor's its not even funny....1211 or Racer's edge is the ONLY Stuff ill trust....Ive heard of the GM stuff and YamaLube that yamaha tech's use on there motor's......cheesecake thats a decent write up but with the WRONG Sealant....I wish that thread never existed so someone could do a Proper version with the Right sealant.
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