donbeatya

hey looking for input on engine sealing who does it who doesnt and how.
ive owned two trx2.5r, one trx 3.3, one hpi k4.6ho and my temps have never been under 250 well that is when running with best performance now i just invested in a 18tm for my revo, v-spec for my new mbx5r buggy and a novarossi 528 for my he#@fire and want to get the best out of them so please help

DaveG55

Well, i don't seal every engine but I do if I suspect that I have an air leak.
What you need is some sensor safe silicone gasket maker. You can get it at any auto parts store, Wal Mart, etc. I use Permatex, High Temp, RTV Silicone gasket maker.
You apply it to the engine backplate and the base of the carb. Be sure to clean the mating surfaces to remove dirt, oil, fuel, etc, I use alcohol. Then apply a very thin bead (I use a tooth pick) to the engine and then bolt on the backplate using blue loctite on the screws. For the carb, remove the carb, clean everything well, apply a thin bead of sealant to the mating surface of the carb, slide it in and tighten it down. Let the engine sit for 24 hours so the silicone can cure.
Remember, use sensor safe silicone and use it sparingly.

beelzebubishere

My Feedback: (1)

Kliff seals those we use that are known to need it from the get go..... or if any symptoms of a vacume leak show up, an engine will get sealed as will evry single one of that same make and model in the future.
For the details, you'd need to ask kliff.

a8man

Here is a great write-up:
http://www.savage-central.com/module...wtopic&t=54465

Btw, I browse the Traxxas forum very sparingly as I do not own a Traxxas R/C or even plan to own one, just to help people with general problems/questions. It seems that every post or sentence you, beelzebubishere, write contains the name "Kliff". I read from other posts of that he is your sibling and I feel that you either worship him or are obsessed with him. I know that is not any business of mine how you feel about a family member of yours but do you get all your Intel from "Kliff"? Is that what you base you knowledge on; What "Kliff" does or says? You talk about "Kliff" as would talk about a company who sponsers you. A clear example of this is your signature even.

beelzebubishere

My Feedback: (1)

And your point is? Yes we are brothers, and we have been in Model hobbies since the early '60's. Kliff pursued mechanics for his life's work, and it trickled down from supercharged, alcohol burning Hemis and BBC's to H-D motorcycles, VW's, and model engines. I, on the other hand, pursued a more administrative career, and in the last few years have gotten into suspension and radio set-up in MT's. But betwen the 2 of us there is a cumulative modelling knowledge base of 80+ years. No, not all my intel comes from Kliff, as I'm no dummy in my own right, but I prefer to yeild to his advice on ANY engine issue.

Yes, I'm very proud of my brother, and maybe I do proclaim it quite often......he has done me more favors and supported me through many tough situations in our life, even though I'm the eldest. It's just one of the small ways I can show him my appreciation. I'm really sorry if that seems to offend you, but Kliff won't be around forever, and I just want him to know I feel.

125cchyperman

Now I know that me and beelz havent exactly been seeing eye to eye here lately but I have to say something here.

The reason why Beelz has <quote by Kliff, circa 1974> is because of me, I thought that it was funny that my and his sig where similar, I thought that he was making fun of me (this is before we started seeing things differently) but it turned out that they where just similar and nothing else. As for him saying a lot about kliff so who cares. Kliff is a very knowledgable person who I willing to help a lot of people as long as you dont get on his bad side, which I have unfortunately done. But I dont feel as if I need any help, I just dont like having enemy's.

But as you said who it's none of your business so why would you ask. As I said me and Beelz have not been seeing eye to eye lately but sometimes you just have to stick up for another person even though you havent been seeing eye to eye lately.

As for the sealing up of the engine DaveG55 and Beelz have put up some good info.

Indecline099

wow that is a really great write up and it couldnt have come at a better time, i was just researching this to do on my os .18, thanks

Harvick

Great link!!!!! Thank you!

EschObfuscation

What does sensor safe mean?

DaveG55

Certain chemicals in silicone will damage oxygen (and other?) sensors in 1:1 cars so gasket/sealer makers designed a product that could be used w/o damaging them. Hence Sensor safe.
I'm not sure why that is always specified for rc use though. I always assumed that non sensor safe sealer could damage o-rings or would react with the fuel but IDK for sure. So I've always operated on the "better safe than sory" theory.

EschObfuscation

Great, thanks for the info. I've just gone through the sealing process using High-Temp sealant that isnt sensor safe. I guess I'll let you know if it goes awry.

Indecline099

i went to pick up some rtv last night but i noticed that there is a red and blue version, which one should i get, the red was high temp, i dont know what the blue was, im guessing just the normal version

beelzebubishere

My Feedback: (1)

Neither.....get copper.

tommythecat

My Feedback: (2)

I seal mine if I suspect a leak. I generally seal with red RTV, but have been told the copper is the better way to go (although I haven't had any problems with the red and the tube I have should last about 3 more lifetimes so I will probably not end up buying or trying the copper)

I seal with a tiny amount around the carb neck and on the backplate.