Alright I have the my Se manifold off and I'm replacing the injectors there is hella carbon build up I don't think the first owner redline this thing every I did marval treatment and I probably broke huge chunks into the housings I don't wanna lose a seal whats the best way to prevent this. Let the marval sit a couple days and turn the motor by hand every once in a while open to any suggestions thanks.

 

Wheres tha carbon build up? Clean the manifolds before you put them on. Probably not a bad idea to remove the sleeves and clean them too.

 

there is alo around the six ports so thats where we cleaned. yeah I took all that apart and it's soaking right now. What can I do now that the carbons lose so I don't bust a seal keep it in there for a couple days a week sorry if I sound like a newb. but I poor and all my moneys going to this car and can't afford a rebuild.

 

marvel is the cure for cancer on ur RX7 =) , my friends have 1st gens with 210k + no rebuild, marvel every oil change. And ive started engines that havent worked for years and had a rotor stock, lil marvel, 48 hours, boom!

 

My suggestion would be to remove the lower intake manifold from the engine - this only takes an additional 30 minutes or so, and it sounds like you may already have done this step.

With the lower intake manifold off, you can get to the '6'-port sleeves and the primary and secondary intake runners. Get a clean rag and get as much of the carbon out of there as possible. As long as you haven't spun the engine over (or run it at all), then you haven't drawn this carbon crud from your upper intake system into the engine, and you can still get it out through cleaning.

The intake runners are almost horizontal, so you don't have to worry about stuff 'falling' into the rotor space. Just be careful when you clean, and you might want to rotate the rotors so that the passages are blocked by the side of the rotor as you clean those ports on the front or rear. This method worked well for me, and also gives you a chance to remove and clean the sleeves and bores for your '6'-ports so that they will turn smoothly and open slowly and consistently, like they were designed.

Best solvents to use are Brake Cleaner (petroleum distillates in a pressurized can), or ATF on a rag that you use to scrub the carbon away.

For cleaning the intake runners, I used a tooth brush, a brass bristle brush, and lots of Brake Cleaner. My brother likes to use EZOff oven cleaner on his intake system on his Q45, but that stuff eats aluminum, so I can't recommend it unless you REALLY dilute the stuff, and then use it for short duration soaking, ONLY.

Again, as long as you haven't spun the engine over, you should be fine to clean this up before it gets into your engine. HTH,

 

Thanks for the info bad thing is I turned the engine by hand to get the marval in all the combustion chambers. The marvals gonna be in there for a while I just sent the fuel injctors out to be rebuilt