Whats going on everyone, I am new to club Lexus.

so today my son and I are going to be cleaning out his 2015 Lexus IS 250 F sport. He has been talking about doing a carbon cleaning with sea foam.
I've been doing some research and I have seen that a lot of people say that sea foam is actually harmful to the engine.

does any one have any solid advice that can direct me to the right choice for helping my son clean his carbon build up inside the intake manifold?

 

Are you certain the carbon buildup is in the intake manifold, rather than on the intake valves? I've never heard of this being an issue on the intake manifold. But, direct-injection engines commonly have some carbon deposits on the intake valves.

I don't think I've heard of Sea Foam being bad, necessarily. You'd need to actually clean the intake valves with some contact (i.e. cleaning solution + brushes) by hand to really thoroughly clean them, or else use media blasting (i.e. walnut blasting) to really get that stuff off.

 

well according to my son he took off his Hps intake and noticed it was dirty inside thee pipe so assuming that’s dirty would mean his throttle body is dirty which also assuming intake manifold is dirty. So he wants to use something to clean all three

 

All righty. Well, regarding Sea Foam, I highly recommend this video from Chris Fix -
It should demonstrate a real world example of using it and its effectiveness for you.

But for carbon cleaning, I think you'd also want to go ahead and clean the intake valves as well. I think Sea Foam is probably not the best way to go on that particular issue - like I said, probably going to need walnut blasting or just a good cleaner and some brushes to get that junk out of there.