Recommended Posts

I've got a 2011 IS250 almost about to hit 60K mark, and i'm starting to worry about the dreaded carbon build up on these models. Honestly had i have done some more research on these cars, i would have gone for the350 instead, but its too late now. 
 

So i have read quite a few different stories about this issue, some saying that this problem is more widespread in the US due to the lower grade of fuel used there and so on, so i've come here. Has anyone dealt with this issue before in their 250? if so, at how many K's did it start giving you problems?

 

I'm one who does very little driving with this car on a daily basis and i drive it like an old man at best, so when i discovered this issue  online, i gave my car a good flogging around some corners and the amount of smoke visible in the rear view mirror was outstanding. Like a semi had just driven past, so i'm assuming my car already has some degree of carbon built up inside. 

What do you use to clean out the carbon if anything? Specific fuel additives or what not?

Interested to hear some stories about this.

Share this post


Link to post
Share on other sites
 

Have a look at this topic which was raised only a few days ago and is basically the same question.

There are people who specialise in carbon buildup removal (either a chemical removal or they use an abrasive walnut shell blast to physically remove the build up) and given the IS250/350 engine and inlet manifold is pretty easy to work on, the cost of labour to remove/replace the inlet manifold etc should be pretty low.

As an alternative, there are DIY sprays which you can buy for around $20-30 at Supercheap/Repco etc that will help to remove some of the buildup (they wont do the same as a proper clean but are better than nothing). Liquimoly make one that i have used quite a few times: https://www.supercheapauto.com.au/p-petrol-engine-intake-decarb---366g/348781.html

 

Share this post


Link to post
Share on other sites

I just put up a thread, but I high recommend hydrogen carbon cleaning.  It works extremely well, for my IS250 it did anyway.  Also, putting an oil catch can in afterwards will help for future prevention of carbon build up.

Share this post


Link to post
Share on other sites

Yeah mate, Molika on here also had it done recently with great results.  If you're having carbon build up issues, give it a go :) My car still feels a lot more responsive.

I think given time, hydrogen decarbonizing will become a lot more popular here in Aus.

Share this post


Link to post
Share on other sites

On 10/4/2018 at 3:38 PM, murry_is250 said:

Yeah mate, Molika on here also had it done recently with great results.  If you're having carbon build up issues, give it a go 🙂 My car still feels a lot more responsive.

I think given time, hydrogen decarbonizing will become a lot more popular here in Aus.

I actually dont know if i am experiencing any carbon build up, just read a lot about it online and wondering if there is any preventative measures i can take. My IS is still yet to reach the 60K mark, but i gave it a flog the other week (first time since i bought the car) and noticed an abnormal amount of smoke come out of the exhausts, indicating the engine is probably suffering from it already.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now