Just wondering if anyone has used CRC, or something similar as in intake induced cleaning method for intake valve carbon build up?

 

This car doesn't suffer from carbon buildup on the valves. My car has 70k miles on it. And I have personally had the charger off several times and has not seen any signs of build up. Now when I pull the manifold of my S5, that thing is a carbon nightmare.

 

Thank you sir👍 Good to know. That eases my concerns on the carbon buildup issue in the cars

 

Interesting.
Over on the XF, XK and XJ forums there are lots of reports and pics of carbon build up on the backs of the inlet valves and on the intake tracts on higher mileage (70k plus) cars with the AJ133, both NA and SC. Also lots of opinions that this engine is known to suffer from this problem, albeit not nearly as badly as many other DI engines such as Audi V8s.
Please let us know your secret!
Not being a smart ****, I really would like to know what you do or have done to prevent carbon build up and I suspect many others would too.
Have you fitted an oil catch can? The jury is out on whether this helps reduce or prevent carbon build up on the AJ133 and most who have fitted one report very low amounts of oil capture.

 

Could the lack of carbon build up on your intake valves be due to your use of methanol injection?

 

Do you use methanol injection? I know that would eliminate the cabin build up issue. But it’s also something you don’t want to introduce pre supercharger i understand due to the coating used?

 

performance audi's have had this problem for ages. have not heard of our Jags having it.

 

You are not going to like this answer...
Forget the Jaguar sports cars with aj133 sc that live pampered lives and get an Italian tune up often...
Go look at the LR4 they frequently do 200k miles in grocery store runs driven by soccer moms.
Oil plays a huge factor in carbon buildup.

2 videos that touch on it.

There is one error in this otherwise brilliant video below, it asks "how do you know if the engine oil you are buying is good at keeping carbon deposits on valves low"
There is only one way- if you have thousands of engines do 200k miles with no compromising valve buildup, with a 12 month OCI.
That's what the castrol oil brings to the table (look I dont like them as much as the next guy for being consumer unfriendly) but then again no other brand is going to tell you with certainty, let alone proven results, how long of OCI with no buildup.

 

Here is an excellent solution for carbon deposits on valves and injectors.
The injectors on our cars have tremendous buildup.

https://www.jaguarforums.com/forum/x...leaner-225304/

 

My dealer has replaced injectors under warranty on a number of cars before '17.

 

No I purchased the car with 70k miles on it. Being that i am very mechanically inclined, the mileage didn't bother me. I pulled the charger for the first time to replace the water pump and all the coolant hoses and lines. And the valves were clean when I inspected them. Drove the car a couple thousand miles and pulled the charger again to replace the oil and the (can't remember the name)spring round thing behind the snout with a solid one. No buildup as well. And I've pulled it another 2 times after that when I started really modding the car. Meth has only been on the car recently, so that is not why they were clean. I thought it would've been an issue as well due to my other DI cars(335i, S5). But it wasn't no where close. The car just rolled 80k and still no carbon on the valves.

 

Using it pre charger shows no signs of premature wear on the supercharger. That myth has been busted years ago. I spray pre and post. I also don't spray alot. I have 3 small devilsown D01 nozzles in 3 locations.

 

Exactly, I would worry way more about the carbon on the injectors that locks them to the head, rather than the valves. I had an injector failure, and it was a total pain in the *** to get them out.

 

Seen the inside of a few of the AJ engines and they are always packed with carbon in the cylinder heads and where the injectors poke thru the head into the combustion chamber. But even the worst carbon'd up injectors always came out with some patience. i will be pulling my intake again this winter to inspect and will report back.

 

I heard there were patients missing from a local hospital. Now I know where they are.

 

You got me and my autocorrect reliant self.