2018 Diesel 100K Service - Upper Cylinder Clean + Fuel injector clean - necessary?

[vijith555]

I am just getting my car serviced at my regular Ultra Tune center. They just called me saying the car is ready for pickup and mentioned since my car is at 100K, it would be best to get the upper cylinders cleaned for ($229) and the injectors cleaned for ($129). I could have got the pricing mixed on both but these two items for sure. I said I will get them done later and opted to pickup the car today as I always try not to buy the additional/optional work garages try to add before they give back your car.

They said these are preventive maintenance and helps to clean the buildup and also helps in not needing to do more expensive gasket repairs in future. A bit confused here. I do use fuel doctor time to time (not regular) that is the only 'cleaning' from my end so far. I know there is lot of crap building up in the manifold on these plus other exhaust areas which cannot be really cleaned by over-the-counter stuff.

My question is have anyone here done these from a service center before and is it worth it? Or get a Jeep expert garage to do them instead? Also how important is it to do it now?

Or maybe just keep using Fuel Doctor for now without doing these till I reach about 140K-160K when I might most likely need to do a full manifold (plus other items around it) replacement/clean for about $3K from what I heard before. Leave the money aside for that day lol.

Cheers

[drover]

DON'T ...................... Upper cylinder clean and injector clean for that price, really ????? They will dose your fuel and dump a can of cleaner down the air intake, something you can do for about $60, well your half way using Fuel Doctor ........ done properly is a big job and be a few zero's to that price.......... it may need a proper clean up at 400,000 km ........................

A proper injector clean should only be done by a Diesel Shop not some general mechanic, especially Injectors and fuel pumps, they need clean rooms and special equipment.... Big $$$ as well.

Just change your filters regularly and clean the MAP sensor each service and it should all be good........ The Jeep will let you know when its getting clogged up, trust me on that. ... 3 CRD's to date and 2 went to 300K km without any need for any major cleaning and this one is going the same way .......

Fitting a catch can will lessen the amount of oil going onto the manifold and the gunge is drier and really removing the manifold and having it cleaned is about a Grand at most but soon as you drive away it will be starting again, if you give it good runs, don't sit idling and add a catch can really shouldn't need it done before 300K km .............. of course spending a grand to delete the EGR will stop the gunge ..........

They are just trying one on, I wouldn't go back myself ..............................

[vijith555]

DON'T ...................... Upper cylinder clean and injector clean for that price, really ????? They will dose your fuel and dump a can of cleaner down the air intake, something you can do for about $60, well your half way using Fuel Doctor ........ done properly is a big job and be a few zero's to that price.......... it may need a proper clean up at 400,000 km ........................

A proper injector clean should only be done by a Diesel Shop not some general mechanic, especially Injectors and fuel pumps, they need clean rooms and special equipment.... Big $$$ as well.

Just change your filters regularly and clean the MAP sensor each service and it should all be good........ The Jeep will let you know when its getting clogged up, trust me on that. ... 3 CRD's to date and 2 went to 300K km without any need for any major cleaning and this one is going the same way .......

Fitting a catch can will lessen the amount of oil going onto the manifold and the gunge is drier and really removing the manifold and having it cleaned is about a Grand at most but soon as you drive away it will be starting again, if you give it good runs, don't sit idling and add a catch can really shouldn't need it done before 300K km .............. of course spending a grand to delete the EGR will stop the gunge ..........

They are just trying one on, I wouldn't go back myself ..............................

Thank you so much for getting back with this response mate! Happy to hear it was really a money grab (which is very usual from places like this) and I had the same doubts how could they do that sort of a clean for just that sort of a money. I said no at the time more because I did not want some apprentice to screw up the car that is currently working without a problem. Thank goodness for that. I am minutes from picking it up from them and hoping they did what they were asked to and not any more.

Yes I am doing the fuel doctor and MAP sensor cleans myself which is something I got used to and easy. 300K is far far away from where I am currently and good to know you went to that mileage with a few CRDs before needing that sort of a cleanup job! That is way more than I was told by another mob who wanted $3000 to change my manifold when I had the throttle body issue which I got fixed a few months ago. Thankfully the advise from you guys prevented me from doing that unnecessary fix to fix something completely not related.

Catch can is the thing I am missing hopefully will try that one day when I am confident or get it done by someone. Preventive maintenance they said and looked up just like you said you can get DIY cans to do similar cleanups. But I am not going to attempt anything like that on my own because if I am not wrong, doing sprays could dislodge the crap from the top and lodge it in DPF for example? Could be wrong.

[TR Laredo]

But I am not going to attempt anything like that on my own because if I am not wrong, doing sprays could dislodge the crap from the top and lodge it in DPF for example? Could be wrong.

You’re on the right track. The sprays will definitely dislodge the crap & happily feed it into your DPF. Best way to clean the inlet manifold is to take it off the engine & clean it on the bench. I had mine cleaned at 160,000km when the turbo coolant supply hose under the inlet manifold let go.

Cheers