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as we know it’s hard to post videos. If no one can see it let me know I’m gonna post up some pictures instead
I wanted to give everyone a quick video of what I have been preaching for years now. Carbon build up on an m157 needs to be addressed more then most methods. Now over the years I’ve been able to combat build up with the oil we are using. 5w50 amsoil or anything with in this spec of oil or better. I have been documenting the difference in build up, valve deposits , top offs etc. and I have always stated that a big part of scoring comes from carbon build up that break apart over time. So I decided to record a video bore scoping of a customers car , and we were able to catch this event right after it happened, allowing us to show everyone how carbon build up can and will cause cylinder scoring. This is real world documentation that you can see with your eyes. Not an assumption, not a theory.
Showed my dirty valves this summer. 73k. Glad to have cleaned them before any issues. Very short oci for 30k miles with 5/40, premium gas. Ceratec and sn oils were not the best. New chemistries and knowledge should help us in the future. Thanks for the video. Did it while at the dealer where they had the intake off. This dealer doesn’t offer walnuts but he did a pretty good job with chemicals. They charged me one extra hour,
Last edited by Baltistyle; Dec 18, 2025 at 05:38 PM.
14 E63, 05 E55, 03 Evo 8, 08 F250, 06 R6R, 92 Talon TSI, and instability
Originally Posted by Baltistyle
Showed my dirty valves this summer. 73k. Glad to have cleaned them before any issues. Very short oci for 30k miles with 5/40, premium gas. Ceratec and sn oils were not the best. New chemistries and knowledge should help us in the future. Thanks for the video. Did it while at the dealer where they had the intake off. This dealer doesn’t offer walnuts but he did a pretty good job with chemicals. They charged me one extra hour,
They did a really good job for that not being walnuts.
Showed my dirty valves this summer. 73k. Glad to have cleaned them before any issues. Very short oci for 30k miles with 5/40, premium gas. Ceratec and sn oils were not the best. New chemistries and knowledge should help us in the future. Thanks for the video. Did it while at the dealer where they had the intake off. This dealer doesn’t offer walnuts but he did a pretty good job with chemicals. They charged me one extra hour,
your lucky one hour extra . That takes a few hours to get them clean even with chemicals . On avg takes me about 30-45 min per cylinder on the intake valve side. They came out great . And it makes a difference in flow and response
Thank you for posting these clear cylinders inspection pictures.
That looks like clear evidence showing pistons have grabbed hard carbon and roll pieces down the bore.
We see this carbon being feed by oil rather than fuel as cylinder is extremely oily suggesting stuck rings from burnt oil.
most m157 look like this and alll m157 will have bad carbon build
ul on the valves . Theres not much that can be done . It’s the nature of direct injection. The low tension rings all allow oil blow by. The manufacturer state oil blow by is normal and oil will be needed from time to time. So in this case , this engine is healthy, and looks pretty much like the avg m157. I will say this is cylinder 5 . Always the one that takes the most abuse. Compression across all cylinders are within spec of each other
your lucky one hour extra . That takes a few hours to get them clean even with chemicals . On avg takes me about 30-45 min per cylinder on the intake valve side. They came out great . And it makes a difference in flow and response
Yes, he said it might have taken two hours. I was in for some work before the warranty ran out and it took a bit of extra time for them to do and I was in no rush so he hooked me up. I never remember but I think the labor rate is 260 so it was a good deal for sure. The car did feel a bit better afterwards, and there were measurable results when monitoring the car. I do really do believe with new oils, and knowledge, and proper warmups, maybe a catch can, these engines will be quite a bit better lasting.
I also know that most people are not a fan of intake chemicals but I personally believe that after cleaning the valves, using these intake cleaners and fuel additives with pea will keep the valves cleaner than if these things are not done. Many people hope a cleaner cleans dirty valves but I look at it as keeping clean valves clean. It's cheap and easy to do before an oil change. It will be interesting next time I do it to see if it smokes much, because last time it was like I burned down my neighborhood.
What brand or product did you use for intake cleaner.
to conclude, walnut blast than routine pea cleaner for the fuel and intake cleaner is what you’d recommend?
What brand or product did you use for intake cleaner.
to conclude, walnut blast than routine pea cleaner for the fuel and intake cleaner is what you’d recommend?
yes, in my opinion. Any intake cleaner with pea. I like berrymans but it’s not a high pea (I can remember now but I don’t think it’s any) like crc.
OK I'm gonna go for it. I'll dig up the proceure for removing the intake manifold and manually clean My intake vavles. Ugh I hate how much I love this wagon.
OK I'm gonna go for it. I'll dig up the proceure for removing the intake manifold and manually clean My intake vavles. Ugh I hate how much I love this wagon.
Wagon Mafia....
The intake removal will be the hardest part... lots of videos online on how to clean with chems. The intake procedure is listed here on the forums, someone posted the WIS.
Probably a novice question.. I own effectively three of these engines including the 4.7's. So if I pull off the heads and start cleaning things how do I rotate the engine to take care of the cylinders that might be at tdc?
Probably a novice question.. I own effectively three of these engines including the 4.7's. So if I pull off the heads and start cleaning things how do I rotate the engine to take care of the cylinders that might be at tdc?
Manually rotate the crank to make sure valves are closed. Clean, rotate, clean.
Well I've called every indy shop that works on MB within an hour drive of Me. Nobody will touch valve cleaning. I'm roughly 3 hours northwest of NYC if anybody has a recommendation.
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