Seafoam-ed My Dmax

[Shawn T]

I have been searching the local autoparts stores here for Seafoam. Low and behold it's always the last place you look. Auto Zone sells it. I had run my tank clear empty and was planning on dumping some kind of fuel treatment in anyway. I bought 2 bottles, one for the tank, and one for the intake/crankcase.

About 2 months ago, my LBZ developed a serious fuel knock when cold. I took it in under warranty and everything checked out. The mechanic said that the LBZ injectors are under the fuel rail and it only takes one instance of some water or bad fuel to make 1 start to to chatter. Also, ULSD has no lubricating properties what so ever and the LBZ, LLY, and LB7 injectors hate it. Long story short, rather than tear the top end apart chasing the noisy injector he gave me some Stanadyne fuel treatment. It seemed to quiet it down but, it took a double dose, and that stuff is not cheap.

I decided to try Seafoam, because everyone on this forum claims it to be liquid gold. I don't think it will eliminate my fuel knock but if there is any water setting on the return side it should push it through. Funny, is that, of course, diesels produce no vacuum so you have to dump it directly into the intake manifold. I just removed the harmonic balancer and it gave me direct feed into the intake manifold. Many people say on gassers that it immediately kills the motor. The DMax acts like a little kid who just got a shot of kool aid. It just reved up for a second or so and then returned to idle speed. I dumped the other 2/3 of the bottle in the crankcase as instructed. After 5 minutes of shut-down, I fired it back up and not an ounce of blue smoke exited the exhaust.

After I run this tank, I will post any mileage/noise results.

[markw8]

Where did you get the idea that ULSD has no lubricating property?

 

Mark.

[Shawn T]

Where did you get the idea that ULSD has no lubricating property?

 

Mark.

 

 

Sulfur is a natural fuel lubricant. I work in the fossil fuel industry and I know this for a fact. Here is just one example of an explanation. Google it, you'll find thousands. Idea?

 

http://en.wikipedia.org/wiki/Lubricant

[markw8]

If you read current information that details the various fuels, older high-sulfer, low-sulfer(500ppm) and ulsd (15ppm) you'll find other additives that aid lubrcation in place of sulfer. To my knowledge GM has always said the D-max never needs fuel additives. I also can't see how a product that says it can be used that many ways, can be good at any of them.

 

Mark.

[fcknmaw]

I also can't see how a product that says it can be used that many ways, can be good at any of them.

 

WD40?

[Black02Silverado]

SeaFoam has been around a long time. Did it take care of your problem?

[deerchooper]

hope it helps ya.

 

i just dumped a can in it today as well.

[grose67]

I also can't see how a product that says it can be used that many ways, can be good at any of them.

 

WD40?

 

 

KY Jelly

[fcknmaw]

I also can't see how a product that says it can be used that many ways, can be good at any of them.

 

WD40?

 

 

KY Jelly

 

 

INDEED!!!!

[ddbck]

I used a can in the tank, but I was a little hesitant to do any thing else with it. Not sure if it made a difference or not. I'm sure it cleaned some crap out.

[Shawn T]

If you read current information that details the various fuels, older high-sulfer, low-sulfer(500ppm) and ulsd (15ppm) you'll find other additives that aid lubrcation in place of sulfer. To my knowledge GM has always said the D-max never needs fuel additives. I also can't see how a product that says it can be used that many ways, can be good at any of them.

 

Mark.

Mark,

You asked me the question, "where did you get the idea that sulfur is a lubricant?". I answered that for you. GM is basing no fuel additives on good conditioned, water and detergent free, diesel. Here in Colorado, heavy amounts of detergents are added in winter time to work as an anti-gel and stabilizer. The problem is that the BTU value of the fuel suffers. Your right, GM does not recommend a fuel additive, they only recommend their service schedule, which is outlandish and a waste of money. A GM duramax mechanic recommended Standayne to me and I did see results. I would be willing to take a professional's word if he saw repeatable results. Don't rob the thread with your opinions, Seafoam has worked for many on here; do a search.

To you others that actually are interested in wether it worked or not, I will have to run the tank empty and let you know!

[ColoradoSkiCountry]

I would assume that GM would take into account that there may need to be additives the owners have to put into the fuel tank of their Diesels to prevent fuel gel in very cold temps... Seafoam is a great product to use for that.

[dewfpo]

Many people say on gassers that it immediately kills the motor. The DMax acts like a little kid who just got a shot of kool aid. It just reved up for a second or so and then returned to idle speed.

 

The reason for this is because, unlike a gas engine, the air intake is wide open and not throttled on a diesel. You control engine rpm in a diesel by controlling the amount of fuel just like you did by pouring in the seafoam. You added more fuel, there was plenty of combustion air available so the rpm went up until the seafoam was used up.

 

DEWFPO

[Shawn T]

Many people say on gassers that it immediately kills the motor. The DMax acts like a little kid who just got a shot of kool aid. It just reved up for a second or so and then returned to idle speed.

 

The reason for this is because, unlike a gas engine, the air intake is wide open and not throttled on a diesel. You control engine rpm in a diesel by controlling the amount of fuel just like you did by pouring in the seafoam. You added more fuel, there was plenty of combustion air available so the rpm went up until the seafoam was used up.

 

DEWFPO

 

 

 

DEWFPO,

Thank makes total sense. I drove it to work this morning because I want to burn this tank out of it quickly to get the system fully treated. It sounds like a diesel pretty much burns the SeaFoam away before it has a chance to clean the top end. Oh well, it has the other 2/3's of the bottle in the crank case and I'm due for an oil change.