Cat 953

[Nige]

Should I remove the inner filter thats inside of the big filter?

Temporarily, yes. You only have to run the engine for a couple of minutes.

As DB2 suggested above, make sure the inside of the air filter housing is clean before removing the inner filter to make the test.

 

[Bill1985]

Picture of the inner filters

 

[Nige]

Is that a ring of dust around the flange where the inner filter bolts into the housing.? Hard to see from the photo.



Go into the tube that leads from the filter housing to the engine with a clean (preferably white) rag and give the inside of it a good wipe. Any dust on the rag..?

 

[Bluox]

What did you find in the fuel filters?
Bob

 

[kshansen]

Have a couple questions about that inner filter.
First off why is it look so dark?

Second why are there twigs and stuff in there, see picture below I cropped out of the one posted:


One more question where abouts is this machine located? If it was running good then next time it was started it was smoking, what was the weather like in the time it was parked. Did it set out in a major rain storm with exhaust uncovered or something else?

 

[kshansen]

No it never smoked like this before it shut off, After I got it started it started smoking. So to answer you're question It did not smoke before it shut off on me

I just noticed this sentence so I highlighted it with red letters.
That maybe something that others might have missed also. Why did it shut off? What did you do to determine this problem? If this was mentioned some place different I missed it but it could be an important bit of information to know while working on the smoking problem!

 

[Dave Neubert]

If it happened suddenly my guess would be head gasket blown between 2 cylinders it will smoke pretty good I have seen many do this

 

[kshansen]

If it happened suddenly my guess would be head gasket blown between 2 cylinders it will smoke pretty good I have seen many do this

And I just went back and watched the video and there seems to be a lot of smoke coming out of the area by the turbo, muffler and piping looks odd too.

To be honest I have no experience with 3204 engines if that is what it is, but 3306 up to D399 are more my experience range, does not sound right even for a four cylinder! I'm thinking something more than a plugged air filter is going on here, but that needs to be checked out too !

 

[Cmark]

I'm not usually one for wild speculation but I'm going to say that a tip has fallen off an injector, just for the kudos if I happen to be right

 

[Bill1985]

Update: Smoke was the same and same noises

 

[Nige]

In that case my learned friend’s bet that a tip had fallen off an injector is probably not far off the mark.

BTW based on the condition of the air filter elements in the photo both of them need replacing. Kudos to KSH for spotting the poor condition of the secondary element. I’d say at some time the loader has been operated with the primary (outer) filter not installed, or there is a split in the filter somewhere that is letting dirt pass directly to the secondary element.

 

[Cmark]

And if it were my machine I would be updating to radial seal air filters.

 

[kshansen]

And if it were my machine I would be updating to radial seal air filters.

Yes, those bolt in "safety" filters are not the funniest ones to change, especially when the gasket pulls apart down in the housing or one of the studs break off!

 

[Bill1985]

Still no luck any more suggestions? Maybe bad turbo, injector??

 

[Bill1985]

And I just went back and watched the video and there seems to be a lot of smoke coming out of the area by the turbo, muffler and piping looks odd too.

To be honest I have no experience with 3204 engines if that is what it is, but 3306 up to D399 are more my experience range, does not sound right even for a four cylinder! I'm thinking something more than a plugged air filter is going on here, but that needs to be checked out too !

Thats just from a poor muffler job repair

 

[Nige]

Still no luck any more suggestions? Maybe bad turbo, injector??

A couple of questions first.

1. Need to clarify if the engine was running fine until it was shut down 4 weeks or so ago..? Was it shut down from the key at that time or did it stop on its own.?

2. Did you find any signs of dust in the air intake tube.? See post #23 above.

 

[kshansen]

A couple of questions first.

1. Need to clarify if the engine was running fine until it was shut down 4 weeks or so ago..? Was it shut down from the key at that time or did it stop on its own.?

2. Did you find any signs of dust in the air intake tube.? See post #23 above.

Yes, would be very helpful to have the rest of the story. It's always easy for the person dealing with a problem to forget we weren't there from the start.
We can only give suggestions on the information we are reading or seeing in the pictures posted.

Even things like the weather or the fact that the machine was being used at near sea level and now that it has been moved to someplace at 10,497 feet above sea level could be over looked in the post but very important for someone trying to diagnose a problem.

 

[Cmark]

Is it only me that hears a misfire/regular knock on the video? I would start by loosening the injection lines in turn and see if the noise changes.

 

[Bluox]

Is it only me that hears a misfire/regular knock on the video? I would start by loosening the injection lines in turn and see if the noise changes.

You mean like when you loosen the bad one the motor runs better?
Like when the fuel filters are full of water and the motor smokes like a pig?
Not no more than a couple of dozen times.
Bob

 

[fest777]

take cmark's advice crack the injectors one at a time you will find the bad cylinder, pull bad injector have it checked, also may have lost compression , try too check that, horror freight has a diesel test tool for less than $50.00