WMO observations on a 97 PSD...

[Greenbeast6.9]

Well i have been chasing down a HPOP leak and i still cannot find it, but upon removal of the injectors i found that the tips were blocked and had a lot of carbon on them. I would assume this is from my 50% WMO mix. I have been running it this way for about two months. This does not mean that this happens to every ones injectors, but I thought i would share. I am going to continue to run a WMO mix, but this time I am going to go with an additive to see if I can get rid of the carbon. Let me know if you all have any ideas.


On another note i found that one injector bore has a little bit of antifreeze sitting in the bottom of the hole. What could this be caused by? The injector also had some surface rust on it. Could it be cracked and exposed to a water jacket?

 

[sassyrel]

put water mist injection on it--it will steam clean things inside as it runs--have it come on with boost---

 

[Russ]

Are you cold starting on the 50/50 mix, or starting on diesel, then switching to the 50/50 mix after warm up?

 

[Greenbeast6.9]

Cold starting, with no start issues. The water mist is a good thought!

 

[trackspeeder]

A leaky injector cup will allow antifreeze to seep into the hole.

 

[Russ]

Cold starting,

I think that maybe the cause. Try letting it warm up before switching over. And switch back before shutting down. Then take another look.

 

[Double-S-Diesel]

the antifreeze is a leaky injector cup.
as for the carbon build up that could also be caused by a bad injectors, Ive see that on straight diesel trucks

FWIW I just pulled the injectors on my 95 which is running 2/3 wvo and the injectors were covered with carbon but not all the same. I know the injctors were bad though

 

[RKOCH]

Yes that is a leaking cup and should be fixed.

 

[Greenbeast6.9]

How would i fix it?

 

[Mike]

How would i fix it?

You have to replace the cup.

 

[RKOCH]

You need a cup puller and installer. It has a big tap that threads it then a puller screws in it and you screw a slide hammer in that and pop pop and it pops out. Then you put the new one on the installer cover it in locktite and smack it in with a hammer till it bottoms.

 

[subway]

i know WMO has a probability of causing carbon build up but unless you knew they were fine before how do we know if it truly was the WMO. like Nick says it can happen with diesel. i know we would all like to know but i hate to condemn the WMO just yet.

 

[Mike]

Here is what my injectors looked like when I pulled them @ 145,000 miles. This was straight #2 being run through them. Old injector on left, new rebuilt on right.

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Here is one bank of glow plugs that were removed at the same time.

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So, compared to the ones that have had WMO squirted through them mine look pretty new. But the real test would be to clean up your injectors and stick them back in and check again in 15 or 20K miles.

 

[Greenbeast6.9]

I had these same injectors out 1 year ago, about 12,000miles ago and they looked fine then.

 

[subway]

i am not really arguing that its not the WMO in fact it is something i am worried about and suspect can happen. it seems the same can happen running WVO that is not up to temp. since you had them out a year ago thats not really good news but it is important to know.

maybe heat should be mandatory or a water injection system to steam clean it out.