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MnTom · 09-21-2015, 06:35 PM

Quote:

Originally Posted by kidoo

I went for a road test.

1. It will start to smoke only after idling for a couple of minutes, then if I go, it puff a little then it clears up and even if I slow down and stop at a light, it does not smoke.
2. On the road, I do not see any of that smoke, going slow or fast.
3. The smoke is kind of gray / drak gray, maybe a little bluish.

Would it be a valve seat or injector leaking at iddle?

That could be an injector dribbling or even a rail pressure control not holding pressure at an idle. Once the pump rpm comes up it can pump more.

DMTTRANSPORT · 09-21-2015, 06:59 PM

Quote:

Originally Posted by kidoo

I will recheck it, thanks for the info. BTW, how come there is pressure in the tank when the tube is open to atmosphere?? How does it work?

If there is excessive pressure, back to the Head Gasket or Cracked Liner...

kidoo · 09-21-2015, 07:33 PM

Quote:

Originally Posted by MnTom

Pressure is from heating the liquid. The reason there is pressure is because of the cap on the tank. It has a spring holding a rubber seal to hold pressure. Pressure also causes the boiling point to rise otherwise you would have a lot more over heating.

Yes, I got this part. But how would you get bubble if you use the overflow tube in a glass of water, the cap is preventing the pressure / air to go out isn'it?

I seen a video in you tube showing the bubble but using a rubber cap and a tube from the tank filling hole.

https://www.youtube.com/watch?v=eoi4h8EZPr8

kidoo · 09-22-2015, 08:35 AM

Ok, I did a bubble test. First, with the reservoir cap installed, engine was warm but not at top operation temp, did not see any bubble from the overflow tube. I will recheck when the engine is up to operating temp.

Then I did the test with reservoir cap removed but just blocking the opening with a rubber car and overflow tube in a glass of water, then I see bubble. I think there should be bubbles as the coolant temperature rises and pressure is building up, that pressure got to go somwhere so it goes through the tube, in the water.

I tried it on my truck, Ford diesel, and same happened, bubble with cap off.

To mention, I flushed my antifreeze and there was not a trace of oil in it.

Smitty77 · 09-22-2015, 10:51 AM

Suppose it could also be a turbo seal going out. Looking at smoke color can be confusing, based upon lots of factors

...

I get a puff of smoke after idle, mine 'appears' to be dark/black, which too me makes me think it's excess fuel...

Good luck!!! And let us know what you find out!
Smitty

kidoo · 09-22-2015, 11:05 AM

I will sure follow. I checked the engine oil cap, no sign of milky stuff at all. The oil on the dip stick is oil only and it did not go down on the last 1000 miles so far.

I did not check the turbo yet.

kidoo · 09-23-2015, 03:31 PM

This is pretty well how mine does, same color, not as thick.

https://www.youtube.com/watch?v=wj0uAvBgYoA

kidoo · 09-23-2015, 03:33 PM

Just about like this one

https://www.youtube.com/watch?v=-CE3xZ3VAME

DMTTRANSPORT · 09-23-2015, 04:23 PM

You get the bubbles from the pressure created by compression working its way into the head gasket, white exhaust is caused from the coolant that worked its way into the cylinders while sitting, the milk shake you see on the oil filler cap is not good (water & oil) could be a liner seal also causing the white (ish) exhaust.

kidoo · 09-27-2015, 03:23 PM

I added a double dose of Diesel Kleen and went for a 50 miles trip, stopping 2 days overnight. I now do not see much fumes at the exhaust, on start up or after warm up.

I am going on a 600 miles trip in two weeks, I will report on the result.