How bad is this blow by

[Evan]

Been noticing mist or smoke in the headlights.

Yes I yanked the bottle off long ago.

 

Hoping valve seals is all. It doesnt use any coolant still runs the same also doesnt use oil. 

I am 1/4" over the hash mark on the dipstick but I doubt that's it. But who knows.

Odometer reads 323k not sure I trust it. Never had more than a valve adjust. Is it time to upgrade the head?

 

Hoping its semi normal and I'm just noticing since about 90% of my driving is in the dark right now. This is first year in about 8 that I've used her for work.

 

[98whitelightnin]

Night and cold always make it look worse than it is. If it isnt using oil, id say your good to go.

[Evan]

Thank you. I'll watch it and run it

[Dieselfuture]

Get the vent mode done, then check for vacuum leaks

[Tractorman]

@Dieselfuture is right on here.  Vacuum leaks are easy to overlook.  The vacuum pumps are strong on these trucks and can easily overcome a significant leak and the leak will go by unnoticed.  Even the HVAC controls will still work.  Remember any air that leaks into a vacuum line will discharge that same air into the crankcase via the vacuum pump outlet.

 

@Evan, my truck has about the same miles as yours and two times now I had noticed excessive vapors coming from the crankcase vent and both time it was caused from vacuum leaks. 

 

- John

[Evan]

Thanks. I'll check it out for vacumn leaks. And look into vent mod

[01cummins4ever]

I agree with the above too, those vacuum lines are easy to knock loose, especially if you have had your hands near them, done it myself, the one that comes off vac pump and didn’t know until blow by was blowing out like a freight train. 

[Evan]

Put my driveline on so I yanked the tcase into gear and no 4wd indicator on the dash.

Mines a 02 non cad so no vacumn actuator in front axle. But it got me thinking more on replies here and if I have a vacumn line off.

 

Sure as chit one of lines coming from under the drivers battery was off. I hooked it back up. Still no 4x4 indicator but blow by was reduced a ton. Or appears to be reduced also thinking truck is running  better that's probably just in my head.

 

The 90deg rubber boot coming off the vacuum pump looks shriveled and sad I should replace it.

 

Thanks for help and not telling me my truck needs a head rebuild 

[kzimmer]

Well now you've got me thinking that I should go find my vacuum tester and find some leaks.

 

BTW your sig is hilarious. Every time the temperature dips below -20°C I'm like "Please  ******* start."

[IBMobile]

2 hours ago, Evan said:

The 90deg rubber boot coming off the vacuum pump looks shriveled and sad I should replace it.

I found a piece of vacuum hose that fits just right; just cut it a little longer to make the 90° turn.  You probably have a piece laying around.  

[Dieselfuture]

57 minutes ago, IBMobile said:

I found a piece of vacuum hose that fits just right; just cut it a little longer to make the 90° turn.  You probably have a piece laying around.  

I also used a pice of rubber hose longer then 90 and route it so it doesnt kink

[dripley]

2 hours ago, Dieselfuture said:

I also used a pice of rubber hose longer then 90 and route it so it doesnt kink

Same here.

[Mopar1973Man]

Be better to re-do all the vacuum lines with air brake line and fresh vacuum hose rubber. I'm sure there is way better routing that could be done. It doesn't have to be routed through the middle of everything. No it does not have to run along the cowl either.