Blowing white/light gray smoke

[dits145]

Towed my 5th wheel 320 miles yesterday. Truck ran great. No issues whatsoever. Plugged the truck in over night. Started and idled like normal this morning. Let it warm up for a little while. When I took off (not towing anymore) I noticed it blowing the white/light gray smoke.
When I turn the truck off I can hear a hissing for a few seconds in the lower driver side front of the truck, possibly the intercooler boot. Would a leak there cause that smoke?

 

[Dozerboy]

Not likely for an boost leak to cause whitish smoke. Plus there should be much if any pressure durring shut down. You can pressurized intake system to check for leaks but you might be looking at an injector head gasket issue.

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

[NC-smokinlmm]

Egr deleted?

 

[dits145]

It is deleted. Trying to add info in a signature

 

[dits145]

Truck runs and idles good. Coolant reservoir is clean as well as the coolant. Oil is clean with no signs of moister in it. Upper radiator hose isn't hard. No odd noises. Pulled off the oil cap. Was an initial burst of pressure, but no smoke. Injector balance rates look good. Is there anything I haven't checked that I should?

Can't seem to get the signature to show, but truck has egr/dpf delete. pcv reroute, lly turbo with billet compressor and 10 blade turbine. Motor Ops tow tune. Merchant Automotive Maximum work series transmission. 3" down pipe to 4" exhaust. Raptor lift pump

 

[Novak]

Have you actually verified where the hissing sound is coming from?


Sent from my iPhone using Tapatalk

 

[dits145]

Just took it for a short drive again. Now I noticed there is oil coming out the exhaust and boost seems to be really slow at building. I did listen closer for the hiss and it sounds like its coming from the top drivers side around the valve cover.

 

[Novak]

Run it with your oil fill cap off again.


Sent from my iPhone using Tapatalk

 

[torqued2dmax]

I saw lly turbo , is it an lly or might you be dealing with a cracked piston on an lbz ? Is there alot of smoke comming out of your Pvc reroute ? and did you check for pressure at filler like Novak said yet ? We all hope its something small, Good luck !

 

[unionmax481]

sounds like your turbo is blowing oil out it (bad seal) or thrust washer went went bad. which also will cause oil out the exhaust. Been there done that

 

[dits145]

Truck is an LMM with the LLY turbo. Sorry! I still haven't figured out why my signature isn't coming up.

 

[LBZ]

Does it have a pcv reroute done on it?

 

[Novak]

I saw lly turbo , is it an lly or might you be dealing with a cracked piston on an lbz ? Is there alot of smoke comming out of your Pvc reroute ? and did you check for pressure at filler like Novak said yet ? We all hope its something small, Good luck !

You can rebuild an LLY turbo with a 10 blade setup and throw them on an LBZ. They will actually hold a little more power than stock and sing like a 6.0 PSD

 

[dits145]

It does have pcv reroute. I just pulled the oil cap off again and still no smoke coming from there.

 

[unionmax481]

Pull the down pipe off the back of turbo see if there is oil in it and exhaust housing. Sounds like to me your blowing oil past the seals or if the oil drain is clogged it will push oil past the seals on the turbo exhaust side

 

[dits145]

After chatting with another member I have finally gotten this fixed. It was the pcv reroute. The hose was solid ice inside the last 8" of the hose. Got it broken up, cleaned out, and a different route, and now back to running like it should. Thanks to everyone for your replies. All help is always greatly appreciated!

 

[Dozerboy]

Your probably the 5 or 6 guy I heard of this happening to in the last 2 weeks. One guy took out a main seal he thinks. How did you have your hose routed that it was a problem?

So many guys recommend reroutes on stockish trucks then things like this happen, because guys don't know any better.

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

[torqued2dmax]

Three posts on here mentioned Pvc reroute , Im glad it was something small !