Lube Oil User

[ackermanN]

I am a new owner of a used 2005 5. 9L 6spd man, quad cab 2x4 3500

It has 105600 miles no mods. It is using about a gallon of lube oil

every 500 miles. I had it in for repair and the dealer installed a new

rear main seal but it is still using. I see signs of a leak on the tail gate.

Unit runs very well, gets about 18 (hand calc) and has plenty of get

up and go. Any ideas on what could cause the rear main seal to go?

Or how I find out where it is going? I do not see smoke unless I am

kicking in the turbo to pass (or just for the fun of it)

 

[JCasper]

Fill in your sig when you get some time.



Is the tailpipe oily? I wonder if the turbo is leaking bad.



Do you see oil anywhere underneath besides the rear main?

 

[ackermanN]

I filled it in but I do not know why it did not display. I do not see
signs of dripping on the ground. I will check the tail pipe tonight.

 

[ackermanN]

Oh and thank you. Forgot my manners.

 

[roperteacher]

If your using a gallon every 500 miles then you should be able to see LOTS of oil under it coming from some place. CK the blow by tube as well

 

[MMeier]

Pop the air inlet tube off the front of the turbo, that should shed some light quickly, if its wet in there.

 

[ackermanN]

OK, I checked the tail pipe and it just has a lot of carbon soot.
It does not look or feel moist. No oil on ground where I park.
Will check blowby tube next. Thank you all for the suggestions.

 

[roperteacher]

That is weird that it is "Using" it or burning it... Interesting. .

 

[CDonaldson]

No visible oil anywhere to amount to anything suggests it's burning it. Could be rings, blow-by, they don't call a diesel an oil burner for nothing. Even oil in anti-freeze would suggest a blown head gasket but usually you see anti-freeze in an oil sample early on, long before you would see oil in the anti-freeze. A gallon is an aweful lot not to have other signs.



CD

 

[AKAMAC]

I'd suspect the turbo. With the residue on the tailgate and smoke on acceleration w/o mods; bad shaft seal.

Just a guess.

 

[Johnstra]

Won't a bad shaft seal pressurize the heck out of the crankcase? Pull your oil cap off while it's running and see how much blowby you have. Could be real blowby or something else pressurizing the crankcase.

-john

 

[ackermanN]

Thank you all for the ideas. I did finally notice blue smoke coming from
the tail pipe last night while headlights from car behind were close. I
also notice that my rear bumper, on the corner is blue, like a chrome header
pipe on an older Harley before heat shields. I was wondering if something
was mis-behaving enough to cause very high EGT's under load. Does anything control boost besides my foot?

 

[Cattletrkr]

Being able to see theexhaust with a car behind you is normal. It's a sort of optical illusion. It's never as bad as it looks at night. However, a blue fender or bumper is definently odd.

 

[betterthanstock]

With a warmed up engine, rev it to 3500 rpm and hold it there for 30 seconds.

It won't hurt it.

Does it smoke? Is there oil on the pavement? That oil has got to go somewhere!!

 

[WNowlan]

Is the dip stick reading correctly? If you go 750 miles is it down 1. 5? How much oil did you put in when you changed. It holds 3 gallons. That is a whole lot of oil in 500 miles. You would have to see visible signs of that much.

 

[r Hollander]

R Hollander

Check the turbo pipes where it goes into the intake for oil.



On my 92 the turbo leaked oil into the inter cooler it would

smoke when hammered .

 

[ackermanN]

Just got a call from the shop and they say it needs a new turbo and
the intercooler and pipes cleaned out.

 

[MMeier]

Being able to see theexhaust with a car behind you is normal. It's a sort of optical illusion. It's never as bad as it looks at night.

... . unless of course the headlites of the car behind you seem to go dim when you take off!!!:-laf

 

[Cattletrkr]

... . unless of course the headlites of the car behind you seem to go dim when you take off!!!:-laf

I would guess that's "normal" for at least 1/3 of TDR members.