Oil out of dipstick - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 1Likes
  • 1 Post By SilverGorillaLML
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 11-16-2019, 10:52 AM Thread Starter
 
Join Date: Sep 2019
Posts: 3
Oil out of dipstick

Bought truck earlier this year its a 2001 gmc 2500hd LB7. Few weeks after buying it started blowing heavy white smoke from the pcv vent. I put seafoam in the fuel filter and double dosed my fuel with howes and it went away.

A couple of months later i was hit with mystery limp had a new pump put in didnt solve the problem, continued to have hard starts while warm. Changed the oil and had 20L of oil so i assume an injector is leaking.

Today, a month after changing the oil i have noticed oil leaking back out of the pcv vent tube and when i removed the dipstick oil splashed rapidly out of the tube. This never happened last time i had the pcv vent problem.

Any suggestions? It is very cold outside, could this lead to a problem?

Thanks.
Monsiep is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 11-16-2019, 02:50 PM
Junior Member
 
Join Date: Oct 2018
Location: Calgary Alberta
Posts: 151
Could it be your injector(s) are so bad that your crank case is filled to the teats with fuel? Or the return lines?

I would assume that a 50/50 mix of fuel and oil in your crank case has wreaked havoc on the internals unfortunately. Oil analysis stat!

Sent from my google machine

"Stinky Pig"
2003 Sierra 2500 Crew 4x4–Charcoal Grey Metallic
325k kms and counting
LLY Head swap
LBZ full intake w/MP
Flo-Pro Downpipe
4" Straight pipe
EGR delete
PCV Re-route
EFI Live (E. Stock/30HP/60HP Tow/high idle/No start)
Edge CTS2 with EGT
AxysAssault is offline  
post #3 of 6 (permalink) Old 11-16-2019, 11:28 PM
DuramaxForum Fanatic
 
SilverGorillaLML's Avatar
 
Join Date: Feb 2015
Location: The mountains of va/wva listen for the banjos
Posts: 9,631
Drip some oil off the dipstick onto a paper towel. It will form a halo if it has fuel in it. If it has major blow by out the dip stick or oil fill tube next step is a compression check.
Attached Images
File Type: jpg images.jpeg-9.jpg (5.5 KB, 49 views)
407driver likes this.

Race/Pulling truck:2012 Cummins/Built 6.8L/Big air/Big fuel/48RE Swap/PCS 2000/B&M Gated shifter

Tow rig/DD 05 lly cclb loaded. Some goodies
SilverGorillaLML is online now  
Sponsored Links
Advertisement
 
post #4 of 6 (permalink) Old 11-17-2019, 03:21 PM
Duramax Forum Supporter
 
ALLY Cat's Avatar
 
Join Date: Nov 2009
Location: Indy OR 7S5
Posts: 3,172
Have you checked the PCV system? There should be a servicable PCV valve next to the alternator but I'm not real familiar with the gen 1 Duramaxes. IIRC there are PCV check valves on the valve covers also. If previous owner did a PCV reroute, there could be a clogged/pinched, ice block tube or plugged catch can. Worth taking a look....

2004.5 GMC SLT 4X4 CCLB LLY Ally, some mystery stuff, trans by Mike L, Magnaflow DP, Ride Rites, LBZ turbo inlet mod, AD II 165, po' man CAI, HIDs, stock height, Cognito tie rods, Bilstein 5100s, Isspros, H2 wheels with Toyo OC 285-70-17s, B&W turnover & Companion, Prodigy P3, dog snot on windows......


Sent from my antique HP DV7-4183cl with Radeon HD5470 graphics, Beats Audio and Blu-ray drive.....
ALLY Cat is online now  
post #5 of 6 (permalink) Old 11-18-2019, 08:02 PM
DuramaxForum n00b
 
Join Date: Oct 2019
Location: Az
Posts: 12
I would say injectors, dont know what else would cause it to make oil unless the fuel return line is leaking.

2019 Expedition
2005 C6
2003 Silverado LB7
1948 Jeep
LS1POWERED is offline  
post #6 of 6 (permalink) Old 11-18-2019, 10:54 PM
 
Join Date: Nov 2019
Posts: 5
pretty good video on an injector return leak.


Sent from my iPhone using Tapatalk
Rad24 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy and GMC Duramax Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome