Ok last night while really gettting on my truck the dip stick blewout. I have both valve covers vented with small filters on top of the vent ports. It seems if i hit full boost after last night blows the dip stick out. It did it again to day. I changed the o ring on the dip stick to see if that helps. Still seems kinda easy to come out. Is there a cure for this or did I screw something up. This happened once also when the valve covers were not vented yet also. Thanks for the help.
Last edited by SLO TRUCK; 08-11-2009 at 09:25 AM.
Name: Mark,
God created turbo lag so nitrous trucks could have a chance.
http://www.ls1truck.com/forums/my-ga...tml#post274877
do you have a catch can?
This is blow-by past your piston rings causing this.
Not much you can do about it.
Racer's use crank case vacuum pumps, but they not very street friendly components
and tend to have high rebuild rates.
It's not a good sign either. ..........
2002 Tahoe 4.8 - soon to be turbo'd - SOLD
1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
2012 Raptor - 497rwhp at 10psi
If you aint breaking - you aint going fast enough
Originally Posted by r.barn
x2
2013 CC 5.3
81 C10 LS1 project
coming out the dip stick is, past the piston rings? i thought that would be when it came out of the valve covers.
I dont have a catch can set up. Would that make any difference since it's coming out the dip stick? As stated both valve covers are vented.
Guess it's time to go easy one it for the next month since i am in Louisiana at work running around in ti constantly. SO is this the end of my lil engine?
Name: Mark,
God created turbo lag so nitrous trucks could have a chance.
http://www.ls1truck.com/forums/my-ga...tml#post274877
take your oil cap off and put a filter on that, i had the same prob...the little vac lines on the valve covers weren't nearly enough
2006 silverado SS....Clifford Jr...turbo coming soon
1970 Chevelle ly6 swap....d1 coming soon
Valve cover breathers cant keep up.
Pressure has to work thru entire engine up to breathers where as
dipstick tube goes right down into crank case.
If it was pushing out dipstick in N/A form before valve cover vents
then its been around for a while.
It's not the end of you engine, but it is the beginning of the end.
I'd start planning for a short block rebuild in near future.
Only thing that will help right now is to seal valve cover breathers and put
a crank case vacuum pump on to put a positive vacuum on the crank case
at all times. This will suck out the blow-by before it builds pressure.
I wrestled with this on my 5.8L mustang ... on brand new engine no less
and finally just had to take it apart and re-ring and re-hone the cylinders.
2002 Tahoe 4.8 - soon to be turbo'd - SOLD
1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
2012 Raptor - 497rwhp at 10psi
If you aint breaking - you aint going fast enough
ol lucky #7......
single digit street truck
for build info
http://www.ls1truck.com/forums/my-ga...cs-garage.html
The best advice I have ever heard:... Only take B( . Y . )ST advice from someone that is CURRENTLY running a turbo setup close to, or bigger than what you want......
Might not need complete rebuild. Honing, new rings and bearings might be
enough, but you never know until open her up and see what you have.
We never could figure out why my Windsor did it. But you could definitely
see it on (2) cylinder walls where the rings hadn't seated properly for whatever
reason.
2002 Tahoe 4.8 - soon to be turbo'd - SOLD
1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
2012 Raptor - 497rwhp at 10psi
If you aint breaking - you aint going fast enough
Same thing was happening to mine when I cracked a ringland on #7....
Doesn't sound good...
I would do a compression check ASAP and see if there's an issue. If it comes apart it will do more damage than a honing will fix...
2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive
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