When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I need some thoughts on this one, at high RPM at WOT the car starts smoking white/grey and after a hard drive you see oil/gasoline marks all over the back of my z06. Also i need to fill it with oil frequently.
I took the intake of (MSD ATOMIC airforce) its like full of oil.(Pictures)
I took the heads of noticed some clearence in the intake guides nothing on the exhaust side. New bronze sleeves put in on intake side and new seals.
I took a feel on the pistons some rocking at top but didnt think it was too bad.
Put it all together again and still the same smoking and oil consumption of course.
Did a Leakdown test before on a COLD ENGINE was getting between 10-18%
My thoughts:
1. Oil separators are needed, because of the higher intake flow the oil is forced from the dry sump tank into the intake. (ordered Elite engineering cans.)
2. The car has a too rich fuel mixture! (new tune needed)
3. The pistonrings cant hold the pressure at WOT and high RPM.
(new rings/pistons needed)
4. Is it Normal?
Setup on the car:
Lingenfelter GT-21 cam (high lift)
Ferrera valvespring kit for that cam
Rocker Arm Trunnion Upgrade
102mm Nick williams
Halltech air intake
MSD atomic airforce intake manifold
Pfadt Headers
Borla Atak exhaust
This setup got 680hp on the dyno.
Now Sweden need some help from you guys "Over there" feel free to write your ideas and i appreciate every answer!
Definitely not normal. But I think I know what is going on. Did you use Teflon or RTV sealant on the rocker arm bolts? The bolt holes for the intake rocker arms go into the intake runner. This could cause excessive oil in the intake and to pass through the engine out the exhaust.
I did use blue Loctite for the bolts, think thats the problem?
!! Looking at it right now and unscrewed one of the rocker arms, looks like its a "stop" down in the thread. So the oil cant go out that way?
Is that picture of an intake rocker arm or an exhaust rocker? Typically on ported heads, its the intake bolt hole that gets exposed to the ports. And it is possible that the bolt holes won't be exposed on every one of them.
I would take off all the rocker arms, use a good RTV sealant, re-install, and check oil consumption.
The chance of an intake oil leak is easy to determine, just watch the exhaust at the time of throttle "lift" for Blue Colour
Not stated in your observation.
The stated observation of oil film, gray/black smoke at WOT is a result of rings passing oil.
There could be a leak though that result would be oil film only, not smoke from the exhaust pipes as stated.
The cause could be the tune, too much spark advance.
My question is about your Spark Instant at WOT, max RPM.
What is that value ?
Spark plug heat range?
Fuel octane, though in Sweden it is high ?
YES, too Rich at WOT though you would be down on power.
I need some thoughts on this one, at high RPM at WOT the car starts smoking white/grey and after a hard drive you see oil/gasoline marks all over the back of my z06. Also i need to fill it with oil frequently.
I took the intake of (MSD ATOMIC airforce) its like full of oil.(Pictures)
I took the heads of noticed some clearence in the intake guides nothing on the exhaust side. New bronze sleeves put in on intake side and new seals.
I took a feel on the pistons some rocking at top but didnt think it was too bad.
Put it all together again and still the same smoking and oil consumption of course.
Did a Leakdown test before on a COLD ENGINE was getting between 10-18%
My thoughts:
1. Oil separators are needed, because of the higher intake flow the oil is forced from the dry sump tank into the intake. (ordered Elite engineering cans.)
2. The car has a too rich fuel mixture! (new tune needed)
3. The pistonrings cant hold the pressure at WOT and high RPM.
(new rings/pistons needed)
4. Is it Normal?
Setup on the car:
Lingenfelter GT-21 cam (high lift)
Ferrera valvespring kit for that cam
Rocker Arm Trunnion Upgrade
102mm Nick williams
Halltech air intake
MSD atomic airforce intake manifold
Pfadt Headers
Borla Atak exhaust
This setup got 680hp on the dyno.
Now Sweden need some help from you guys "Over there" feel free to write your ideas and i appreciate every answer!
Did you ever find a solution for this? My 09 z06 having the same issue on track days. Consuming oil and coating my back bumper.
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
LS7 Drinking oil 
