Hi Guys,

sorry for my (maybe) crazy question. Im german.

My 99 Z28 with near 100.000km needs last time more oil then in further times. Ive read about that PCV-Valve and im wondering because the rubberpipe that connect to the throttle body gets a hole last week and i replace that thing. Now i ask myself what does the PCV-Valve!?

Can anyone tell me that. Can this be the reason for my problem (more using oil)?
My oilusing is around 1 Liter at 4000km.


An other question: I go every 10.000km to Oilchange. Mobil 1 - 5W30.
When i drive the car, the Oil-Pressure-Gauge shows the first 6.000km the middle at idle and 2/3 or more when i hit the gas. After that 6.000km, the pressure is slow going down and at 10.000km i loose close a 1/3. At cold engine not so much like at arm engine. That means i start at idle at 1/3 Gauge and when i hit the gas it goes to the half or a bit over.

Is that a known problem?


My last problem i post some months ago. At the autobahn my serpentine belt jumps of the pullys and my engine was going overheating. After that i grease my bearings and install gaterback-belts. No problems after that.
Now after close a half year later i fear, that in future crack my head gasket. Here in germany i sit on a lonely position ...
At my engine-oil-cap ive a little bit creamy stuff, not much. Looks like condensation. I only drive 10km to work every morning... At the oil dipstick i not have any other things like oil.
So how i can separate what condensate is and when i have coolant in my oil? The same question other way: How i can see if are oil in my coolant?
At google ive found only a bit pictures but i aks what situation is typical for the LS1 first?


Aaaand last Problem... Ive buyd last year new spark plugs and put it in my garage... till today. My camaro has inside the factory plugs since 103.000km, so i need to change but ive forget to order new plug wires . Are new plug wires needed?

Thx for help.

 

First, no problem with the language barrier. I lived in Germany for Two years, and I have pure German ancestry. -My last name, Bayer.

Anyway: The early LS1s have a PCV Issue where they suck in a lot of oil. My buddy's 2000 Vette has the same problem. You can replace the PCV Valve, next to the throttle body. But the real solution would be

A: Convert to the LS6 Style PCV System, it moves the PCV intake from the splash area of the valve cover to the Cam valley underneath the intake.

http://www.thunderracing.com/catalog...vid=3&pcid=287

B: Install a "Catch Can" between the vacuum line and the intake to catch the oil that is being sucked in..


But Cheap and easy first, take some solvent cleaner to your throttle body and clean the plate and the passages off really good.

The early LS1 engines didn't have the greatest oil pump system. and , yes, it's a known ISSUE, but can become a problem. Replacing the oil pump could be in your future. I know your emissions are very strict, so I doubta heads and cam modification would be in your future. -While you are in there, the oil pump is typically replaced.

The blown head gasket is why you would have leaked coolant into the oil. You're lucky it didn't do any further damage. That is why you would have that frothy/milky evidence in your valve cover or under your oil fill cap. Just run a good engine flush or Seafoam through there to clear it up.


The factory wires are fine... Nothing wrong with them.. Keep them untill they start becoming a problem..

 

Hi and thanks for your help.
I hope you like youre german ancestry

Yesterday ive change the oil and we found no coolant in the oil, so im more happy now. The little bit creamy yellow stuff at the Oil-Cap would be condensate from my 8km "to the work" driveway every day.

The coolant looks good, no oil inside. We check too.

For me will be interest what situation on the LS1 comes first (when it comes). When the head gasket is going, what will be the typical situation first? Remember ive a 99 Z28. I must ask so crazy because here in germany no one can tell me that and in this forum with the search option ive found so much different situations...

Thanks with your tip on the PCV system. Next order from the USA ill buy that.
At the weekend i will clean up my airsystem.


What new oilpump you think are good to replace the stock one. I read many about "portet LS6" but can this pump replace the stock one?


The wires, thanks for the tipp, i let the original ones installed.

 

Thanx, It's a bit of pride for me..

So, you didn't change the head gasket already? If there's no coolant in your oil, you should be fine then. Unless you notice a drop in performance, or your coolant level is gradually dropping (burning it).

oil pumps, yes a ported LS6 is fine..

I have this one in my Z28: (top one)
http://www.thunderracing.com/catalog...&vid=3&pcid=83

 

Just getting rid of the vaccum line to the throttle body will stop a lot of oil consumption too. Splice it into one of the other lines off the valve cover and cap it on the throttle body.

-Geoff

 

Hey thank you guys for help.

@Bayer Z28: Yes, no coolant in my oil and head gasket isnt changed. Are somere an tutorial out there where i can see who to change that?

 

^ Basically, this:
http://www.ls1howto.com/index.php?article=3

You may not need a head gasket. If your drive to and from work is short, it may just be the condensation from the drive, but keep an eye on it for a while before you go tearing the engine apart.