368 LT5 Drinking oil

[Paul Workman]

Originally Posted by Mitsumark

...However the car has drank 2 qrts of Mobil 1 in the last 300 miles..It is absolutely oil as the oil light came on,the smoke is clearly Blue and it stinks to high heaven.If I blip the gas quickly 3-4 times back to back the smoke becomes heavier and heavier until I stop....

All these ideas...

Following along, but this happened more or less suddenly. And the tail pipe stinks... Does it smell like gasoline or smell rich, or does it if fact smell like oil? Does the oil on the dipstick smell of gasoline??

Reason i ask, you made some comments about it running poorly and hunting, etc. With the smell - especially if it were fuel smell - I'd be wanting to do a leak down test. If you have a leaking injector, then some fuel may be washing down into the crankcase diluting/thinning the oil considerably, AND it would likely cause some rough running AND some stinking exhaust...

Just a thought.

[Mitsumark]

Compression test results..Don't know if these are good #s on an LT5..It was done with engine hot, all plugs removed,TB wide open..Each # represents that cylinder..

1.261
2.258
3.265
4.265
5.260
6.261
7.258
8.255

Check was done at a local performance shop..They have no LT5 experience and the techs were all intrigued with the car and how the engine looked..I was speaking with the head tech and told him the history and what I did..He said it may be possible that I may have a stuck oil control ring or valve that is not.seating properly due to carbon buildup from the cold plugs,bad coil,and excessive idling..He said I would probably never talk to him again after this next statement..He suggested when it gets low on oil again to run a qt of Rislone through it for a few hundred miles..He swore up and down that he has witnessed it free sticky valves and rings..Driving around awhile after that today she is still faintly smoking at idle..Mostly on medium/hard gas..I also took notice that the smoke comes from both sides..The car is running Watson headers into a dual chamber resonator,then into a B&B Triflow exhaust..No X or H pipe..Tomorrow I'm changing oil and gonna pull every PCV related hose/pipe to look for blockages..I have heard someone here mention some kind of sponges in the PVC system that can become brittle,break, and even clog passages..If that is true, where are they?Also forgot to mention even the stock plugs were very carboned up after just being in for 800 miles..No wet oil seen on plugs.

[LGAFF]

That's pretty damn high....looks good to me

[Dynomite]

Originally Posted by Mitsumark

Compression test results..Don't know if these are good #s on an LT5..It was done with engine hot, all plugs removed,TB wide open..Each # represents that cylinder..

1.261
2.258
3.265
4.265
5.260
6.261
7.258
8.255

Check was done at a local performance shop..They have no LT5 experience and the techs were all intrigued with the car and how the engine looked..I was speaking with the head tech and told him the history and what I did..He said it may be possible that I may have a stuck oil control ring or valve that is not.seating properly due to carbon buildup from the cold plugs,bad coil,and excessive idling..He said I would probably never talk to him again after this next statement..He suggested when it gets low on oil again to run a qt of Rislone through it for a few hundred miles..He swore up and down that he has witnessed it free sticky valves and rings..Driving around awhile after that today she is still faintly smoking at idle..Mostly on medium/hard gas..I also took notice that the smoke comes from both sides..The car is running Watson headers into a dual chamber resonator,then into a B&B Triflow exhaust..No X or H pipe..Tomorrow I'm changing oil and gonna pull every PCV related hose/pipe to look for blockages..I have heard someone here mention some kind of sponges in the PVC system that can become brittle,break, and even clog passages..If that is true, where are they?Also forgot to mention even the stock plugs were very carboned up after just being in for 800 miles..No wet oil seen on plugs.

Your compression is nice and even and high
Must have plained the heads......

The sponges are in the cam cover breathers which vent through the Air Horn...Marc Haibeck has them.

Cam Covers (Filters and Wear Strips)

Cam Cover Filters

[Mitsumark]

Dyno-Forgive my ignorance..Cam cover?Are you referring to the valve cover?If I'm looking at a valve cover above,you say that the filter goes where your pointing..Is that the part of the valve cover that faces the rear( closest to PCV)? If so, do these filters prevent large amounts of oil from entering the PCV system?If Im understanding this right,maybe mine are either missing or deteriorated enough to pull excessive amounts of oil through that area..Also,this car sat for the last 8 yrs before it was recently being used regularly again..

[Jagdpanzer]

Originally Posted by Mitsumark

Compression test results..Don't know if these are good #s on an LT5..It was done with engine hot, all plugs removed,TB wide open..Each # represents that cylinder..

1.261
2.258
3.265
4.265
5.260
6.261
7.258
8.255

Numbers look right for a 12:1 compression ratio motor.

[Kevin]

Originally Posted by Mitsumark

Dyno-Forgive my ignorance..Cam cover?Are you referring to the valve cover?If I'm looking at a valve cover above,you say that the filter goes where your pointing..Is that the part of the valve cover that faces the rear( closest to PCV)? If so, do these filters prevent large amounts of oil from entering the PCV system?If Im understanding this right,maybe mine are either missing or deteriorated enough to pull excessive amounts of oil through that area..Also,this car sat for the last 8 yrs before it was recently being used regularly again..

being as this is an OHC engine it doesn't have valve covers, but yes the covers that sit over the heads

[Schrade]

What's the spec squeeze ratio on stock mill? (I'm couchin' ATM )

[Mitsumark]

Kevin-I see your from PA..I bet you call those big sandwiches with the meat on them hoagies right? Lol.. Where Im from they're called subs..I was thrown off by Dynos "cam cover" reference as here in NJ,it's always referred to as valve cover regardless of it being pushrods,OHC,or whatever..Different states have different terms I guess..

[Dynomite]

Originally Posted by Mitsumark

Dyno-Forgive my ignorance..Cam cover?Are you referring to the valve cover?If I'm looking at a valve cover above,you say that the filter goes where your pointing..Is that the part of the valve cover that faces the rear( closest to PCV)? If so, do these filters prevent large amounts of oil from entering the PCV system?If Im understanding this right,maybe mine are either missing or deteriorated enough to pull excessive amounts of oil through that area..Also,this car sat for the last 8 yrs before it was recently being used regularly again..

Yes....as Kevin described.....the Cam Cover is what I show.
That filter goes inside the end of the Cam Cover towards the front.
You will see a Vent Tube inserted in the front top of the Cam Cover that directs vapors to the Air Horn which is what is connected to the Air Bellows (usually Black and corrugated). The other end of that Bellows is attached to the Air Filter Intake.

The Vent Tube is located on each side one in each Cam Cover. The Vent Tube extends up and under the Injector Housing Coolant Manifolds where it connects to a rubber hose...that rubber hose then connects to a port located on each side of the Air Horn.

These filters do get brittle and when removing them (there is a wire keeper) sometimes they will just crumble. Whenever you remove a Cam Cover ALWAYS replace the Cam Cover Filters. Also check the Chain guide located just in front of those filters located in the tops of Each Cam Cover.