Oil consumption problem

[dan juhasz]

I'm enjoying my 67 Coronet RT big time, but there was one hidden gremlin that was not shared with me. It almost burns as much oil as gas. This engine was supposedly rebuilt, I had the valve covers off and it's whistle clean, glyptal coated interior and adjustable roller rockers. That's about all I could see. When I changed out the plugs they looked like they had flakey oil deposits. If I jump on the gas it does push some blue. Here's my question, the valve covers have no baffling. Not sure if they are supposed to. I'm wondering if the pcv is just sucking oil in as I drive. What's your thoughts?
Ps, no leaks.

 

[mmissile]

smoking under a load? Sounds like a bad ring seal.

 

[lewtot184]

no baffle under a PCV valve will let the engine suck oil thru the PCV valve.

 

[dan juhasz]

no baffle under a PCV valve will let the engine suck oil thru the PCV valve.

So the chrome covers are supposed to have baffles?

 

[miller]

They should, to keep things right.

 

[lewtot184]

So the chrome covers are supposed to have baffles?

when using a PCV some type of a baffle is mandatory. some chrome covers have baffles, some don't.

 

[silversedan]

So the chrome covers are supposed to have baffles?

the factory chrome covers had baffles , someone might have taken them out cause of the roller rockers, there might have been a clearance problem

 

[Daves69]

Baffled pcv on one valve cover and breather cap on opposite valve cover.
Below may be an option............
http://www.ebay.com/itm/Chrome-Brea...ash=item2373ec10d1:g:Up4AAOSw0vBUe5Aw&vxp=mtr

 

[dan juhasz]

Baffled pcv on one valve cover and breather cap on opposite valve cover.
Below may be an option............
http://www.ebay.com/itm/Chrome-Brea...ash=item2373ec10d1:g:Up4AAOSw0vBUe5Aw&vxp=mtr

Less expensive than buying new covers and could help to prove a point, good idea thank you

 

[HEMI-ITIS]

Start by pulling the PVC and looking inside the line. Is it oil soaked?? When you inspected the plugs,were they equally gacked??

 

[dan juhasz]

Start by pulling the PVC and looking inside the line. Is it oil soaked?? When you inspected the plugs,were they equally gacked??

Plugs were uniform, no one or 2 cylinders indicated trouble, pcv hose by its nature won't swell so it's not going to give itself up.

 

[Ranger16]

If I jump on the gas it does push some blue.

"Jump on the gas" and vacuum drops to near zero. That should rule out PCV I would think.

 

[Dreamcatcher]

Another tell tail sign of bad seal at rings is get engine at temp. and pull the pvc out of the valve cover and the oil cap on the opposite side. At idle look to see how much blow by you have. If rings aren't sealed you will have blue smoke coming out. A little is common and ok but shouldn't be very much blowing past your rings.

 

[lewtot184]

even at low to no vacuum any oil residue will create smoke; especially if there's an oil build-up in the intake or port walls. to check the rings a cylinder leak down test will need to be performed. intake manifolds are notorious for leaking/sucking oil up thru the valley. a PCV test is easy; simply disconnect it. leaking intakes will show an oil ponding in the valley pan.

 

[dan juhasz]

I'm looking at AMD website at their concurs correct valve covers and pcv cap and oil cap. They show a small cap and spring clip that the pcv valve attach's to. Fine, does that clip hold it to valve cover with the small hole or the tube side? If the small hole side then how does it seal? It would be metal on metal? I don't get it and their phone sales tech was no help.

 

[dan juhasz]

Another tell tail sign of bad seal at rings is get engine at temp. and pull the pvc out of the valve cover and the oil cap on the opposite side. At idle look to see how much blow by you have. If rings aren't sealed you will have blue smoke coming out. A little is common and ok but shouldn't be very much blowing past your rings.

I don't think this engine has blow by issues, it uses a vent cap with a short hose to one of the air cleaner snorkels, there is no evidence of oil residue in the housing or on the filter.

 

[Dreamcatcher]

I don't think this engine has blow by issues, it uses a vent cap with a short hose to one of the air cleaner snorkels, there is no evidence of oil residue in the housing or on the filter.

Then it is either valve guides or like someone said going through the PVC because it does not have a baffle. With bad valve guides they usually smoke a bit at start up because of oil leaking down the valve stem. Usually just a little puff of smoke then clears right up.

 

[oldbee]

If you're not seeing out the exhaust all the time then a broken piston ring is probably not the cause. Valve seal,baffles on valve cover, or leaking intake gasket sucking oil from valley cover.??

 

[Rick Carson]

If it was valve seals or guides it would smoke heavy on decelleration when the vacuum is highest,I'm going with the no baffle theory.