|
Re: where is my oil going?
[Re: NITROUSN]
#557969
12/19/09 11:07 PM
12/19/09 11:07 PM
|
Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
|
OP
master
Joined: Jul 2006
Posts: 4,179
California
|
Quote:
Spark plug tubes can cause oil consumption. They claim these work.
i have something similar.
|
|
|
Re: where is my oil going?
[Re: mickm]
#557970
12/19/09 11:17 PM
12/19/09 11:17 PM
|
Joined: Jan 2003
Posts: 18,432
UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 18,432
UPPER MICHIGAN, MARQUETTE COUN...
|
Quote:
Quote:
Spark plug tubes can cause oil consumption. They claim these work.
i have something similar.
That should take care of that issue. I would remove the pcv and vent from the covers. Plug one side cover start and run the engine. See if you have pressure or vacuum at the other cover. If vacuum you know the intake is still not sealing. There should be a small amount of positive pressure blow by gas. If there is a lot then you can be certain there is a ring sealing problem.
|
|
|
Re: where is my oil going?
[Re: NITROUSN]
#557971
12/20/09 01:17 AM
12/20/09 01:17 AM
|
Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
|
OP
master
Joined: Jul 2006
Posts: 4,179
California
|
Quote:
That should take care of that issue. I would remove the pcv and vent from the covers. Plug one side cover start and run the engine. See if you have pressure or vacuum at the other cover. If vacuum you know the intake is still not sealing. There should be a small amount of positive pressure blow by gas. If there is a lot then you can be certain there is a ring sealing problem.
i'll do that next time i start it, and pull the carb and look for oil in the passages, and report back.
|
|
|
Post deleted by Defbob
[Re: NITROUSN]
#557972
12/20/09 01:29 AM
12/20/09 01:29 AM
|
Anonymous
Unregistered
|
Anonymous
Unregistered
|
|
|
|
Re: where is my oil going?
#557973
12/20/09 02:40 AM
12/20/09 02:40 AM
|
Joined: Feb 2003
Posts: 10,350
Someplace you aren't
SomeCarGuy
I Live Here
|
I Live Here
Joined: Feb 2003
Posts: 10,350
Someplace you aren't
|
Anybody think 8-10% is kinda high on a leakdown test? IIRC, 4% is about the most you would like to see. I'm sure you could run one that is worse than that and be fine but he is at double or more of that.
I want my fair share
|
|
|
Re: where is my oil going?
[Re: SomeCarGuy]
#557974
12/20/09 04:05 AM
12/20/09 04:05 AM
|
Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
|
OP
master
Joined: Jul 2006
Posts: 4,179
California
|
Quote:
Anybody think 8-10% is kinda high on a leakdown test? IIRC, 4% is about the most you would like to see. I'm sure you could run one that is worse than that and be fine but he is at double or more of that.
dont' know for sure. i was told that somewhere around 4% was great for a race engine, 8-10% was somewhat average for a street engine with some miles on it.
that said, would be nice it if was better, but my understanding was that it wasn't bad either.
|
|
|
Re: where is my oil going?
[Re: Crizila]
#557976
12/20/09 12:58 PM
12/20/09 12:58 PM
|
Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
|
OP
master
Joined: Jul 2006
Posts: 4,179
California
|
Quote:
One thing is for sure, from the pics, the ports and backs of the intake valves indicate lots of oil getting in there - way too dark for a motor with 6-7K on it. With that coloration, the inside of the PCV hose will be wet with oil if it is getting in that way. Are you sure the carnkcase isn't over filled??? Run it with the PCV blocked off and both valve covers open to atmosphere and see if the consumption stops.
that is 64post's engine. i will find out if i have the same issue today...
|
|
|
Re: where is my oil going?
[Re: mickm]
#557979
12/20/09 02:34 PM
12/20/09 02:34 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Borrow a gauge and put the hose on the dip stick tube and run the car with the same set up you normally run an see what the gauge says..... if you have pressure it isnt evacuating even with the PCV and breathers which would indicate a ring issue.... if you dont have pressure its more likely to be a intake issue... a leak check or compression check can not tell you anything OUTSIDE of the cylinders(cant tell you if the intake is sealed or not) Also for a quick check.... change the PCV and make sure its a V-8 one... there is one for a 4 banger also 
|
|
|
Re: where is my oil going?
[Re: mickm]
#557980
12/20/09 02:42 PM
12/20/09 02:42 PM
|
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post
master
|
master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
|
Quote:
Quote:
One thing is for sure, from the pics, the ports and backs of the intake valves indicate lots of oil getting in there - way too dark for a motor with 6-7K on it. With that coloration, the inside of the PCV hose will be wet with oil if it is getting in that way. Are you sure the carnkcase isn't over filled??? Run it with the PCV blocked off and both valve covers open to atmosphere and see if the consumption stops.
that is 64post's engine. i will find out if i have the same issue today...
Yeah John, pay attention you old fart... 
I actually know why my ring seal is bad, I was posting the pics for Mick's benefit. If you notice in my pic the valley tray is segregated from the intake ports so it's impossible to suck oil from the valley.
|
|
|
Re: where is my oil going?
[Re: Cab_Burge]
#557981
12/20/09 03:57 PM
12/20/09 03:57 PM
|
Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
|
OP
master
Joined: Jul 2006
Posts: 4,179
California
|
Quote:
Have you check the intake fitment without a gasket to see if the space at the top of the intake manifold to the heads is the same at the top and the bottom on all four corners, top and bottom  If not you may want to do that, it is not unusual for the intake to not fit properly after the heads are cut and the block decked and so on. Some of the motors from the factory weren't close to being correct 
i did check the fitment of the intake. sitting in place with no gaskets the gap between the manifold and heads was nice and even all the way.
i sealed the intake according to tim banning's instructions, so i'm hoping that is good. i'm going to check that this afternoon, and if i fire it up then i'll play with some of the other things listed here and see if i can track this down.
|
|
|
Re: where is my oil going?
[Re: SomeCarGuy]
#557983
12/20/09 04:34 PM
12/20/09 04:34 PM
|
Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
|
OP
master
Joined: Jul 2006
Posts: 4,179
California
|
Quote:
That is good to know about the PCV. Will the 4 banger part even fit? What is different if it will?
and how do i know which is which?
|
|
|
Re: where is my oil going?
[Re: mickm]
#557984
12/20/09 04:56 PM
12/20/09 04:56 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Quote:
That is good to know about the PCV. Will the 4 banger part even fit? What is different if it will?
and how do i know which is which?
To look at them they look the same... but the flow/orfice
is larger on the V-8... you have to take the counter
guys word on it I guess
|
|
|
Re: where is my oil going?
[Re: mickm]
#557985
12/20/09 06:45 PM
12/20/09 06:45 PM
|
Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
|
OP
master
Joined: Jul 2006
Posts: 4,179
California
|
so i took the rear carb off, and i found that rubbing my finger inside the intake, it came up slightly oily. not oily like rubbing your finger along the dipstick or something, just a minor oily film. i could feel that just about anywhere my finger could reach.
took the back carb off, (where the pcv is), and it seemed slightly less. remember that the front and rear of the manifold is connected by a cross over tunnel in the manifold.
wiping a swab down in the head portion of the intake port just came out slightly greyish, not particularly oily.
the pcv Is NOT closed at idle or partial throttle, up to 3-4k. this is no load though. it is open and sucking air, and when i put my finger over it, the idle drops.
i put a piece of tissue paper over the breather tied down with a rubber band. with the pcv in place there was negative pressure, it was sucked in a bit, as you would expect.
when i pulled the pcv out of the valve cover, no pressure on the tissue.
at idle there is some visible blowby. light though, i had to look to see that it was there, but once i saw it, you do notice it. higher rpm no visible sign.
sounds like at the very least i need a new pcv. i went to the local parts store, and no breather that will fit, didn't think to check for a new pcv.
|
|
|
Re: where is my oil going?
[Re: mickm]
#557986
12/21/09 12:20 PM
12/21/09 12:20 PM
|
Joined: Jul 2006
Posts: 4,179
California
mickm
OP
master
|
OP
master
Joined: Jul 2006
Posts: 4,179
California
|
i'm going to look for a breather that will fit, and eliminate the pcv. that will at least tell me if it is directly involved with the oil consumption.
sound like a good plan?
Last edited by mickm; 12/21/09 12:25 PM.
|
|
|
Re: where is my oil going?
[Re: mickm]
#557987
12/21/09 12:35 PM
12/21/09 12:35 PM
|
Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
|
I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
|
I think 10% ona fresh engine is too high. Leakdowns tell you the condition of the compression ring.. the top ring.. But if the top ring isnt sealing gasses, the 2nd ring isn't scraping the oil well and the oil rings arent doing their job well either. Ona modern built moly ringed engine the cross hatch should barely be visible. The rings need a smooth finish to seat properly and they will show less than 4% leakdown if they have. IMO, yours haven't. If you disconnected the PCV and drove it for 50 miles you should see no drop in oil level if it's sucking past the valve. I dont think it is.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
|
|
|
|
|
One thing is for sure, from the pics, the ports and backs of the intake valves indicate lots of oil getting in there - way too dark for a motor with 6-7K on it. With that coloration, the inside of the PCV hose will be wet with oil if it is getting in that way. Are you sure the carnkcase isn't over filled??? Run it with the PCV blocked off and both valve covers open to atmosphere and see if the consumption stops.
