sbc spark plug fail

[pfcvdv]

Answer some questions for us please. What do you mean you have to refill the oil? All of it or just top it off? Secondly how do you know your compression is good? Did you hook up a compression gauge to each cylinder? Do all the plugs oil foul or just a couple. You should use some type of sealer on the rocker studs that go all the way through. The way you make it sound I would have to agree with Ritter and say you have some ring issues and lots and lots of oil burning going on.

i have to refill all, from max to min in 200 miles.
i did an compression test on cyl 7 (one of the failing) and it was 10:1
im not sure the rocker studs ar 100% responsible for all this, but what else could it be??

 

[pfcvdv]

you never mentioned you have an MSD box...good luck

why🙂?

 

[pontiacgp]

you never mentioned you have an MSD box...good luck

why🙂?

if you had mentioned you has a new msd box I wouldn't have suggested the ignition module since there isn't one when using a box....but it does sound like an ignition or electrical problem to me, the backfiring and loss of power that is, the loss of oil is something else

 

[CHRIS.O]

I've never seen a gauge that measures in ratio only in psi. Does it have a PSI rating? I'm just trying to help you rule that out. Last time I had a dead cylinder that oiled it up it was because I had about 40psi in that cylinder rather than the 110psi it was supposed to. This was on a jeep 6cylinder. I am thinking it absolutely has to be mechanical. If you are losing all the oil in 200 miles and oil fouling plugs you have a ring issue. Or a major obvious leak. Thats about my only ideas. I hope you can figure it out.

 

[pfcvdv]

I've never seen a gauge that measures in ratio only in psi. Does it have a PSI rating? I'm just trying to help you rule that out. Last time I had a dead cylinder that oiled it up it was because I had about 40psi in that cylinder rather than the 110psi it was supposed to. This was on a jeep 6cylinder. I am thinking it absolutely has to be mechanical. If you are losing all the oil in 200 miles and oil fouling plugs you have a ring issue. Or a major obvious leak. Thats about my only ideas. I hope you can figure it out.

i measure in bars atmosphere

 

[pontiacgp]

on the cylinders that are low put some oil in the cylinder and do a compression test. If the compression goes up you have an issue with the rings or maybe the bore if it was recently machined. If the compression does not raise then it's the valve

 

[RITTER]

i measure in bars atmosphere

:? :?: :?
Never heard of such thing. Can you explain that to us :?:


Your ignition may or may not be a factor here :idea:

The known facts are, you are getting oil into your combustion chamber somehow ... There are only a couple of different ways this is even possible;

-piston rings
-valve seals

 

[RITTER]

on the cylinders that are low put some oil in the cylinder and do a compression test. If the compression goes up you have an issue with the rings or maybe the bore if it was recently machined. If the compression does not raise then it's the valve

That is a good thing to know. Thank you

 

[pfcvdv]

on the cylinders that are low put some oil in the cylinder and do a compression test. If the compression goes up you have an issue with the rings or maybe the bore if it was recently machined. If the compression does not raise then it's the valve

That is a good thing to know. Thank you

yeah i think im gonna go for that, along with sealing the rockr studs,
i also have a small inspection camera to look in the intake. but i leave that for the weekend. i let you guys know if its gonna be clear..

 

[RITTER]

Your rocker stud holes are drilled completely thru :?: