Does the intake fit better now? Can you snug the bolts down more?
Fuel smoke and fouled plug
- Thread starter Nick I
- Start date
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Oh yeah, fits great! No leaks and gained vacuum. The previous installation wasn’t aligned at all and had sealant everywhere. I’ll be pulling the valve springs in the morning to see if the seal are bad or if maybe the guides are bad on #8.
Update 3
Discovered I have Teflon seals. Checked to make sure they were all seated properly. Everything check out. Buddy of mine who builds motors says with these types of seals you’ll always have some oil burning.
I am back to square one though. The smoke and rough idle only come on after the car warms up, maybe 20-30 minutes of driving after 10 minute warm up. I think I’m back to chasing ignition problems. I can’t get the car to accept the vacuum advance either. Hard to start when it’s hot too, like the battery is dying.
My next steps are battery, electronic distributor, and plug wires.
P.s. I’m mostly venting at this point ha ha!
Discovered I have Teflon seals. Checked to make sure they were all seated properly. Everything check out. Buddy of mine who builds motors says with these types of seals you’ll always have some oil burning.
I am back to square one though. The smoke and rough idle only come on after the car warms up, maybe 20-30 minutes of driving after 10 minute warm up. I think I’m back to chasing ignition problems. I can’t get the car to accept the vacuum advance either. Hard to start when it’s hot too, like the battery is dying.
My next steps are battery, electronic distributor, and plug wires.
P.s. I’m mostly venting at this point ha ha!
512Stroker
We are all here because we are not all there.
Maybe I missed this early on but what are you running for a PCV system?
DrCharles
Well-Known Member
I was reading an unrelated thread on Moparts and saw this interesting post:
So if you're still burning oil on #8, and the seals are ok, I'd continue to look for sucking oil into that port...
So if you're still burning oil on #8, and the seals are ok, I'd continue to look for sucking oil into that port...
open system as of now. I dismissed crankcase ventilation as a culprit with having the one bad plug.
Thanks for this info! I know it’s sealed up better than it was since my vacuum increased, BUT it’s still possible I’m pulling oil in. When it’s barely warmed up, it runs like a top. Only after driving it around and getting on it or reving it up in the garage does this crap start. Let it sit the next day and it’s fine at startup again until it actually gets used.
my buddy suggested possible glazed cylinders and blow by. Since I have good compression and only 6% loss on leakdown. I just think the motor was never properly broke in before the previous owner started ripping on it, had way too rich of a carb running on it, and now I’m chasing the gremlins.
Im seriously considering paying a shop to do a ring replacement and cleanup. Then I’ll know what cam is in it, what compression it’s running, if it’s been bored out, all that.
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512Stroker
We are all here because we are not all there.
I here what your saying - the one plug deal.
I will tell you that engines that are not vented properly can and will do strange things. As $cheap and simple as it is to add it to your engine it would be one less issue to eliminate. Cant hurt and you my like the outcome.
Absolutely agree. I’m on the hunt for a cap/pcv combo that has the same hose size as my carb. I got a little distracted with the other issues.
On a positive note, reseating the valve seal and driving the car cleaned my plug up.
Looking more like a cylinder or ring issue.
yellow rose
Overnight Sensation
I have some cast Mopar Performance covers, I might have some stock ones also.
Nice, can you message me with some pictures of the Mopar performance? I also think I may need taller ones. The Crane adjustable rockers seem to have made contact at some point with the splash shield on the ones I have now.
I was looking at the MP black with blue writing on summit last night.
You might want to run a compression & leak down test, you may have a broken ring or burnt valve on # 8.
Already done. #8 was one of the top performers on both tests. Now that the plugs are staying clean I’m leaning towards cylinder glazing.
This is a long thread, mostly because of my ramblings.
Current issue/symptom is very light smoke coming from the passenger exhaust. Only happening at idle from what I can tell and is at it’s worse when the motor is hot and has been rev’d or driven. I believe it’s a blueish grey smoke. Good compression and leak down on all cylinders. All spark plugs look great now. Haven’t tried hooking up the vacuum advance since installing new intake gaskets but it hated it at higher RPM before.
I also need to properly install the PCV system as it is currently venting to atmosphere through filtered caps.
A good PVC system will help, the blueish gray smoke is definitely oil. When your performed the compression/leak down test, was there much escaping around the valve stems? I know you may have covered this, but I didn't see it, I'm just spit balling trying to figure where the problem lies.
No worries! I appreciate any and all suggestions.
From what I could tell, all air escaping was passed the rings. On a cold test, the worst cylinder had 92/100 and it was on the drivers side. Warm test it was at 94. All passenger side cylinders were 94 both cold and warm.
The valve seals are all brand new looking and are the Teflon kind. Before I owned it, the motor was rebuilt and never fired up. The car exchanged owners and the guy I bought it from runs a classic car dealership/repair shop. I have no clue if they broke it in right. The car was running insanely rich when I got it. I had the mix screws turned all the way in and it still ran rich. That’s what makes me think it’s cylinder glazing. If I had a borescope I would know for sure.
Inertia
Well-Known Member
It's not uncommon for an engine that was sucking/burning lotsa oil, to accumulate a " tar " in the exhaust system that can take quite a while to burn out.
Those vehicles can smoke for several days/mi!es depending on accumuation.
Put some more miles on it.
At least another 500, you aren't going to hurt anything more.
Commercial engine builder won't even listen to you till 2000 miles.
Then, if still smoking, read the plugs
Those vehicles can smoke for several days/mi!es depending on accumuation.
Put some more miles on it.
At least another 500, you aren't going to hurt anything more.
Commercial engine builder won't even listen to you till 2000 miles.
Then, if still smoking, read the plugs
Will do! I know the manifold on that side has the valve in it still. When I pulled the head pipe from the manifold to replace the gasket is was coated in that crap big time.
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