truck...

[454 Big Block Chevy]

so after talking to dave, i'm hoping and praying its just a torn piece of rubber.... and not a valve guide...

should find out tonight...


i'm fouling out one spark plug... #2 cylinder chevy 305.  fouling out in about 150 miles, to point of failure (not sparking).   I suspect valve stem seal allowing oil past and fouling plug.  engine runs great, and doesn't seem to "burn" much oil... mabey a quart an oil change, and most of that is leaked out in my driveway... (bad rear main).  Hopefully its the stem seal, cuz those are really cheap... (11 bucks).  always something around here... but usually its simple stuff on my tru ck.

[North Pack]

Good luck with it Ed, - glad it's not mine, it would be at LEAST a valve stem seal.

[JonnyReb]

 Best motors i ever ran in my work trucks.. i'm a freak about oil changing and i think that played a bit part in their longevity, 3 of them and all were sold with between 280,000- 321,000 miles, all running with NO oil burning and would still pass emissions test. Of course most of the other components in the trucks were replaced but we never took off so much as a valve cover on one of them. Right now i'm driving a 2000 model van,350 motor, last year they made them, with 286,000 on the clock, not a drip or leak, Burns nothing, original EVERYTHING including the tranny with the exception of the water pump and radiator. The most impressive vehicle i've ever owned.  Loved those Chevy's..   J

[uncle paulie]

Did you try running a hotter plug in it, I've had a bad guide in my 94 Dodge 1500 for about 30k now and the cylinder fires fine with hotter plugs in it, smokes slightly when it idles too long, but not noticeable on the road. Put synthetic oil in it last change to get it through inspection. I really wonder if we can get away with this type of stuff with the new ones. Seems the older ones just keep on ticking!

pv 

[454 Big Block Chevy]

i tried to get the valve stem seals out tonight, but the spring compressor i ahve isn't designed for the beehive double spring systems... luckily is the inside of this engine looks very nice... i'm starting to wonder if it is a seal... i had a few intake manifold bolts loose, and i tightened them down... made a NOTICEABLE difference in the spongyness of the brake pedel, feals way easier to push and brakes work better... mabey i had a small vaccum leak on my intake... we'll see... i put a different brand plugs in it... and we shall see.

[454 Big Block Chevy]

alright, after tightening the intake manifold (about 1 full turn on all the bolts on the passenger side), i replaced the offending cylinder's spark plug wire, and went with a slightly hotter plug,  all the way around, (Champion R17, or whatever, comparable to an autolight 26... )  after a few miles, its burning perfectly... perfect light tan deposit on all plugs... idles smooth as can be, plenty of power (that a 305 should have), brakes are firm, not spongy, and cruises on the highway at 75 mph quite nicely.  before it would stutter at 75 or so, just a hair if i tried to accelerate a bit without down shifting.  I think i made it happy!!!!  it would appear as if its Not BURNING oil, just leaking it all over my driveway... i dont' know exactly from where, i suspect a rear main, if i park with the nose slightly pointed down hill, it doesn't leak at all.... so eaither back of hte oil pan, or rear main.