ok so i bought my 82 280zx non turbo i changed the oil yesterday and well overfilled it now its smokes and fouled the plugs i drained the oil and changed the plugs got it to run smoothly for a few and now she wont start the plugs are fouled again and the oil is where it needs to be.... do i clean the cylinders and if so how? and is there any way to get her running with out buying new plugs every 5 min

 

Not to sound too condescending, but is this your first oil change ever?

How much over did you overfill it? 1qt? 2qt? 3qt?

 

This reminds me of a Sienna that we had come in a few months back, the parents had their kid (16 or 17) change the oil, and he Filled it to the oil cap.

Motor ded.

 

i feel a little insulted but i must admit it was a simple but very bad mistake.... I'm actually well rounded with working on cars and have done many of oil changes for some dumb *** reason i over filled it by 1 1/2 quarts *facepalm* i apparently couldn't read the stick... stopped and checked it twice... besides deciding how much of a noob/dumbass i am lol can i please get some help? this is a first for me so i need some help on cleaning the cylinders and prevent the fouling of the plugs... im guessing i need to clean the intake too? which is fine since my exhaust manifold gasket has a leak and needs to be changed anyways... do i spray carb cleaner cylinder by cylinder? burning it off one by one? or can i clean it by spraying carb cleaner at the mass airflow sensor?

 

Start by checking the PCV line that goes from the front left side of the block to the bottom center of the intake manifold. If that is full of oil, you'll definitely be in for a full cleaning party.

I wouldn't use any cleaners to "wash" the cylinder walls... you'll just contaminate the oil and kill it's lubricating properties.

Dunno what else to tell you other than checking to see how high all the oil got... Major overfills can float the rings, so you might want to check the compression too.

 

1.5qts? How long was it run?
My first oil change was 3qts off, ran, drove it to mechanic friend, bearly made it there...

He drained the motor, refilled to proper level, pulled plugs and spun it over (cutting fuel and spark ofcourse) ran fine afterwards, maybe soak plugs in gas for alittle and scrub with brush...

assuming that nothing drastic happened (bent rod, goofed seals ect...) Should fire right up and burn of excess. My first car was an old 87 civic si, id like to think the l28 is stronger than that

 

issue resolved: pulled the plugs poured some gas in, turned it over a few times (plugs out) cleaned the plugs and cranked one first try. bust not to change subjects or anything but how do i pull the intake manifold?(with out pulling every thing off?) and are there better injectors?

 

Better injectors? Better than a whole pile of guys running around with 30 year old injectors that still work. Maybe.... Or do you want to do some sort of performance upgrade - if so you'll need to get more than just injectors.

https://www.zdriver.com/forums/240z-...-gasket-18779/

 

would there being a little too much oil (oil line on dipstick is barely above the top of the hash marks) cause a clicking sound in the engine? valve lash is adjusted, and the only other thing i can think of is a worn piston, which a mechanic tells me is probably not the problem since it is an l28.

(something about japanese cars of the time having more nickel in the metal which makes them less prone to wearing) that is of course an over-the-phone diagnostic. he didnt know about the oil causing the clicking though so i defer to your expertise guys.

 

Yay finally! So your mechanic said that it was unlikely that the cylinders are less prone to wearing because they have a high nickel is correct! Ding ding ding! You'll have to excuse me - normally we get some idiotic out to lunch diagnostics from "mechanics".

Oil barely above the hash marks won't do anything....