I pulled these today from my engine.





It is dry and not wet. Spark plug 1 seems to be worse than the other three. What do these plugs indicate? Clean and Reuse? thanks

 

hmmm, my thoughts are not good.

no.1 seems to have some sort of deposits on it.

my reaction is to say that it looks like you may have a slight coolant leak into no.1 cylinder...

the rest look fine.

i dont think a compression test will show anything in no.1, how is you oil and coolant looking?

any milkyness under the valve cover? (take it off to see...)

any startingf problems? bubbles in coolant overflow bottle?

t..

 

i thought coolant leaks in cylinders put an orange/rusty deposit on the plugs?? plus how long have those plugs been in the engine?

 

Last oil change was approx. 1500 miles ago. (The spark plugs were changed at the same time)

I took off the valve cover today, No milkyness at all. Oil is dirty(dark) like I havent changed it for a while though.
Coolant is fine, clean and I have not experienced any coolant loss.

I have no starting problems and the car drives fine. Only thing I did notice is that there seems to be more "sooty carbon" deposits in cyl. 1 than the other three. Plus, I had to add a quart of oil yesterday when I checked the plugs because it was down to the bottom dot on the dipstick.

What else could be the problem? I have installed fresh new plugs today. Although the ones I pulled out yesterday, the electrodes are still in good shape, minus the deposits left on them.

 

its kinda hard to see but that grey stuff looks like lead deposits.....what kind of gas are you usin?

 

it must be oil then, in No.1 cylinder...

what happens if you are driving down hill with no throttle at all and when you put your foot down on the gas, what sort of smote (if any) comes out the exhaust???

t..