Are there lines that run from the spark plugs with o rings in them to keep oil out ?
My car is at the shop they changed the spark plugs and the O2 sensor in front of the Catalytic converter. they said the lines from the spark plugs may need to be blown out as there are O-rings in them to keep oil out but there seems to be some oil in those lines
My car has 150000 miles.
My car has a manual transmission.
Experienced mechanics share their insights in answering this question :
There are no ’lines’ that connect the spark plugs to any source of oil. However, there are o-rings placed inside the valve cover along with the valve cover gaskets that are intended to prevent oil from reaching the spark plugs. If these o-rings have failed, this can cause the engine to misfire. The only way to resolve this issue is to remove the valve cover and replace the o-rings. Consider YourMechanic for this service as it can be done from your home or office.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
Final Thoughts. Your spark plug threads and plug wells are not places where oil should be. There are multiple signs to look out for, like an illuminated check engine light or blue smoke from your exhaust pipe. There are also several reasons for oil on spark plugs, like a blown head gasket or worn compression rings.
Oil leaking into the spark plug wells is an indictor of a fairly serious problem that should be inspected and repaired immediately. It is almost always due to a failing gasket or O-ring but can also be the result of a failing piston or worn valve guides.
This O-ring for the spark plug is mounted on the top of the engine head and seals the cover for the cylinder head when it is mounted. This O-ring for the spark plug is mounted on the top of the engine head and seals the cover for the cylinder head when it is mounted. Original Rotax Max spare part.
#1. Spark Plug Wire. Spark plug wires in your Subaru carry electricity from the distributor or ignition coil to your spark plugs. Old and failed wires can short out causing anything from hesitation and bucking to excessive interference in your radio.
Blue Exhaust Smoke
The exhaust pipe may soon begin to emit blue smoke, indicating that oil is being burned somewhere in the engine. Typically, such indicators appear when there is oil in the spark plug well. When there is oil on the spark plug, it affects the engine`s efficiency and how it burns fuel.
Dielectric grease is a simple compound of oil and silica filler that`s very hydrophobic and is excellent at sealing out moisture and preventing corrosion.
Oil contamination on spark plugs. Many coil-on-plug ignition systems feature ignition coils mounted into a tube that is a part of the valve cover. Over time, the seal between the valve cover and the tube can fail, allowing oil to leak in and fill up around a spark plug and into an ignition coil.
Specifically, if the PCV valve malfunctions, or is stuck open, it allows some of the oil that is used to lubricate the pistons and cylinders to escape. This wayward oil can then find its way to the surface of the engine`s spark plugs, resulting in a condition known as “oil fouling.”
Degradation occurs when the O-ring material is unable to withstand the effects of a particular chemical. Elevated temperatures, excessive stretch or compression, and mechanical stresses can accelerate chemical attacks. A degraded O-ring may show discoloration, blistering, cracking, or a change in shape or hardness.
Most manufacturers recommend an 8 or 8.5mm plug wire on most applications. Exceptions would be an all-out race car or a street rod where EMI/RFI suppression is not a concern, but weight and appearance are. In which case, a 5 or 7mm wire might be a better option.
Spark plug wires can`t add horsepower (despite what some may claim), but they can adversely affect your vehicle`s performance. That`s why it`s important to select a good quality set of spark plug ignition wires to deliver juice to your spark plugs.
Black, oily deposits on the electrodes and insulator tip points to an oil-fouled plug. Oil could be leaking into the cylinders, getting past pistons that are worn or valve guides that are worn. Finding the source of the leak is very important – consult a mechanic for guidance.
Anti-seize
This silver or chrome-colored finish on the threads is designed to provide corrosion resistance against moisture and chemicals. The coating also acts as a release agent during spark plug removal.
Black, oily deposits on the electrodes and insulator tip points to an oil-fouled plug. Oil could be leaking into the cylinders, getting past pistons that are worn or valve guides that are worn. Finding the source of the leak is very important – consult a mechanic for guidance.
Oil contamination on spark plugs. Many coil-on-plug ignition systems feature ignition coils mounted into a tube that is a part of the valve cover. Over time, the seal between the valve cover and the tube can fail, allowing oil to leak in and fill up around a spark plug and into an ignition coil.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Are there lines that run from the spark plugs with o rings in them to keep oil out ?
ANSWER : There are no ’lines’ that connect the spark plugs to any source of oil. However, there are o-rings placed inside the valve cover along with the valve cover gaskets that are intended to prevent oil from reaching the spark plugs. If these o-rings have failed, this can cause the engine to misfire. The only way to resolve this issue is to remove the valve cover and replace the o-rings. Consider YourMechanic for this service as it can be done from your home or office.
Spark plug chaos. Rubber stoppers are preventing the spark plugs from coming out.
ANSWER : Hi there. Try using a pair of small needle nose pliers to pull off the rubber boots from the spark plugs. As you pull, twist the rubber boots to break them free. If you cannot get the rubber boots off, then try using some mineral oil on the boots to aid them off, then clean off the oil with soap and water with degreaser. If you need further assistance with removing the boots from the spark plugs, then seek out a professional, such as one from Your Mechanic, to help you.
lost all oil pressure, replaced the oil pump, low oil sensor, oil pressure sensor, oil pan gasket,
ANSWER : The fuel pump will not stay on if you loose oil pressure. This is why it is shutting off. The loss of oil pressure may be from bad crankshaft bearings or camshaft bearings. The engine oil pan should be removed and the oil pump needs to be checked to ensure that you put in the pick up tube seal to the pump and connected the pump to the block. Then remove at least one main bearing cap and inspect the bearings for excessive wear and crankshaft damage. If you need some help with this, consider YourMechanic, as a certified technician can help diagnose the issue with your oil pressure firsthand and help you fix it accordingly.
think i put wrong oil in car went few miles lose power car dies oil in spark plugs still starts low oil blinking light before die.
ANSWER : Hello. If you put too thick of an oil in the car, then you may have damaged the engine bearings but this should not have caused oil to get in to the spark plugs unless the oil got into the intake of the engine or one of the pistons rings broke. If you ran it without oil and then tried to put oil in thinking it would be okay after that, then you were not that lucky and broke or damaged all of the rings on the pistons. If you would like to have this looked over, a certified professional from YourMechanic can come to your car’s location to inspect the stalling issue and go over all of the relevant systems for a better diagnosis.
Engine will not stay started. I have replaced idle control valve map sensor spark plugs spark plug wires no check engine light is
ANSWER : You have a problem with the distributor assembly. I recommend replacing the distributor assembly. This will replace all the possible sensors and coil for the ignition and fix the problem you have.
Poor idling, hesitation on acceleration, and oil on spark plugs.
ANSWER : Hello. From what you describe, it would appear that your vehicle may be experiencing more than one issue. Oil on the spark plugs can be caused by a few different things. If you also found oil in the spark plug tubes, then it may be possible that the valve cover gaskets or spark plug tube seals have begun to leak allowing oil into the tubes.
In some cases, the oil can work its way past the threads into the cylinder. You also mention, however, a loss of performance as well as smoke in the exhaust. This can be caused by oil getting into the cylinder, usually due to engine wear.
If the engine piston rings, or the cylinder head valve stem seals wear out they can allow oil into their respective cylinders. This could explain the oil on the plugs, the smoking, and even the loss in performance, if the issue is related to the piston rings.
A compression test would be the best way to determine if this may be the case. The battery terminal will also need to be taken care of before the engine can be restarted again.
In some cases, a poor battery connection can affect engine performance, however, it will not cause oil on the spark plugs or smoke from the tailpipe. I would also check the opposite terminal, as well as both battery cables to see if they may be corroded or in need of replacement as well. If you would like to have a professional scope this out, a certified technician from YourMechanic, can come to your car’s location to inspect the rough idling, hesitating acceleration, and oil leak to figure out what repairs are needed.
I have a 2001 Lincoln LS and the spark plug on the number 8 cylinder is leaking getting oil on the spark plug what do you think th
ANSWER : Sometimes there can be oil on the spark plug threads but the plug itself is not fouled. If the firing end of the plug is OK (not fouled, and not covered with liquid oil and so forth), the cause of the misfiring is probably not the oil leakage but rather something else. If there is oil on the plug electrode and the plug is fouled, the oil gets in due to leaking piston rings or leaking valve guides and valve stem oil seals. You can try to gauge the condition of the rings, and cylinder No. 8 in particular, by testing cylinder compression in all cylinders. If compression in No. 8 is lower than the rest, there are tests that can help to gauge if the lower compression is due to ring wear. With regard to the valves, there’s a "possibility" that installing new valve stem oil seals could reduce oil leakage into the cylinder but, if the valve guide turns out to be really worn, putting a new seal on will be a very temporary measure. The bottom line is if the plug is oil fouled and a simple valve stem oil seal replacement is not likely to help, the engine will have to be rebuilt. If you want a definitive, on site diagnostic, please request a spark plug/oil leak diagnostic. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.
Just replaced spark plugs and wires and my car is still miss firing and I can’t pin point why and my old spark plug is oil covered
ANSWER : Hello there, many faults will cause your 1988 Ford Contour to have a misfire even after the spark plugs were replaced. When oil is seen on the spark plug this indicates that the valve cover is leaking onto the plugs. When this happens it fouls the plugs and can cause a misfire. Until the oil leak is addressed the spark plugs will continue to become fouled. If the misfire persists there are many potential causes such as the plug wires, fuel pump, vacuum leak, oxygen sensor, MAF sensor, or the cap & rotor. A qualified Technician such as one from YourMechanic will be able to diagnose your misfire fault and make any repairs required to resolve the issue.
