Oil in number 6 cyl.

[thirstyzr1]

Hi All,

Its June and I still have not started my stock 90. Has been stored since last fall in my heated garage. Fresh oil after parking it.
Decided to change the plugs before putting it back on the road next week.
I pulled out number 6 plug and its covered in oil. The car ran fine all of last year.
Any thoughts?
Thanks, Jeff

[Z06scentair]

Time to remove the cam cover and replace the o-rings. They seal the head to cam cover.

[GOLDCYLON]

As stated you need to remove the Cam cover and replace the Oring plug seals. GC

[thirstyzr1]

Ok thanks for the input.
There are 2 mechanics that have LT5 experience within an hour of me. Drive or Tow?
It was only # 6 that was oily.

[Z06scentair]

Clean the plug off and stuff a rag down the bore to remove as much oil as possible. Put the plug back in and drive.

[RussMcB]

Maybe crank the engine a few revolutions before putting the plug back in to give it a chance to push the oil out of the plug hole, just in case there's enough oil in there to cause hydraulic lock (probably not, but ...).

[thirstyzr1]

Thanks for the replies Gentlemen.

[Mystic ZR-1]

Hi All,

Its June and I still have not started my stock 90. Has been stored since last fall in my heated garage. Fresh oil after parking it.
Decided to change the plugs before putting it back on the road next week.
I pulled out number 6 plug and its covered in oil. The car ran fine all of last year.
Any thoughts?
Thanks, Jeff

Do you mean oil on the electrode or the outside of the plug?

[Dynomite]

Hi All,

Its June and I still have not started my stock 90. Has been stored since last fall in my heated garage. Fresh oil after parking it.
Decided to change the plblugs before putting it back on the road next week.
I pulled out number 6 plug and its covered in oil. The car ran fine all of last year.
Any thoughts?
Thanks, Jeff

Covered in Oil means what?

Do you mean oil on the electrode or the outside of the plug?

Lets assume Oil outside of the plug.......
How much Oil and when is the last time you checked the #6 plug?

If the plug is just a bit oily and it has been a long time, just clean the plug, clean the port and reinsert the plug and drive. I had the situation one time and it probably took several years to get a bit of oil in the Plug Socket.

In addition it could be high crank case pressure and your PCV system clogged a bit forcing the oil past #6 "O" ring. Could even be that someone had the Cam Covers off and got oil in the #6 Plug Socket. If it is just a bit of oil and the plug a bit oily, just clean things up and drive. Check again next oil change.

[thirstyzr1]

By the time i pulled the plug out in was covered including the threads...but considering how oily the socket was i may have just been pooled up. Threads would have been exposed when i backed the socket out.
The wires were replaced in fall of 13 along with all the usual things under the plenum. I ment to do the plugs last spring but just forgot about them. I am moving and was cleaning in the garage. Found the plugs and did them today.

[thirstyzr1]

I have not had the plugs out since owning the car.

[Dynomite]

I have not had the plugs out since owning the car.

So.....there could have been oil sitting in #6 in the Fall of 13 and you did not notice it?

[thirstyzr1]

I guess its possible that i did not notice any oil on the old plug wires. I did just have a look at the old wires...grant it they have been sitting in a canvas bag for 18months. They were not greasy at all.

I saw it on plug wire today.

[Dynomite]

I guess its possible that i did not notice any oil on the old plug wires. I did just have a look at the old wires...grant it they have been sitting in a canvas bag for 18months. They were not greasy at all.

I saw it on plug wire today.

That was my next question.....how much of the tip of the plug wire has oil?
You can actually have no oil on tip of plug wire (black insulator) but get oil on a socket.

I have just a tiny bit of oil on two plugs on a 1990 but not enough to remove the Cam Covers Engine In Car which can be interesting. And Definitely not enough to remove the engine :p

Because of the angle of the plug you might have a bit of oil on the bottom section of the plug wire or oil around the bottom hex of the plug only.

If that be the case it is much easier to just pull the plug wire and using paper towel clean out the oil without removing the plug once in a while. And when/if you ever decide to remove the Cam Covers install New "O" rings then as that is a normal replacement.

Clean the plug off and stuff a rag down the bore to remove as much oil as possible. Put the plug back in and drive.

You can then go to SS Allen Head Cam Cover Bolts but again.....check with us before you try to remove those Torx Cam Cover Bolts Engine In Car.

A Side Note......Use just a tad of white grease on the black insulator where it pops into the cam cover near the top (there is a ring at that location on the insulator). Makes it much easier to remove next time.

[thirstyzr1]

I was not much on the very tip of the insulator...much more noticeable on the plug and socket.
I will end up taking it to Dasilva Motorsports to get a once over and a cooling system service. I will get them to check that plug after I have driven it.
The oil was dirty. It may have been sitting there for some time.
I cleaned out as much as i could and dropped a new plug in. I will check it after I run it before I take to Dasilva

[Mystic ZR-1]

OK, I'm guessing the oil is on the outside of the plug and any oil on the electrode got there when you pulled the plug out? Probably just the o-ring like everyone thinks.
Not a show stopper, clean out the cavity, clean the old one or put in a new plug and keep an eye on it. Next time look in the hole with a flashlite and mirror if needed and clean it out before removing the plugs to keep the oil and whatever else may be in there from falling into the cylinder.

[thirstyzr1]

Its always something. Last year it was the clutch slave cylinder right before i left for Carlisle.
Thanks again!
Jeff

[Z06scentair]

Its always something. Last year it was the clutch slave cylinder right before i left for Carlisle.
Thanks again!
Jeff

Letting any car sit is the root cause of most issues. The o-rings that were removed from my 90 were a Buna material with a durometer specification of 75. The ones used for the replacements were Viton with a durometer reading of 60. The newer softer Viton should last forever regardless of how long the car sits.

Not that big of a deal to change them......remove a few items (brake booster, coolant pipes, etc). Be very careful with those torx bolts if you decide to tackle the job yourself. Impact Gun Required as well as two, three, four, of the correct size Torx tools.....lol

DYNOMITE has the how to..........I'm confident :)

[thirstyzr1]

I just dont have it in me to drive it in the snow....my Mustang on the other hand....