i have a mazda 626 1994, i just changed the plugs to find the rear 3 plugs were saturated with oil, what does this mean?
Mar 3, 2007 at 2:35 AM
1994 Mazda 626 Oil-Soaked Plugs
MULCH
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- 5 POSTS
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The plugs reside in plug holes and the seal that is associated with the valve cover is bad. Put on a new valve cover and replace the grommets that cover the plug holes. Should take care of the problem, but do it. Not good for the wires or plugs to be bathed in oil.
Mar 4, 2007 at 5:49 AM
He is right.
Most of the time the rocker cover gaskets them selves are just hardened. The new gaskets come with the covers for the spark plug holes.
It would be in your best interest to change BOTH roker covers gaskets at the same time, and to change ALL the rocker cover bolt seals at the same time.
Being as you are saying the rear plugs....you will also need two intake gaskets for when you take the intake manifold off.
This job is not really for a do-it-yourself person. There are a few things that you can really mess up while removing and installing the intake gasket on these motors. So think hard before you attemt it yourself.
The average book time for this job (and don't quote me) is between 3-4 hours of labor.
Think around $60-100 parts (CND)
Most of the time the rocker cover gaskets them selves are just hardened. The new gaskets come with the covers for the spark plug holes.
It would be in your best interest to change BOTH roker covers gaskets at the same time, and to change ALL the rocker cover bolt seals at the same time.
Being as you are saying the rear plugs....you will also need two intake gaskets for when you take the intake manifold off.
This job is not really for a do-it-yourself person. There are a few things that you can really mess up while removing and installing the intake gasket on these motors. So think hard before you attemt it yourself.
The average book time for this job (and don't quote me) is between 3-4 hours of labor.
Think around $60-100 parts (CND)
Mar 5, 2007 at 10:06 PM
Suggested Repair
Replace both rocker/valve cover gaskets, spark plug well seals or grommets, and all rocker cover bolt seals. Rear-plug access requires removing the intake manifold and installing two intake gaskets. Expect about 3-4 hours of labor and roughly $60-100 CAD in parts; consider a shop if you are not experienced with intake removal.
Conversation Summary
The owner of a 1994 Mazda 626 found the rear three spark plugs saturated with oil. Experts attributed this to failed valve/rocker cover seals and plug-hole grommets. They advised replacing both rocker cover gaskets, plug-hole covers, and all bolt seals, plus two intake gaskets needed when the intake manifold is removed. They noted the job takes about 3-4 hours and is easy to damage if done incorrectly.