Spark Plugs And Oil In Cylinder, Help!
Posted 02 October 2006 - 02:44 PM
Posted 02 October 2006 - 02:58 PM
I did not see anywhere where any oil could have leaked down from on top of the engine. I read another thread about the valve cover gasket being an issue sometimes, but this was just referring to the front of the engine correct? I did not see how any oil could have leaked down in the cylinder in the back. I am thinking maybe bad rings? I think the oil was a little past full also, could that cause this type of a problem? This 1999 Mazda 626 has 120k miles.
There is also a VC on the back of the engine. This is a V6 and there are two VC gaskets one for the front and one for the back. The back is a little more time consuming to change because you also have to remove the IM (intake manifold) inorder to get to the rear VC gasket.
Posted 02 October 2006 - 03:33 PM
Posted 02 October 2006 - 09:21 PM
Here is a long thread on changing front and rear VCGs. http://www.mazda626....showtopic=12906 Check your front bank spark plugs first, because changing the front VCG is easier, and so it is good practice to build up confidence before tackling the rear VCG. And when you change the rear VCG, do the hardest bit first: locate and remove those two accursed bitch bolts!
Posted 03 October 2006 - 06:25 AM
Posted 03 October 2006 - 08:43 PM
So this probably is the valve cover gasket instead of the bad rings or another issue, would everyone agree? After all, there was oil on the bottom of the plug wire. Besides removing the Intake Manifold, is there anything I should know about before I attempt to replace the valve cover gaskets? How long might it take?
Since you will be removing the intake manifold, there is a rubber coolant hose which you should also replace while in there. It is highly recommended to change this hose or at least inspect the hose each time the intake manifold is removed.
Posted 04 October 2006 - 05:25 AM
Posted 04 October 2006 - 09:25 PM
I don't remember that hose. I remember there being two (I think) metal coolant hoses running along the V, underneath the IM. Maybe they have rubber end connections? Do they (or the rubber bit) normally need replacing?
NickR you are correct about the metal coolant lines located at the bottom of the 'V' The metal coolant line, also known as water bypass line is attached to a rubber hose on the left side (driverside), this is the hose that I am refering to, it is so much easier to replace or at least check the hose with the IM off. Don't really want to remove the IM again to replace this hose.
Posted 05 October 2006 - 01:18 AM
valve cover gaskets or a good brand?
Posted 19 October 2006 - 09:43 PM
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