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Hello everyone,
I own a ’98 manual civic sedan (d16y8 engine) , and I’ve had a lot of oil problems with it.
after changing lots of seals: vtec filter and O-rings, oil pan seal, valve cover seal and the distributor seal, I’ve noticed that oil stopped leaking, but she just keeps losing it, and I find myself pouring lots of it in her between oil changes.
Mind you, the car passes an emission test (with some additive’s help), and there is’t any blue smoke when idle, though I have been told that there is some smoke when accelerating.
Who is the culprit? I’ve thought of the valve seals (12211-PZ1-004 and 12210-PZ1-004), but a video on youtube: https://www.youtube.com/watch?v=vZe0BOhjWVk, suggested the PCV valve, which I didn’t even know existed, let alone where it was or how to test it.
now I would just go ahead and change the valve seals, but it is no trivial task, without special tools (times 16 valves).
BTW I don’t have idle fluctuation (for diagnostic purposes).
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This is from an experience with a different car. . .
Check the spark plugs. If they have oil on them, then it is definitely burning oil. The PCV valve is part of the vacuum system. I had a car with bad hoses that caused too much vacuum on the PCV which caused the burning oil. If that is the case replacing the vacuum hoses may solve it. Not always really easy but you’re not pulling valves.
Have you checked the rear main, front main, crankshaft, and camshaft seals? Also PCV valve is a good one to check. If those check out, you might need to do a compression test.
I’ve heard Eric say that Honda valve stem seals are rarely a problem, but that doesn’t mean yours are good.
Do dry and wet compression tests, and a leakdown test might be a good idea too. Those tests won’t tell you about leaking stem seals, but they’re a good snapshot of the general internal condition of your engine.
Are you experiencing any clutch slippage issues? If so, it could point to a leaking rear main seal.
I wouldn’t bother farting around with heavier engine oils. That won’t fix anything.
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