Quote:
Originally Posted by TYinhouse
does the valve spring issue cause engine oil leak? my 2013 frs had engine light on and i can smell oil burns. there are also grease accumulated on the engine. i want to know if dealer will fix it during the recall.
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A valve spring failure could result in engine failure.
The dealer may fix the leak during the recall if the leaky part has to be taken off and resealed, like a camshaft cover or camshaft cap/housing.
Also keep in mind that oil burning on the exhaust, as seems to be the problem in your case, affects the oxygen sensor's reference to ambient air. Any exhaust oxygen sensor needs a reference to air outside of the exhaust, if you've got lot of oil smoke filling the engine bay, you're decreasing the amount of oxygen in the reference signal versus what is in the air being burnt in the engine (the intake being located in the bumper). Your engine management may be trying to enrich the mixture to get rid of the "excess" air it's seeing in the exhaust, when in fact it's dealing with too little air in the reference signal, triggering the system lean code.
Also, it's been said to "not drive it to risk a spun bearing" - that is not a concern. Pull the dipstick, if there's oil between the marks, spinning a bearing from an oil leak isn't a real worry. The real problem is enduring the situation for too long and doing long term damage to the cat converter. A lot of old subarus piss oil from everywhere for years, a lot of those old subarus have P0420s, but those old beaters just keep beating on as long as there's oil in 'em.