So, here is the story: purhaced a car off lease with about 34k on the clock. Things appeared ok at purchace (clean dipstick, no crud visible from the oil fill. Shortly after purchace it started occasionally blowing a cloud of smoke at startup. Dealership ran a compression test and all was good. Techs were baffled and generally unhelpful. I managed to figure out that the PCV passage in one of the valve covers was gunky and not draining well. As oil mist co densed it was retaining a pool of oil that was getting sucked into the PCV on startup. Blasted it out, cleaned the pcv, no more smoke, no more oil consumption. Was thrilled ot wasn'trings or valves but suspected the former lessee was less than dilligent about oil changes. Switched to M1 synthetic figuring it will slowly clean and all was well.
Fast forward another 25k mi and i get a check engine light for low oil pressure and camshaft timing. Dealerhip finds a blown oil gallery gasket (not uncommon) and goes to replace under warranty. Turns out the engine is kinda gross inside an and the gallery is sludgy, as is the cam actuator.
I think my slow cleaning with M1 is starting to break things loose. Dealership has replaced the front timing cover, timing chain and tensioners and one of the VVT actuators that was failing. They also cleaned up that area of the engine and the oil pan and pickup.
I'm left with a connundrum. Do i keep slow cleaning and risk more crud breaking lose elsewhere in the engine or do a hail mary with a fast flush to try and clear out as much as i can, then continue with short OCIs?
Fast forward another 25k mi and i get a check engine light for low oil pressure and camshaft timing. Dealerhip finds a blown oil gallery gasket (not uncommon) and goes to replace under warranty. Turns out the engine is kinda gross inside an and the gallery is sludgy, as is the cam actuator.
I think my slow cleaning with M1 is starting to break things loose. Dealership has replaced the front timing cover, timing chain and tensioners and one of the VVT actuators that was failing. They also cleaned up that area of the engine and the oil pan and pickup.
I'm left with a connundrum. Do i keep slow cleaning and risk more crud breaking lose elsewhere in the engine or do a hail mary with a fast flush to try and clear out as much as i can, then continue with short OCIs?
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