Car model correction: 2008 Mazdaspeed3 2.3 L turbo
Recently I ran low on oil, and my car randomly stalled. Started it without problems, on the way home I started hearing a knock. Checked oil, was very low but still had enough to operate.
Knock is only heard at 2k rpms, not above not below. Oil light never came on so im guessing my oil pressure’s good. Instantly filled it with 5w-30.
The knock has only gotten less over time and is quieter when the engine is warmer.
Did a test run the other day with my engine to see if it knocked on idle. Got a new p0335 code as I was slightly revving it.
Is it my rod bearing? If so, is it possible to fix it through the oil pan? What’s my best choice?
What makes this problem better or worse?
It’s worse when the engine’s cold, less loud when warm
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Hello, what is "very low but still had enough to operate"? Was there any oil on the dipstick at all? Keep in mind that your engine needs the proper amount of oil to operate without damaging components -- where as by chance, low oil may not immediately contribute to abnormal wear or catastrophic failure -- it also certain can.
I am really sorry, but it does seem like there could be an internal engine noise dur to bearing wear or even valvetrain noise -- I would recommend a trained technician near you observe the noise you are hearing so you can determine what best steps to take next.
As far as repairing, there are very few circumstances where a person can tear down an engine at home and repair a rod bearing; even with tools and a way to lift the vehicle, the ability to inspect and measure crankshaft condition would be very difficult to accomplish, especially with the seriously tight tolerances of mechanical components these days.
Here's a link to contact a shop near you -- someone who can at least listen to your noise:
https://repairpal.com/auto-repair-near-me
