ICE "Grinding" Noise At Low RPM (2015)

jadd806 · Jul 13, 2019

gcary said: ↑

How much oil is your Prius burning at 140k. My 2010 has 162k and burns a quart every 700 miles or so. I have a sound that really sounds like preignition to me. Very similar to yours. The throttle load conditions that induce the sound very closely match yours. I’m wondering if it is carbon build up from the oil consumption. The sound gets worse as ambient temperature rises. We drive 180 miles a day for work commute.

I changed my PCV and cleaned my intake EGR ports and EGR tube at 120k as the engine was missing during light throttle due to 3 of 4 ports being fully clogged. This literally blows out the spark in the last port during EGR active modes. My throttle body was also full of oil as is common.

It is starting to act like the intake needs to be cleaned again as well as the sound. I’m hoping to get 350k out of this engine. Many taxi drivers have told that is about what the engines last.

Don’t be afraid to pull the intake in your apartment parking lot. This car is very easy to work on. The entire R&R took me under two hours using new TB and intake gaskets.

Any thoughts from group? I don’t want to crack a ring or piston land if it is preignition. I’m told the Prius ring are notorious for oil consumption.
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I don't appear to be burning any oil. I've been checking the dipstick every 5k (including right before getting it changed) and I haven't noticed any loss over time yet. Though I believe I read something about the piston rings being redesigned mid-2014 so my 2015 may not be predisposed to burning oil like your 2010.

I'm hesitant to work on the car in my apartment lot since the lease has a clause prohibiting vehicle maintenance and I'd probably get reported by one of the "neighborhood watch" type old ladies. As of right now I'm not hearing anything that would cause me concern so I'm just going to leave it alone.

Have you tried a fuel additive?

gcary · Jul 13, 2019

jadd806 said: ↑

I don't appear to be burning any oil. I've been checking the dipstick every 5k (including right before getting it changed) and I haven't noticed any loss over time yet. Though I believe I read something about the piston rings being redesigned mid-2014 so my 2015 may not be predisposed to burning oil like your 2010.

I'm hesitant to work on the car in my apartment lot since the lease has a clause prohibiting vehicle maintenance and I'd probably get reported by one of the "neighborhood watch" type old ladies. As of right now I'm not hearing anything that would cause me concern so I'm just going to leave it alone.

Have you tried a fuel additive?
Click to expand...

I agree it’s better to play it safe.

I have not tried fuel additives yet but plan to next step. I am also considering doing a piston soak. I love my Prius. I have owned many cars and believe it is one of the best cars I have owned.

ICE "Grinding" Noise At Low RPM (2015)

jadd806 Member

gcary Junior Member

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ICE "Grinding" Noise At Low RPM (2015)

jadd806 Member

gcary Junior Member