Prius C :: 2015 - Cold Start With Vicious Knocking
Oct 19, 2015
Last night I experienced a somewhat troubling event. My C had a horrendous knocking on a cold start @40 Fahrenheit or so. Shook the whole car. It lasted about 3-5 seconds, and ran perfectly afterwards, even making another cold start later on @30 without issue.
How worried should I be, and what's my recommended course of action?
2015 Prius C TWO, not II as uppercase roman numerals were used for model year 2010 Prius, w/5616 miles
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We have had a few mornings (in garage) where it would seem to not really id say a knock but maybe a clicking sound and it would quit right away. This morning that did not happen so i shut the car off and checked oil it was low.
Got under the car and can not see any leaking no oil on ground. So i had a QT i put in and that seems to quiet it after a few seconds.
I called local TOY dealer and they said its common for 2010 to use some oil and not much they can do. I thought what is a little it was at the end of the dipstick.
They said they can only fill it up and then have me come back in 1400 miles and see how much is used.
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2005(its NF model) Sonata 2.4 petrol manual. 75000 miles. On cold start makes knocking sound( sound like Diesel). After coupe of minutes when warms up the knocking sound gone.
Also when i start driving( still on cold engine) i hear that sound only when i let go from gas pedal and only in range of 1800-1500 rpm. When i accelerate i don't hear that knocking sound.
I think is not belt tensioner because sound is much longer than couple of sec.
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My 2003 F-150 knocks pretty bad on my early morning cold start ups. It only happens if it had set for a while. Its not a knock coming from the bottom end it sounds like its coming from the top end, cams cam followers... etc. I was wondering if I should be concerned. I am running 5-20 mobil 1 with a motorcraft filter. My truck always seems to use a half a quart to a quart between oil changes too. The truck only has 60,000 pretty mild miles on it.
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Recently, our 2009 Sonata jumps to relatively high and not normal RPM when start cold (and I don't mean winter-cold; I mean first start in the morning). It jumps to around 2500 rpm for 3-4 seconds before it goes down to the normal 1200-1300 or so for a cold start.
Also, not sure if this is the normal Sonata engine sound, but when we push the accelerator it sounds like the engine is knocking, almost like a whistle of fuel flowing.
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There's a thread similar to this on the front page, but I wouldn't exactly describe my issue as a "rattle".
I've got a good video of the sound it's making here : [URL] .....
It's definitely much louder with the hood up--doesn't seem quite as drastic when sitting in the driver's seat.
I've come across the thread here on the engine rattle/knock fix, but I'm not sure if this is the same thing. Would this be considered a knock?
It's a 2011 Elantra with about 82,000 miles on the odometer. It has an extended warranty on it, in addition to the 100,000 mile powertrain warranty on it, so it's at the dealership this morning.
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I have a 2002 Pontiac Grand AM GT with 151,000 miles (I have had the car for 6,000). I recently just changed the oil with 5w-30 which is the 3rd oil change I have done and have used the same brand and viscosity. It seems the oil is a little overfilled this time (maybe 1/4-1/3 of an extra quart). I noticed a knocking coming from the engine (closer to bottom of engine than top) on a cold start. It sounds like a rock being knocked against a hard surface. I can only hear the knocking if I am outside of the car, if I am in the car I can't hear it at all. The knocking lasts for maybe 20-30 seconds. If I press the accelerator (when in park) the knocking goes away, and if I let off the accelerator then it comes back. I can't really test to see if the knocking persists while driving since I can't hear it from the cab.
I know I should do all the routine maintenance when getting a used car (spark plugs, etc), but I bought from a friend who put spark plugs on maybe 25,000 miles ago.
I read that maybe I should be using different viscosity of oil in the summer (even though the manual says 5w-30 all year, I live in North Central Nebraska)? Is the knocking maybe due to the slightly overfilled oil? Should I try to drain that excess out? Should I just go ahead and replace the spark plugs and wires as well?
I drive ~750 highway miles a month and hope I can get this car to last a few years. So far it seems pretty good, have only had to change the ECT sensor and thermostat on it, suspension bushings still look good. I just never heard this noise before and it kind of freaked me out. I probably would have never heard it but I just happen to start the car and needed to grab something from the garage.
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Since I had my 40k service a few months back, I hear a knocking sound for about 3-5 seconds after a cold start (overnight is long enough). It's a pretty loud clicking sound, even worse if the car hasn't been started for a few days.
I brought it to the dealership and they said it's "the sound of the lifters clicking before they get pressurized with oil". They said the oil level is fine. Doesn't seem kosher to me - didn't happen before the 40k service.
Could they have used the wrong oil? Or perhaps didn't put something back together again properly?
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2006 Sonata LX. It's only on a cold start up and lasts for about 30-45 seconds tops..and then it goes away. Car has 74k on it. Treated well. Only use synthetic oil and no check engine lights. Last oil change I put 5w 30 in it. I know it says to use 5w 20. Could this be the problem?
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5.4. So I have a 2004 F-150 that just passed 80,000 miles and a month ago it started making a very loud noise on startup, but only cold startup, meaning if I haven't used the truck in about three hours. Now I went on youtube to research and found a video of a truck making the exact same noise! Here is the link:
2004 f150 cold start knocking noise - YouTube ....
Need to verify what this is??? Some people are saying cam phasers and some are saying I'll need a brand new engine!
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Noticed that when drive Sonata cold without having it warmed up and you hit the accelerator even a little bit that it 'jerks' back a bit? Once the car is warmed up you don't feel it anymore.
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Just got a DSG 2015 GTI 2-DOOR, and after 2 days of ownership, there is suddenly a shudder/vibration when I start the car in the morning.
RPMs start at around 1000, then drop to 750, and then 650, and the car starts to vibrate/shake a bit, almost like a heartbeat...
After engine oil temperature goes to ~80 Celsius, the shudder becomes much less pronounced. This all happens in "P", and doesn't happen in "D".
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I just purchased a 2010 RX 350, has only 7k miles on it. Really, really nice car. I noticed for the first time yesterday the engine ticking/knocking/rattling/whatever you want to call it sound when starting up on a cold start. It definitely goes away after about 5-10 minutes of running.
Most people seem to accept this as "normal". They hear it, live with it, and they never have any problems. I am a new Lexus owner, so I have trouble digesting that such a luxury vehicle with so few miles would have a "normal" engine knocking sound at 7,000 miles.
A few people posted in other places that this is indeed an issue, and should not be happening. There is a a Toyota (Lexus) service bulletin that I didn't get the details on, it is LSB-0028-09. LEXUS: ENGINE TICKING NOISE AND/OR MIL ON P0014, P0015, P0024, P0025, P0017, OR P0018. ENGINE MECHANICAL. *PE
Looking for details on this service bulletin, and if it does indeed apply to the engine knocking sound.
- Premium gas
- High viscosity cold synthetic oil
- Dealer fixes issue
- Other fix?
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I posted a related video in the fuel pump thread here where the high whine noise is apparent several seconds after a cold start. Now from inside the cabin, looking at the revs, the "sewing-machine-like" whine disappears above 1200 rpm.
High-pitch noise below 1200 rpm - YouTube
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I am a proud and recent owner of a 2015 Sonata Sport 2.0T!
Car looks amazing and am very happy with it.
But lately I have been noticing lots of drone noise coming from the engine, and a really loud cold start as well. The "cold start loudness" goes away after a little bit of driving.
Was wondering if this is just the way the 2.0T sounds, or should i get it checked?
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My 2015 f350 6.2 truck started making this whine noise..... Sounds like a bearing..... Stops at 40 seconds.. [URL] .....
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Just last night my '05 Prius transmission developed an intermittent knocking/juddering sound at start-up. A few seconds after Ignition ON, the ICE would normally start and the knocking/juddering sound comes alive. In Drive mode at low speeds and gentle throttle, it feels as though the transmission cuts in and out. It seems fine at higher speeds. So far there's no warning light on the dashboard or the MFD.
Is this the early sign of failure cited by Luscious Garage. Gen 2 Prius (2004-2009) Transmission Failure, P0AA6, P0A92, P0A7A - Luscious Garage | Hybrid Specialists
Is it possible to read transmission trouble codes with the Mini VCI or must I bring the car to the dealer for a diagnostic?
Maintenance: 2 fluid drain & refill (33k, 101k) and 1 coolant change at 68k done by Toyota dealers. Current odometer: 152k
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Sometimes I have to park my car two blocks away in the afternoon, and later in the evening i need to park my car back to the spots in front of my apartment.
EV mode won't be enough to last the two blocks, even at 7 bars. Or sometimes the car won't let me turn on EV mode, even at 7 bars (battery too cold).
So the engine must run if i want to park my car back near my apartment. But the two block distance will not suffice to completely warm up the engine
So the next morning... (20~ Fahrenheit)
My car knocks for a few seconds the next morning the car starts up...
What is the definition of completing the warm up cycle? 120F? My car will turn off the engine after coolant temp reaches 120F (ECO mode).
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I've got and love my 2015 GTI w/PP 6MT. Under heavy throttle, as the car loses grip, I experience a rather violent knocking, it's really violent and feels as if it's damaging the car. I'm sure it's one or more of the assists kicking in, but which one; ASC, ESC, XDS+, or is it the VAQ? I'm concerned I'm damaging my car. which systems are the culprit, how do I defeat them, and is this damaging my car?
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Recently, when I start the engine (cold or even warm starts) I hear a subtle knocking noise that doesn't last too long but a few seconds. I figured that maybe it's because our area may still be using winter mix gasoline... but I'm not sure. Also, there's a rattle underneath the car when the engine switches into generating electricity with MG1.
This only happens after a start-up procedure (cold or warm). It stops when I push the gas pedal down a little bit (while still in park) then it goes into charging again, and by that time, it's stopped. I figured it may be a heat shield on the exhaust. It sounds more up in the front.
Also, when I start the car, the engine starts smoothly but then 1-2 seconds later goes into spinning MG1 which makes the car kinda sound like "vrrrrrrr---VRRRRRRRRrrrrrrrrrr...." .
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I have a 2015 Sonata 2.0T and I have noticed knocking noise when driving. I experience it more when on the highway/freeway. I mainly experience it during acceleration. Not hard acceleration but when I want to overtake or when the road curves and coming out of the curve -I step in the gas a bit, I hear the knock.
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