Lexus LS 2007+ :: Engine Knock At Cold Startup
Aug 31, 2014
I recently bought a 2011 460 L, CPO with 28,350 miles. I love the looks and how it drives, smooth! But I do have a concern. Before I go to the dealer I thought I would educate myself from the experienced LS owners. I am hearing a very brief (1-2 seconds) mild engine knock at a cold startup.
This only occurs when the engine is cold and has sat overnight. It never happens after this first startup, even after turning the engine off and then on again. It kinda sounds like the oil isn't getting where it should be for a few seconds. Engine sounds great with normal and hard acceleration throughout the day. The dealership where I bought it is 300 miles away, so I would be taking it to a local dealership.
Now I did hear this noise and mentioned it to the service manager when I first bought the car, and the service manager told me that this cold startup sound is normal. He also mentioned the direct injectors at idle. I guess sometimes it's hard to fully trust what dealerships say. Is he right?
View 13 Replies
Advertisement
It almost sounds like somebody is taking a small hammer and banging at the plastic cover on top the engine when the vehicle is started new from cold. After about 8 or 9 knocks it goes away.
Taking it to a dealer soon to get it checked.
2010 Model year. 81k miles.
View 6 Replies
My 2011 Camry LE I4 with 21k miles has a slight knock after cold startup, at Idle for a few minutes that disappears after warming up. If you start and drive and don't let it warm up the knock, under load, is more pronounced.
View 3 Replies
There was a TSB for 2AR engine, Engine Knock/Rattle Noise at Cold Startup. My question is for those I4 camry owner, do you have these rattle sound when you start your vehicle at cold? I am not sure if mines have the same issue, but pretty sure is I can't find any differences between mine and this clip:
You Tube
So should I take it to the dealer? Or it's normal?
[URL] .....
View 11 Replies
For the past year or so my Santa Fe (49,000KM) the engine will knock for 5-45 seconds when I start it up after its been sitting a while. I asked the dealer and they said this is "normal" and cannot be adjusted.
View 16 Replies
I finally made a recording (attached), I would suggest listening to it with headphones if possible. The noise I'm referring to is featured between the 0:28 and 1:00 marks. You can hear it again from about 1:10 to 1:25.
Just to recap:
2014 GX Premium pkg.
4400 miles
93 Octane always
The sequence of events is such:
1- Car is parked overnight in garage, air temperature is 60 degrees or less
2- Start car, pull out of garage
3- Put car in D
4- Drive to stop sign at end of street
5- The transmission downshifts and engine revs slightly as the car comes to a stop
6- After sitting at the stop for a few seconds, foot on brake, engine at idle, it starts to make that thumping/clunk noise
7- Noise stops once I start moving again, and does not come back once the engine is warmed up
Note: This happens whenever the temperature is 60 degrees or below and the engine is cold/car has been sitting overnight. All accessory systems were shut off for this recording/demonstration (no A/C or heat running, no radio or other accessories on).
View 14 Replies
Our 2007 RX350 with 91,000 miles started an annoying rattle at startup that lasts a couple seconds then goes away. The car drives fine and makes no unusual noise after the initial start. Its definitely not normal as it hasn't done it the last 91K miles we have driven the car.
View 3 Replies
I recently got a 600. On cold startups there are times when it makes a horrible clanking sound when it does its ~2 second low idle. The instant it goes to high idle the sound goes away. After the car has been run, I don't hear the sound again until the next cold start.
This is not normal injector click, and if it is valve click there must be a side issue causing it. Like an oil primer working intermittently or something.
[URL] ....
View 6 Replies
Twice this week our 2009 SantaFe (3.3l) had a squeal from the engine upon cold startup. The first time it was very cold (-20C or so) and this was louder and longer than the second time (-10C or so). The squeal lasted only a few seconds and trailed off to nothing. Each time the heater controls were set on defrost (fyi). In order of likely suspects, I suspect one of the following:
-compressor engaging and causing sudden increase in resistance on the belt or compressor engagement clutch noisy
-idler pulley for some reason causing belt to slip at first, but don't suspect idler bearing as noise disappears right away
-belt slippage due to resistance somewhere else--e.g. water pump or alternator.
This may not happen when I take the vehicle in for its next scheduled maintenance as by then the weather will likely be warmer. This has 76000 km on the clock.
View 2 Replies
I have an 07 SE (manual transmission). In cold climates has noticed a noise at startup on a cold engine when the temperature is below freezing (colder than -5C or so)?
The engine has to be cold (like sat overnight) and the outside temp has to be cold. Then at start when I turn the key, the engine starts fine, but as I release the key from the start to the run position I hear what sounds like the starter motor make a noise (short zipping sound).
At first I wondered if it might be slow to disengage, but if that shouldn't make a noise because the gears should be meshed ok? There is no noise with a warm engine, or with a cold engine on a mild day.
View 14 Replies
My Prius has been sitting in the fridged weather in my driveway. It's Tuesday and the temperature is currently 18F. The last time I drove this car was two days ago on Sunday.
I started it up a few minute ago and heard a HORRIBLE knock or slap from the engine bay. It alarmed me to the point where I wanted to run in and grab my camera but I tried listening to understand what it could be. At first I thought it might be a belt came loose and was whipping around hitting the components but it went away after about 30-40 seconds. It was so loud that I thought the neighbor two doors down who was shoveling snow could hear it.
I will let it sit overnight and will definitely capture this on video in the morning. I have a feeling the noise will be back.
View 6 Replies
I once experienced the noisy engine start up.. It sounded like the engine was trying to run backwards or severe pre-ignition.
View 2 Replies
First: 2007 GX470 with 63k miles
On some 'cold' starts (and I use that term very loosely, because it never really drops below 40 degrees here), when the engine has sat overnight, and when I shift into reverse (never Drive, just Reverse) and stand on the brake I get a knock. I don't hear it in Park. Not valve clatter like on my german cars while the oil gets routed to the lifters, but instead a loud, startling deep-down knock that sounds like BAMBAMBAMBAMBAM. Then it goes away. Put it in neutral and the revs rise and it's gone. Put it in Drive and nothing there. Just lasts for maybe 5-10 seconds, but is it loud. BAMBAMBAMBAM! Like someone hitting a 2x4 on the block or tranny housing.
Once I'm past that 5-10 seconds it won't do it again all day. Just after a "cold soak". And perhaps 5-10% of the time.
There is a lot of examples with this motor of what some call "piston slap". Don't know if I have it - and I suppose it might get worse (to the point where I hear it) when the engine is cold and under load (in gear), but I don't get it in Drive. Just Reverse.
View 9 Replies
Bought 2009 santa fe new [3.3]. after cold start up tac is moving up and down and it seems to be missing. After temp is reached tac is steady but there still seem to be a hesitation when driving. 21,000 miles on vehicle. could it be a bad tbs?
View 4 Replies
I have a 2006 Corolla LE with about 93,600 miles.
It was about 16 degrees Fahrenheit this morning and I drove on a cold start, and noticed the engine knock a bit when idling. Later noticed check engine light come on. After the car fully warmed up, 15 minutes later, the knocking seemed to subside.
I don't think I've replaced the spark plugs in the longest time, so could it be this issue?
View 18 Replies
I bought a 2007 Mini Cooper, used, at a Ford dealership in August of 2010. For nearly two years I loved this car and didn't have to pay much in the way of maintenance. I bought the car at 55k miles, and now it has 92k. Over the past year, I have noticed a rattling noise at cold startup, and it was especially loud in the winter, and I also noticed that the car consumes oil. As the oil got lower, the rattling got worse, and whenever I topped off the oil the rattling stopped. I brought this up at the MINI dealership (where I get all my repairs on the car) during a routine oil change and they didn't take it seriously.
Well, Tuesday morning on my way to work, there was a sudden loss of power and the engine started missing bad. I was almost to where I work when the car just couldn't hold and idle and stalled. It wouldn't turn over after that and it sounded really "sick". I had the car towed to the dealer, where they told me the timing belt tensioner failed and it allowed the timing belt to jump "a great distance". Apparently, these are "interference" engines (a term I learned because of this incident) so the screwed up timing destroyed the engine. The dealer said it will cost 8,000 to completely replace the engine.
View 19 Replies
I have a 2003 Mitsubishi Diamante that I have owned since 2008 purchased it with 60,000 miles on it. Currently has 131,000 miles. I have always kept my car in good running condition and performed all of the scheduled maintenance per the owners manual. Last month I noticed a slight cold knock on the right side of the engine that would go away when the engine warmed up. I checked the oil and noticed that it was a little bit low (maybe half a cm below the lower threshold on the dip stick). I added oil and continued to drive it, still knocking.
Bought some sea foam thinking it was the lifters and sprayed a can in the intake and poured some in the oil. Then changed oil with 5w-30 synthetic, have been driving it for about 500 miles now and the cold knock seems to be getting worse and I can faintly smell burning oil when it is idling as I let it warm up before driving off. By the time I get to work the knock is essentially gone. My oil levels have been fine... My question is, should I be explaining to my wife and fiscally responsible self, that I need to be looking for a new (read used) truck sooner than I had initially planned? Or, is this something that can/should be addressed or just drive it until it gives out...
View 15 Replies
Specs: 2003 Ranger Edge / 3.0 V6 / 5-speed 4WD / 238,000 miles
Yesterday my truck was in the shop for repair. Intake gasket, Transmission fluid change, all heater hoses, thermostat, serp belt and coolant flush. When I picked it up from the shop, which was after closing, I noticed a knocking on start up. From past experience on a different truck, it sounds like a cam that isn't oiling. After a few minutes the knock goes away. I drove for a few miles, turned off the engine and started it back up and no knock this time. This morning I started it, knock was back but went away after a few minutes. Oil was changed about 1500 miles ago. Running pennzoil 5/20 with a K&N filter. Up until yesterday the engine has been completely quiet. Was wonder if something may have clogged the filter or the drain back valve.
View 6 Replies
2011 Santa Fe 3.5 L
I've isolated this rattle down to the cam phaser( CVVT) in the right cylinder head. It rattles bad for 2-3 secs on cold start or after it sits for 3 hours.
I've put in 5w20 synthetic oil and synthetic Lucas additive and it cleared up the noise for short interval start ups.
I changed the cam phaser in the right head with a used one ( 40k ) but it didn't make a difference. I should change out the attaching cam as well.
View 21 Replies
I've noticed something very strange today with my Lexus. It was -8, in Toronto, and I had to start my car quickly and drive it. The engine was still cold, but I had to leave early. The odd thing which happened, is that after driving slowly and coming to a stop, for a stop sign, the car wouldn't go, though it was on drive. The car was still cold. It seemed, that the tranny wouldn't switch gears.
I brought the car to a total stop, and put it to a parking position, then drove again for a couple of feet, and the tranny wouldn't go again. I waited for the car to warm up a little bit, and the care drove normally after. Is it normal like that? Do we have to wait for the car to warm up? Or there's something wrong with my Tranny.
View 3 Replies
Loud engine grinding noise accelerating from stop when you first start the car? It is right after cold start, lasts 10-15 seconds until I get to 30-40mph. Engine sounds normal otherwise.
2008 LS600hl with 28K miles
View 4 Replies
