my 2010 S has a wicked knock for a couple seconds at startup when cold. it only does it after it has at for a few hours. any ideas what this could be? theres no check engine light coming on.
rieds
^ not much of a lead 'dere !?
"wicked knock"
:dunno:
does it knock when ya turn it over, but engine does not fire
or does it occur when the engine fires ?
is it a single knock, once only ?
how loud ?
Mechanical knock or fuel vapor intake back fire ?
an audio/video would be helpful.
Is the vehicle in park... e brake applied prior to start up ?
parked on flat surface ? Incline ?
are you generous in your maintenance ?
or do you "just drive it 'til it breaks" ? Lol
mileage ?
I'd probably have a mechanic look at that pronto
as it could be something easily corrected...
but could also possibly cause further damage if not corrected promptly.
"wicked knock"
:dunno:does it knock when ya turn it over, but engine does not fire
or does it occur when the engine fires ?
is it a single knock, once only ?
how loud ?
Mechanical knock or fuel vapor intake back fire ?
an audio/video would be helpful.
Is the vehicle in park... e brake applied prior to start up ?
parked on flat surface ? Incline ?
are you generous in your maintenance ?
or do you "just drive it 'til it breaks" ? Lol
mileage ?
I'd probably have a mechanic look at that pronto
as it could be something easily corrected...
but could also possibly cause further damage if not corrected promptly.
it starts as soon as the engine fires. last about 2 seconds. only happens after its sat for 5 hrs or better. doesnt matter if its on flat, inclined or declined surface. oil has been changed every 5000. has 92,000. sounds more like a fuel knock. not a ping. i'll try to get a video this weekend or after work one day this week. almost sounds like it's coming from the passenger side. i'm wondering if its maybe slop in the belt.
vvt-i 1.8L ?
could it be the vvt-i system causing the noise.
Proper oil level, changes, viscosity ?
other discussion on topic...
http://www.corolland.com/forums/index.php?/topic/23461-noise-when-starting-2009-corolla/
quick view of the vvt-i's internal function...
love the entertainment :thankyou:
more in depth/serious break down/movement...
could it be the vvt-i system causing the noise.
Proper oil level, changes, viscosity ?
other discussion on topic...
http://www.corolland.com/forums/index.php?/topic/23461-noise-when-starting-2009-corolla/
quick view of the vvt-i's internal function...
love the entertainment :thankyou:
more in depth/serious break down/movement...
It sounds like the classic VVTi rattle. If it's any consolation... my 2013 Corolla LE has had it since about 2k miles and I've owned it since it has 2.5 miles brand spanking new.
They have a "new part" they'll put in there for you but in my extensive reading and conversations with mechanics... it works about 30% of the time. Most of the handful of Toyota mechanics I've talked to don't believe that it should work as a fix at all. That it is just a characteristic of the design... not a good one... but a characteristic trait nonetheless. Honda is dealing with this also lately.
A recording would help us also make sure it's not a real rod knock. but the cool down time and then the noise and the short duration are dead on for the VVTi rattle as it has become termed.
They have a "new part" they'll put in there for you but in my extensive reading and conversations with mechanics... it works about 30% of the time. Most of the handful of Toyota mechanics I've talked to don't believe that it should work as a fix at all. That it is just a characteristic of the design... not a good one... but a characteristic trait nonetheless. Honda is dealing with this also lately.
A recording would help us also make sure it's not a real rod knock. but the cool down time and then the noise and the short duration are dead on for the VVTi rattle as it has become termed.
Yep, VVti actuator. Now you get to decide if you want to have them replace it. If the dealer has done it before... They probably can't hurt it if they have done a few before. If not, they'll use it as a learning tool which may be good or bad.
Me, I have zero trust in our nearest dealer and have seen some wild habits there. I'd have no doubt that the various little grey sensor plugs would be yanked off by the wire like a teenager would and then more intermittent unprovable problems begin. And back I go over and over to chase down what they messed up by manhandling things hungover.
Me, I have zero trust in our nearest dealer and have seen some wild habits there. I'd have no doubt that the various little grey sensor plugs would be yanked off by the wire like a teenager would and then more intermittent unprovable problems begin. And back I go over and over to chase down what they messed up by manhandling things hungover.
Does it sound like this?
I had the rattle issue like the video with my 2009 vibe 1.8l with 50kmiles on it. I ended up changing my intake vvti cam gear to fix the issue as gm never recalled it.The new gear from the toyota looked different than the original it had an extra steel dowel on the out side as compared to the original where it was on the inside. My rattle on start up went away.
http://www.justanswer.com/toyota/7eghq-toyota-corolla-procedure-replacing-inlet.html#re.v/266/
I had the rattle issue like the video with my 2009 vibe 1.8l with 50kmiles on it. I ended up changing my intake vvti cam gear to fix the issue as gm never recalled it.The new gear from the toyota looked different than the original it had an extra steel dowel on the out side as compared to the original where it was on the inside. My rattle on start up went away.
http://www.justanswer.com/toyota/7eghq-toyota-corolla-procedure-replacing-inlet.html#re.v/266/
This is pulled from Metalbones post
http://www.toyotanation.com/forum/3...engine-transmission-forum/301528-tsb-engine-knock-rattle-squeak-cold-start.html
T-SB-0087-09 - March 13, 2009
Brief Engine Knock/Rattle Noise at Cold Startup
Service Category: Engine/Hybrid System
Section: Engine Mechanical
Market: USA
Applicability:
2009 Corolla - Engine(s): 2ZR. Transmission(s): 4AT, 5MT. VDS(s): BL40E, BU40E.
2009 Matrix - Drive Type(s): 2WD. Engine(s): 2ZR. Transmission(s): 4AT, 5MT. VDS(s): KU40E
Introduction:
Immediately following a cold soak startup, some 2009 model year Corolla and Matrix vehicles may exhibit a brief knock/rattle noise from the engine compartment for approximately one second. Follow the repair procedure below to address customer concerns.
Parts Information:
Previous Part Number: 13050-0T010. Current Part Number: Same. Part Name: Gear Assembly, Camshaft Timing. Qty: 1.
Previous Part Number: 11213-37020. Current Part Number: Same. Part Name: Gasket, Cylinder Head Cover. Qty: 1.
Previous Part Number: 11159-37010. Current Part Number: Same. Part Name: Gasket, Camshaft Bearing Cap Oil Hole. Qty: 2.
Previous Part Number: 13552-0T020. Current Part Number: Same. Part Name: Gasket, Timing Chain Tensioner. Qty: 1.
Warranty Information:
OP Code: EG9006. Description: R & R Camshaft Timing Gear Assembly. Time: 1.5. OFP: 13050-0T010. T1: 06. T2: 40.
Applicable Warranty:
This repair is covered under the Toyota Powertrain Warranty. This warranty is in effect for 60 months or 60,000 miles, whichever occurs first, from the vehicle's in-service date. Warranty application is limited to correction of a problem based upon a customer's specific complaint.
http://www.toyotanation.com/forum/3...engine-transmission-forum/301528-tsb-engine-knock-rattle-squeak-cold-start.html
T-SB-0087-09 - March 13, 2009
Brief Engine Knock/Rattle Noise at Cold Startup
Service Category: Engine/Hybrid System
Section: Engine Mechanical
Market: USA
Applicability:
2009 Corolla - Engine(s): 2ZR. Transmission(s): 4AT, 5MT. VDS(s): BL40E, BU40E.
2009 Matrix - Drive Type(s): 2WD. Engine(s): 2ZR. Transmission(s): 4AT, 5MT. VDS(s): KU40E
Introduction:
Immediately following a cold soak startup, some 2009 model year Corolla and Matrix vehicles may exhibit a brief knock/rattle noise from the engine compartment for approximately one second. Follow the repair procedure below to address customer concerns.
Parts Information:
Previous Part Number: 13050-0T010. Current Part Number: Same. Part Name: Gear Assembly, Camshaft Timing. Qty: 1.
Previous Part Number: 11213-37020. Current Part Number: Same. Part Name: Gasket, Cylinder Head Cover. Qty: 1.
Previous Part Number: 11159-37010. Current Part Number: Same. Part Name: Gasket, Camshaft Bearing Cap Oil Hole. Qty: 2.
Previous Part Number: 13552-0T020. Current Part Number: Same. Part Name: Gasket, Timing Chain Tensioner. Qty: 1.
Warranty Information:
OP Code: EG9006. Description: R & R Camshaft Timing Gear Assembly. Time: 1.5. OFP: 13050-0T010. T1: 06. T2: 40.
Applicable Warranty:
This repair is covered under the Toyota Powertrain Warranty. This warranty is in effect for 60 months or 60,000 miles, whichever occurs first, from the vehicle's in-service date. Warranty application is limited to correction of a problem based upon a customer's specific complaint.
well now i cant decide if it's worth fixin after reading the post above. the car still runs great, gas mileage is as good as ever, if it's something thats not gonna be a problem i can deal with it cause i'm gonna drive the car till it dies or i get sick of it which may be soon. i've never had a fast car so i've got my eyes on a mustang, challenger, or maybe a frs for gas mileage.
If this is left will there be further damage to the engine? If it is just a noise I can handle it but it seems like this is going to be an expensive repair otherwise...
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