Rayd502:
Happy new year folks...

I recently did oil change for my a car,its a Toyota camry 2010 2.5L engine.Due to how busy i was during the service i didnt supervise.


I was driving days later when i saw oil lamp sign flashing on the dash board,i quickly pulled over and called my regular mechanic who inspected and discovered that the oil filter used was virtually disintegrated since it was small and was not appropriate hence blocking the flow of oil.

The filter was replaced with the right one and the flashing stopped.However,next day on cold start up i heard this rattling sound coming from the engine for like 2/3 seconds.Although car drives normal with no other issues.

How can it be fixed and what effect does it have on the engine?

NB:Sound only comes up on cold start.

CC:Gazzuzz,Ikenna351,others.

Please help.

Rayd502:
Happy new year folks...

I recently did oil change for my a car,its a Toyota camry 2010 2.5L engine.Due to how busy i was during the service i didnt supervise.


I was driving days later when i saw oil lamp sign flashing on the dash board,i quickly pulled over and called my regular mechanic who inspected and discovered that the oil filter used was virtually disintegrated since it was small and was not appropriate hence blocking the flow of oil.

The filter was replaced with the right one and the flashing stopped.However,next day on cold start up i heard this rattling sound coming from the engine for like 2/3 seconds.Although car drives normal with no other issues.

How can it be fixed and what effect does it have on the engine?

NB:Sound only comes up on cold start.

CC:Gazzuzz,Ikenna351,others.

Please help.

Connoisseur:
I have had mine for over two years; 2007 Toyota Avalon. I had a bump brush against the oil sump, the rattling sound comes on cold start and you won't hear it till the next morning.

GAZZUZZ:


when an engine looses oil pressure the first parts to suffer are the the parts at the top of the engine, camshaft, chain guides cam lobes etc. The next to follow are the crankshaft/bearings. As it is your engine narrowly survived a fatal engine freeze which would have been detrimental to your pocket. The design of the 2ar/2GR engines are awesome, oil flow/passages are over engineered, they provide protection over and beyond the call of duty.

Engine has suffered instant wear and tear that would have taken 5-10years to achieve by the actions that just happened. You can ignore the startup noise and engine will continue to serve without any further damage, or you can decide to rebuild the engine.

The options are yours.

Gazzuzz

Www.Gazzuzz.com
+2348033910382
Mainland Lagos.

HeavenlyBang:
Hmmm.
Does it come back when you rev? You could be dealing with rod knock.

Rayd502:


It doesn't...Only on cold start in the morning.

HeavenlyBang:

Just low oil pressure on cold startup, then. Gazzuzz pretty much has the gist of it. Since it's a short knock, you won't be dealing with much extensive damage over time. Live with it or rebuild.

If it ever becomes more severe, rebuild immediately.

Bolts used to secure the variable valve timing control device can become loose, causing the vehicle to stop while being driven. Early warning for this condition can be identified as a brief rattle noise for approximately 1 second upon a cold start-up.

Description of Problem:
The subject vehicles are equipped with a Variable-Valve Timing (VVT) system which controls the camshafts to provide optimal valve timing under certain driving conditions. The bolts used to secure the housing and sprocket of the intake-side VVT gear assembly could become loose due to abnormal impacts generated within the gear assembly immediately after a cold start-up.

If this occurs, the VVT gear will not control the intake valves correctly. In certain cases, the VVT gear housing and sprocket could separate and result in the engine stopping while the vehicle is being driven, increasing the risk of a crash.

Toyota theorized that the condition could be related to an engine noise issue at start-up being investigated on certain engines. The VVT internal component could rattle when the lock-pin, which latches to the VVT housing and secures the internal components to maintain the camshaft in the most delayed position, unlatches at cold-start. Toyota conducted reproduction testing and was able to duplicate noise but was unable to duplicate the loose bolts condition.

Through reproduction testing, Toyota confirmed that, with the lock-pin disengaged during a cold engine start, the impact force between the VVT internal component and the housing could become larger if engine oil, which is pumped into the VVT unit to control the position of the camshaft, drains back into the oil pan while parked. In addition, Toyota theorized that the impact force varies in specific engine types due to cam profile and intake valve spring load. Toyota continued its investigation and testing to clarify the relationship between the impact force exerted inside the VVT housing at cold-start and bolt loosening.

mayor2013:
You were close to having an engine lock. Here is another question here for you. What viscosity of engine oil have you been using. Expect to have the following changed

1) timing chain
2) timing chain damper
3) camshaft sprocket
4)timing chain adjuster (upon inspection)
5) camshaft bearings( upon inspection)


Lastly I hope your engine is sludge free. Reason for the question, if otherwise that's more commitment of funds What engine type do you have in it

Rayd502:


Engine type is 2.5L 4-cylinder 2AR-FE engine...I actually switched from the 0w-40 to the recommended 5w-30 oil type.

But the main culprit like I said earlier and upon inspection was using a wrong oil filter which was found to be disintegrated thereby causing a blockage leading to loss of oil pressure.

Thanks for your input.

jarkbauer:

I dont think its up to 3secs. 3secs is very long.

mayor2013:
Engine needs to be split up

mayor2013:
Engine needs to be split up

Rayd502:


Is there any effect detrimental to the engine if i continue to live with it?Car drives normal...

jarkbauer:



Engine needs to be split up? whats that? making things complicated? google cold morning rattle camry. It is everywhere on the internet. You can even get a technical release on how to fix it. But it an expensive fix.

GAZZUZZ:
Now you have confused the poor man.

mayor2013:
Hi

So how did your Google say it would be fixed. How do you change a timing chain guide for instance without taking things apart. Too much of a rush huh!! Calm down

mayor2013:
Engine needs to be split up

Rayd502:



Not sure I want any kazeem ripping into the engine for the noise.it cld get worse...How i wish peeps like Gazzuzz are close by.

HeavenlyBang:

Carry am come gimme, I go fix everything.

Rayd502:


Engine type is 2.5L 4-cylinder 2AR-FE engine...I actually switched from the 0w-40 to the recommended 5w-30 oil type.

But the main culprit like I said earlier and upon inspection was using a wrong oil filter which was found to be disintegrated thereby causing a blockage leading to loss of oil pressure.

Thanks for your input.

Rayd502:


It is quite conflicting you know, 0w-20 is written on the engine cap,while on the manual that came with the car 5w-30 was stated as the appropriate oil for this particular engine.

I was using 0w-40 initially because I couldn't lay my hands on 0w-20.