Very loud noise when starting cold

[PaulM]

Hey Guys,

I am having some problems.

During a cold start (either in the morning, or when the engine has cooled down after a drive), right after you start the car there is a very loud buzzing noise.

It only goes away when the engine gets warm, if you accelerate soon after starting the noise comes back at around 2500RPM when accelerating and subsides when the engine gets warm.

Because this sounds like an odd thing, I got some footage of what is happening, sorry about the shaky camera work, but you will get the idea when you see/hear it. From what I can tell it's coming from the top left hand side of the motor.

server3.thegarage.com.au/wp/Camry.wmv (sorry, but you need Windows Media Player to play it).

http://server3.thegarage.com.au/wp/DSCF2910.AVI (high quality)

I also have one more problem (again, only when cold and usually only in the morning).

If I don't let the car warm up (for around 5 minutes) just after I take off the power drops right down, the revs go down to around 500RPM and the car will either struggle up the hill and chug along for a few seconds or stall entirely. If I let the car warm up for over 5 minutes it takes off perfectly and there are no issues. And the acceleration problem goes away after doing it once, so even if I start off cold and let it chug along, right after it's had its fit it will accelerate fine.

Any ideas would be appreciated!

I have a feeling the noise part is a loose plate over the exhaust, but I am not entirely sure.

[chronoti]

i would call it valve tick ...... i use a can of this valvemedic stuff clean mine right up, if you can find that maybe a can of motor flush or some seafoam would clear it up.

the no power thing i would say look at the cold start injector, or clean in the intake

^3vz-fe

[skewe]

what year is ur car?

[BlueFusion6851]

a 94 vienta

[Toysrme]

mmmm That's not valve or lifter noise. They are only moving at like 250-750rpm. Definately not a constant noise like that.


I would check the A/C, alt, timing belt, starter, or a pump. It's something rotating. Narrow it down quickly by using your ear. Where is it loudest? Driver, or passanger side? Front of the engine bay, or rear?

Have you had any belts replaced rescently? When my first timing belt split itself on the highway, I had a similar noise. It was causing the camshaft pullies to rub against the valve cover, grinding metal off of the pulley.


Crank the engine and pull the starter fuse so if it's trying to run, it can't.

Take the A/C belt off. If the Alt and A/C compressor are not rotating, then obviously they can't make noise.

Ditto if you take the P/S belt off.