Forenza (Lacetti) Cold start Noise . . . Bdddt Bddddt

[rev320]

I live in chilly Wisconsin. When I first start my Forenza in the cold weather, I hear a fairly loud intermittent raspy vibrating noise coming from the engine compartment. It goes away after a minute or so, but it isn't pleasant.

I took it into the dealer and the tech looked to make sure the timing cover wasn't put on wrong. This morning he started other cars on their lot, and they made the same noise. I think he's out of ideas.

It isn't a big deal, but I'd like to silence this beast.

Anybody have the same experience, or better yet, does anybody have the solution?

[kinkyllama]

Whats the tempature? Its been about 30 degrees here and i havnt ran into the problem.. but my car was never turned off for more than 3 hours or so

[rev320]

Temp's here have been ranging from 10 F to 40 F. The colder the morning, the longer the noise lasts. If I could get to last for more than a couple of minutes, I'd have it pinpointed.

[AcingTeam]

Solution: get a loud exhaust, so when you start up the car that's the only thing you're going to hear lol.

[GsiTurbo]

Could be one of two in a brand new car:

- oil is of too low old viscosity, and your valves are tapping due to lack of oil pressure in the lifters
SOLUTION: get 5W30 oil...if the engine has over 5K KM, switch to semi synthetic, and fully synthetic after 10K KM

- noisy PS pump due to thick (cold) fluid
SOLUTION: SYNTHETIC!!!

My 5 cents

[rev320]

Solution: get a loud exhaust, so when you start up the car that's the only thing you're going to hear lol.

I'd really appreciate a little more useful response than this.

Could be one of two in a brand new car:

- oil is of too low old viscosity, and your valves are tapping due to lack of oil pressure in the lifters
SOLUTION: get 5W30 oil...if the engine has over 5K KM, switch to semi synthetic, and fully synthetic after 10K KM

- noisy PS pump due to thick (cold) fluid
SOLUTION: SYNTHETIC!!!

My 5 cents

Thanks, Valve noise or power steering noise I'd recognize. This seems to be more of a hollow plastic rattle that occurs at certain engine speeds. Think exhaust system rattle, but less metalic. I listened to it a little while ago with the hood up, and it sounds like either something is shaking inside the plastic intake assembly, or the serpentine belt is flopping against the timing cover. . . but I don't see any marks on the cover . . . yet.

[MMamdouh]

Well... the symptoms are like bad crank bearings but i don't think you have that problem as your car is fairly new to have such a problem... right?

noise related to cold weather are strongly related to oil... is your oil too thin?? (got low viscosity??) are you using synthetic oil or regular??

actually ican't help much unless i hear the sound myself so if you can record it and send us a link it will be great... other than that try to check your oil and use a more viscosity oil or try synthetic.

MMamdouh

[AcingTeam]

Solution: get a loud exhaust, so when you start up the car that's the only thing you're going to hear lol.

I'd really appreciate a little more useful response than this.

As far as I'm concerned, you're a newbie here and haven't helped anyone yet. We're all friends here and if you can't take a joke maybe you shouldn't be here.

[PrecisionBoost]

Both my Lanos and my Optra 5 make noises when it's cold.... it's the power steering pump..... GM makes a "low temperature" power steering fluid (which was put in my Lanos) but I didn't like how it changed the feel of the steering.

At -30 degrees Celcius both cars are loud for the first little bit.... the lanos was probably twice as loud as my Optra 5.

The Daewoo dealer first tried the low temp fluid.... which helped slightly and then replaced the power steering pump.... which helped slightly more.

Basicly the Lanos would make noise at -15 deg C when I first purchased it and after a new pump and "low temp" fluid it didn't do it until about -23 deg Celcius

My Optra does it at about -25 deg C so I'm not too concerned.

[Mario]

Both my Lanos and my Optra 5 make noises when it's cold.... it's the power steering pump..... GM makes a "low temperature" power steering fluid (which was put in my Lanos) but I didn't like how it changed the feel of the steering.

Just curious, was this fluid DexronIII (Red) or the more common clear fuild found in most GM vehicules? My manual clearly states not to use the common GM Stuff, only a Dexron compatible fluid.

And as 360 Dynamics suggested, I'll switch the PS System to synthetic this summer, I don't like the noise at cold myself. Now I just need to find a suitable way of doing the flush and refill, otherwise I'll pump/refill the tank a few times...

[rev320]

Solution: get a loud exhaust, so when you start up the car that's the only thing you're going to hear lol.

I'd really appreciate a little more useful response than this.

As far as I'm concerned, you're a newbie here and haven't helped anyone yet. We're all friends here and if you can't take a joke maybe you shouldn't be here.

Sorry . . . it's been an incredibly crummy week at work and at home and my sense of humor is temporarily out of order. When I was younger I used to run loud pipes on go-karts and motorcycles and managed to damage my hearing, so that's a kind of a sensitive issue for me. I have been active on other automotive boards and I think I have been pretty helpful there. I plan to be helpful here when I get a little more familiar with my Forenza . . . I've only had it for a week and it has spent 3 days in the shop. Shoulda done it myself, I guess. Maybe I can get my '86 Dodge Lancer back . . . It was a pretty dumpy car, but I could take it completely apart and put it back together in the dark. (Don't ask me how I learned.)

The noise on my Forenza is not due to thick oil or worn components. I'm convinced that something is just shaking and rattling during the initial fast idle warm up period, when the engine is not as smooth. It happens mainly when the car is just started and in put in reverse. This would cause the engine to tilt slightly forward on its mounts The air cleaner box is on the fender well on rubber mounts and is connected to the engine by a fairly stiff hose. Maybe it's being pushed forward and is vibrating against something. When I rap on the box with my knuckles, the pitch of the sound is about the same, and the sound comes from that general area. Like I said, it sounds kind of like a misaligned exhaust pipe hitting something, except more plastic.

[AcingTeam]

I had a problem close to yours after my unsuccessful experiment with a new performance header. The guys at the shop put back my stock exhaust and the pipes were hitting/rattling on every bump. Even when I start the car, it would rattle. Took it back to them and they fixed it.
But your car is stock, right? So.... and the noise goes away, so that can't be it.

[rev320]

I had a problem close to yours after my unsuccessful experiment with a new performance header. The guys at the shop put back my stock exhaust and the pipes were hitting/rattling on every bump. Even when I start the car, it would rattle. Took it back to them and they fixed it.
But your car is stock, right? So.... and the noise goes away, so that can't be it.

Yes, and it'll probably remain stock even after the warranty expires . . . in 2012. This car is a station wagon meant to haul stuff back from the lumber yard, and to take my daughter back and forth to college. (Yes I am approaching geezer status.) When I get the car back from the shop, I'll take a few things apart around the air box and look for rub marks.

[TheGreatAndPowerfulOz]

Yeah! Newbie! *looks at AcingTeam* Sheesh ... only in the mid 700's post count. *shakes head*
You newbies really need to know your place around the forum!!

:P

LOL

:twisted:


Cliff

[AcingTeam]

Yeah! Newbie! *looks at AcingTeam* Sheesh ... only in the mid 700's post count. *shakes head*
You newbies really need to know your place around the forum!!

:P

LOL

:twisted:


Cliff

LOL OZ, stock hi-jacking other people's post you noob!!