2008 Volvo C30 T5 engine trouble

mirroredeyes · Post by **mirroredeyes** » 28 Oct 2016, 15:51

Hey guys... my 2008 Volvo C30 T5 is having some major issues i believe... here is the situation.

(Cold Start Tin can sound)

(Warm Start lots of smoke and weird rumbling backfire?)

Ever since i got the car 2014, on cold starts ( watch video 1 ) that sound you hear stays there until 20-30 seconds of accelerating then it goes away as the car becomes operating temperature.

Today the same thing happened like usual... and it went away after it was warmed up. I was cruising 80km/h and decided to up it by accelerating up to 4k RPM and heard a faint sound of that cold start tinny sound again, right under my hood passenger side.

I got home hooked up my OBD scanner and looked for any codes... couldn't find any besides a crap load of "missing signal/Low signal"

I recorded 2 videos for you guys, of my exhaust. I NEVER heard it rumble like that... and i let the car rest for 10minutes before starting it to record.

It keeps white smoking now and a LOT of condensation when revving it

Please help, my mechanic is booked solid for 2 weeks and i need transportation to work and school.

We believe its the oil trap plugged, 106k miles currently and did the timing belt at 105k.

My mechanic can do the job for $400. But the dealership want $540 should i let the dealer do it? i really need the car.

I live in Canada Ontario, current temp was 54 Fahrenheit/ 12 Celsius.

Post by **MadeInJapan** » 29 Oct 2016, 07:27

Make sure that your oil trap is not covered under a warranty. Many of them were as there was a design flaw. The car does rev higher when you start it for 30 seconds. This is to allow the oil to recirculate (location of oil filter is up from previous versions) and then you're good to go. However, the fact that the tinny sound is now when driving and the TB was just done about 1000 miles ago, I suspect that the timing is just slightly (a tooth or 1/2 tooth) off or they did not get the CCVT correct. It would be worth your mechanic checking that. If this is the case, then hopefully he'll get it right as he did the TB right? I would be tempted to drive a different car (just in case) until your mechanic has time to look at your car. However, check with your dealer on the recall of the PCV (oil trap) for your car. Typically though, it's a whistling sound more than a tinny sound when these are getting clogged.

mirroredeyes · Post by **mirroredeyes** » 29 Oct 2016, 19:52

MadeInJapan wrote:Make sure that your oil trap is not covered under a warranty. Many of them were as there was a design flaw. The car does rev higher when you start it for 30 seconds. This is to allow the oil to recirculate (location of oil filter is up from previous versions) and then you're good to go. However, the fact that the tinny sound is now when driving and the TB was just done about 1000 miles ago, I suspect that the timing is just slightly (a tooth or 1/2 tooth) off or they did not get the CCVT correct. It would be worth your mechanic checking that. If this is the case, then hopefully he'll get it right as he did the TB right? I would be tempted to drive a different car (just in case) until your mechanic has time to look at your car. However, check with your dealer on the recall of the PCV (oil trap) for your car. Typically though, it's a whistling sound more than a tinny sound when these are getting clogged.

From the video what do you suspect that tinny sound is coming from or what is producing it?

This was making the sound even before i ever got the 1st timing belt done, my mechanic also told me he locked the Crankshaft so the gears wont move (i think that's what he locked not quite sure) We did hope the timing belt and pulley would stop the sound

by the way after i let go of the gas, how come it makes the rumbling sound? i never had that before.. i dont think

heres another video

Post by **MadeInJapan** » 30 Oct 2016, 11:22

Oh wow, hard for me to diagnose from here. Rumbling sounds almost as if muffler or tail pipe isn't secured well... or it could be a catalytic converter that has loose stuff inside. It might also be worth checking the exhaust manifold where it is bolted to the engine- that it's good and tight and not cracked. The tinny sound, I'm really not sure of. The "smoke," I'd say that's condensation unless it really occurs too after the car is warm and running for awhile. You're in Canada so colder weather and warmth of the exhaust will cause what looks like smoke. All of my cars do that even down here in the South when the temps go down...usually though a few miles down the road and the "smoke" is decreased substantially.

mydamnvolvo · Post by **mydamnvolvo** » 30 Oct 2016, 11:28

Sounds like a jumble of things. May be a coolant delivery issue with the noise at upper rpm and white smoke. Keep us posted.

mydamnvolvo · Post by **mydamnvolvo** » 30 Oct 2016, 11:35

Ok, now that I got the links to work, it sounds worse. Take a cotton swab and rub it around the tailpipe after the car is cold, (or just use your finger) Is it black black black, blueish, or just sooty? Now, are there any leaks? I wish you the best.

Edit: check dipstick, is oil clean? When was last oil change?

T5&D5 · Post by **T5&D5** » 30 Oct 2016, 12:43

The tinny sound is normal silencer baffle degradation, your exhaust is 8 years old I presume ?
the burble on overrun is a air leak in the exhaust , probably a split in the flexi hose beneath the silver mesh.
The "white smoke" looks like condensate. Not Smoke . vapour is not smoke .
Hypochondria methinks , but give any normal mechanic a sniff of this. And you will be taken for hundreds of dollars.
Try checking the tightness of the exhaust manifold nuts , turbo flange nuts ect . easy to do , it may help the rasp , or it may not.

mirroredeyes · Post by **mirroredeyes** » 02 Nov 2016, 06:05

T5&D5 wrote:The tinny sound is normal silencer baffle degradation, your exhaust is 8 years old I presume ?
the burble on overrun is a air leak in the exhaust , probably a split in the flexi hose beneath the silver mesh.
The "white smoke" looks like condensate. Not Smoke . vapour is not smoke .
Hypochondria methinks , but give any normal mechanic a sniff of this. And you will be taken for hundreds of dollars.
Try checking the tightness of the exhaust manifold nuts , turbo flange nuts ect . easy to do , it may help the rasp , or it may not.

aha ya im 16.. im pretty hypochondriac. The raspy noise of the exhaust is gone now... im so confused why

i notice if i drive my car for 15minutes and more the sound comes back, and then my exhaust sounds like that. but startup and driving at the beginning is fine. im assuming something is dying out maybe something in the oil trap

mirroredeyes · Post by **mirroredeyes** » 02 Nov 2016, 06:16

mydamnvolvo wrote:Ok, now that I got the links to work, it sounds worse. Take a cotton swab and rub it around the tailpipe after the car is cold, (or just use your finger) Is it black black black, blueish, or just sooty? Now, are there any leaks? I wish you the best.

Edit: check dipstick, is oil clean? When was last oil change?

ill keep you updated next week when it goes into the shop, it seems like it occurs if i drive the car for 15minutes or longer.

i checked my dipstick and the oil is good and gold still need changed at 105000miles and im at 106540 miles.