What does knock sound like?

AUSyTyIN

AUSyTyIN

Unbusted $#it box
Not exactly syty related, but it should be universal towards turbo vehicles. I just set the timing on the Omni since it wasway off. Driving home on the highway with the radio off, between boosted fun I heard something I hadn't heard before. I happened while the engine was creating vaccume, which is why I'm not sure if it was knock or not. It sounded like a tiny bell ringing somewhere. Not sure if the sound was even underhood, it could've been something underdash that I had never heard rattle before. God, this car is getting annoying. I wish I could just plug in DM and be done with the F***er :rant:
 
S

syntax

Member
Re: What does knock sound like?

If i had to I'd say it sounds as if you put 2 glasss marbles in a glass jar and shook the jar around.
 
QUICK STORM

QUICK STORM

B.A.M.F. BMW Tech
Re: What does knock sound like?

that my friend is pinging, most likely from a huge vacuum leak. this happened to me before on my black ty, turned out the intercooler to TB hose was loose.

i hope this helps.
 
SYO237

SYO237

SyTy Registry
Re: What does knock sound like?

syntax said:
If i had to I'd say it sounds as if you put 2 glasss marbles in a glass jar and shook the jar around.
Click to expand...

x2 on the marbles
 
AUSyTyIN

AUSyTyIN

Unbusted $#it box
Re: What does knock sound like?

I thought that is what knock sounded like, just wanted to check. I figured it would've knocked at 20+ PSI, instead of 4" hg, but it was worth asking. It doesn't make the sound all of the time, which is wierd. It might have been the DSM BOV I had sitting on the passenger floor hitting a small bolt that lives down there too. It's just a new motor, and I don't want to F* up anything. I still want to use DM on this thing!
 
gkrcr882

gkrcr882

SyTyless......for now!
Re: What does knock sound like?

yup, we had a serious pinging problem on our Sy, our timing was way advanced and we used regular instead of mid or premium. Our Sy still pings under heavy acceleration:2cents:
 
Loeryder

Loeryder

New member
Re: What does knock sound like?

Marbles in a coffee can, and by the time your hear it it is way too late.
 
fiveoh

fiveoh

Enforcing traffic laws
Re: What does knock sound like?

I'd also say marbles bouncing around! but let it go for a while and it will sound like $3,000 being flushed down the toilet. and 3k is being conservative! trust me it happened to me!
 
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