therealjharris: Sounds like a faulty chain tensioner. As far as oil goes, I'm pretty sure
that oil pressure actuates the tensioner. Perhaps the tensioner wasn't
sticking out all the way?
Trent Taylor: It's weird but, this problem went away when I changed the oil. Must have
1dirosa1: thats not the timming chain!!!!! was it confirmed, freak thats sounds
Chikonmon: duuuurrppp. derp da durp da duuurr!
Deepak Koppula: Same problem with 07 Mazda 3, 2.3L AT. I spent over $1,500 to get things
fixed, changed all sorts of parts in the engine and the noise actually got
worse. It sounds like a diesel engine now and noticed that AC use makes the
noise worse, it sounds less awful when i move the shift lever to N while at
a stop light. I have driven 1,000 miles since and worry that i would be
stranded with a dead engine sometime soon. Any comments or thoughts
pinoyeh: Chain tensioner needs to be replaced. Usually, the noise starts when during
the 1st engine start up, once oil starts to circurlate, the noise goes away
slightly. It will be an expensive job as the parts to be replaced will be
the chain, chain guides, chain tensioner and all sprockets.
David Knetsch: We've got the same problem on my wife's '05. Our mechanic said it is a well
known problem that Mazda is aware of, forgot the part he said was
defective. I found this as I was searching to see if it's covered under an
Huzee66: WARNING: With Mazda and Variable Valve Timing (VVT engines) , DO NOT EVER
let oil get low -or- let it go without regular oil changes. Great engines
but low oil, or oil not changed frequently will KILL THEM. Happened to me.
You've been warned.
Kamper Art: high chance your tensioner is weak.
burnz2510: Make sure you get that fixed/sell it. I just sold my suzuki that had a
problem like that, it only gets worse over time. And if it snaps, goodbye
pinoyeh: Holly mother trucker........
RoadRacerGT: Great point and now with Kevlar available...belts appear to be a safer bet.
Nicholas Lefebvre: or replace it takes like 2-3 hours