Hmmm...WOT rattle near 7K rpms.......
08-22-2009, 09:09 PM
#1
Hmmm...WOT rattle near 7K rpms.......
Hey guys...I rarely get to get on the gas with my car...plus..i just don't drive crazy. That said, There is a long off ramp that is flat and straight and secluded from other cars etc. I paddle downshifted to 2nd gear at about 4K rpms (30mph?) and went WOT. The pull is NICE. No complaints...but as I neared 7K I SWEAR I heared a metalic type rattling noise. I could be nothing...it could be normal. Any ideas?
08-22-2009, 10:39 PM
#2
Registered User
Join Date: Aug 2009
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
A metallic rattling at high RPM? If I didn't know better, I'd say engine detonation. Are you running premium or low-grade gas?
If it is detonation, or even if it just could be, get it checked out pronto. You don't want to risk that at all.
BW
If it is detonation, or even if it just could be, get it checked out pronto. You don't want to risk that at all.
BW
08-23-2009, 10:32 AM
#4
Registered User
Join Date: Aug 2009
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Well, you're treating it right, then. I still smell detonation, though. Seriously, take that in. Seen too many accounts (and personally a couple) of engines blown from that very thing.
Let us know what you find, please. If your car is stock, and is suffering from that, then we could all have a problem.
BW
Let us know what you find, please. If your car is stock, and is suffering from that, then we could all have a problem.
BW
08-23-2009, 07:48 PM
#6
Dunno about bad gas? I might try it again tonight. Might be kind of hard to complain to the dealer that while aproaching 7K rpms i hear something funny. I'll report back later if I go out.
Trending Topics
08-24-2009, 12:32 AM
#10
Tried it again tonight...had the window open..went WOT in 2nd from 3K to ~7400rpms....sounded great.
Maybe my keys rattled last friday?
Not worried. BTW: WOW...the VQ37 is no joke!
Maybe my keys rattled last friday?
Not worried. BTW: WOW...the VQ37 is no joke!
08-24-2009, 01:36 AM
#11
Registered User
Join Date: Aug 2009
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Ain't that the truth. I'm not sure if I'll ever completely get over being surprised by just how hard this engine pulls. I'm used to big, torquey V8's, but damn! They definitely got this one right!
BW
BW
08-24-2009, 08:54 PM
#12
Registered User
Join Date: Aug 2009
Posts: 154
Likes: 0
Received 0 Likes
on
0 Posts
True, I put all these mods into making my Miata fast and my stock G37 SMOKES it.............
08-25-2009, 09:49 AM
#13
Registered User
Join Date: Jul 2009
Location: Chicago Suburbs
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
It is a wonderful motor, but the NVH after 6000 rpms is pretty high. Maybe it's worse on the 6MT. I also notice a strange noise after pushing the clutch pedal down during high rpm shifts. This motor is butter smooth around town and turns into a beast during aggressive driving. It's a little rough, but nothing I can't live with. It just surprised me based on how smooth it is in low rpms.
08-25-2009, 10:34 AM
#14
Registered Member
iTrader: (1)
Join Date: Mar 2008
Location: Bristol, CT
Posts: 117
Likes: 0
Received 0 Likes
on
0 Posts
This may sound crazy but my friend had a very similar problem. He thought there was something loose in his dash because it would rattle at high rpms...usually anything after 5000K. He took me for a ride and I heard it...really thought he had something loose in his dash. We went back to my house to do an oil change and come to find out...he only had 3 qts of oil in his car! Did an oil change and the noise went away. He learned his lesson to check his oil level lol. So check your oil too. Could be something crazy like that.