2010 G37- Cold Engine Start up Noise
#31
2010 G37x - Purchased new on August 31, 2010 - valvetrain clatter
Joined this forum because of valvetrain noise on a cold start. Happy to see I'm not the only one, but it still is of concern to me even though it seems to be "normal" for most G37 engines.
My concern is that the heads are not getting proper lubrication at start-up, which means trouble down the road--probably soon after the warranty expires. If this is a common problem with 3.7 engines, I don't expect that Infinity will admit to it...that would cost them a bundle.
If anyone has a TSB on this problem, I would like to see it. Thanks in advance.
My concern is that the heads are not getting proper lubrication at start-up, which means trouble down the road--probably soon after the warranty expires. If this is a common problem with 3.7 engines, I don't expect that Infinity will admit to it...that would cost them a bundle.
If anyone has a TSB on this problem, I would like to see it. Thanks in advance.
Last edited by Marina Blue; 11-04-2010 at 11:51 PM.
#32
Registered User
Joined this forum because of valvetrain noise on a cold start. Happy to see I'm not the only one, but it still is of concern to me even though it seems to be "normal" for most G37 engines.
My concern is that the heads are not getting proper lubrication at start-up, which means trouble down the road--probably soon after the warranty expires. If this is a common problem with 3.7 engines, I don't expect that Infinity will admit to it...that would cost them a bundle.
If anyone has a TSB on this problem, I would like to see it. Thanks in advance.
My concern is that the heads are not getting proper lubrication at start-up, which means trouble down the road--probably soon after the warranty expires. If this is a common problem with 3.7 engines, I don't expect that Infinity will admit to it...that would cost them a bundle.
If anyone has a TSB on this problem, I would like to see it. Thanks in advance.
#33
Registered User
iTrader: (1)
Join Date: Jun 2010
Location: Calgary, Alberta
Posts: 281
Likes: 0
Received 0 Likes
on
0 Posts
It's normal... it's because of the VVEL "knocking" sound in the G37 VQ 3.7 engine. The engine just needs some warm lube before the knocking sound is gone.
If it really bothers you, you can opt for the super expensive Nissan ester oil which causes some of the oil to stick to the engine and eliminate the knocking, rough sound during a cold start up. Well, at least it's suppose too.
If it really bothers you, you can opt for the super expensive Nissan ester oil which causes some of the oil to stick to the engine and eliminate the knocking, rough sound during a cold start up. Well, at least it's suppose too.
#36
Registered User
Join Date: Nov 2009
Location: Long Island,N.Y.
Posts: 99
Likes: 0
Received 0 Likes
on
0 Posts
J
#37
Appreciate the replies after my post. Have to get my wife to let the engine run for a half-minute before driving away.
Don't want to go the ester oil route. I just hope engine longevity is not compromised.
devil2k, you need a solid-lifter 427. I love that sound too, but only when it's supposed to be there.
Don't want to go the ester oil route. I just hope engine longevity is not compromised.
devil2k, you need a solid-lifter 427. I love that sound too, but only when it's supposed to be there.
#38
#39
Mine does the same thing. Now on the other hand, my freind's Bmw 550I is louder at cold startup. I thought something was wrong with his car, until I went to test drive few preowned 550I's, they all did the same thing. I ended up going with the G, so when I heard my G making similar noise during cold startup, I just assumed that its normal on all the newer cars.
#40
Registered User
Sup guys! Just bought my 2013 Infiniti G37S Sedan, last week. I noticed that rough cold start today as well. Glad to see that this sound is "normal". I may look into this Esther Oil thing from Nissan/Infiniti.
#42
Registered User
Join Date: Nov 2009
Location: Long Island,N.Y.
Posts: 99
Likes: 0
Received 0 Likes
on
0 Posts
Joined this forum because of valvetrain noise on a cold start. Happy to see I'm not the only one, but it still is of concern to me even though it seems to be "normal" for most G37 engines.
My concern is that the heads are not getting proper lubrication at start-up, which means trouble down the road--probably soon after the warranty expires. If this is a common problem with 3.7 engines, I don't expect that Infinity will admit to it...that would cost them a bundle.
If anyone has a TSB on this problem, I would like to see it. Thanks in advance.
My concern is that the heads are not getting proper lubrication at start-up, which means trouble down the road--probably soon after the warranty expires. If this is a common problem with 3.7 engines, I don't expect that Infinity will admit to it...that would cost them a bundle.
If anyone has a TSB on this problem, I would like to see it. Thanks in advance.
#43
Like others, I was concerned with the lumpy idle, but 2 things put me at ease: 1) the sound always smooths out at exactly the same time, and 2) if you put the car in gear right away, the noise immediately disappears and the car sounds normal. Whatever it is, the computer is controlling it. If it was an oil related issue, I would think the noise would increase when put in D or R.
#44
This is normal. I've had five different service loaners and they all do this. For the first ~40 seconds it chugs away like an old motorboat. IMO something very specific and intentional is going on with the firing order, or timing, or valve lift, or a combination of some, all, none or other things. It has nothing to do with oil or engine temp. Probably done for emissions and/or warming up.
#45
Registered User