G35 Clanking / Grinding start up noise (solved)

This is the noise my 2005 G35 coupe makes upon startup. It has been happening since 42k miles and I have brought it to the dealership asking for it to be fixed, but they have not successfully done it yet. Since my warranty is just about to run out (69,581 miles out of 70k) I need to figure out what it is so I can press Infiniti to fix the vehicle correctly this time.

What is this noise!?!

Category:

Autos & Vehicles

Tags:

• G35 Coupe
• Startup Noise
• Start up
• noise
• grinding
• engine
• VQ35DE
• G35
• Skyline

[mobbindag]

Also make sure you have enough oil in your engine. Infiniti states you need 5 quarts in the VQ engine, yet I always seem to need to fill up 5.25 quarts for it to be fully filled. If I don't, say hello to the startup noise.

[mobbindag]

Just so everyone knows, this problem has been solved and my engine was replaced under warranty.

It seems that I had an engine bearing that had failed and sent metal shavings all throughout my engine, scratching and pitting my camshaft. They believe this is due to low oil likely caused by the classic VQ35DE oil consumption issue. More info can be found on the original G35driver thread.

[dmemenza]

@mobbindag

Did you always have this rattling noise at startup? Or every once in a while, you noticed this rattling. I've had at time, the same kind. But its not very consistent. It would happen every once in a while. I notice at times too, that there is a sweet smell after I start my car. I also worry about the oil consumption problem. The only thing is that the damn oil stick is so difficult to get a good reading from. I've also heard about oil pooling in the spark plug pocket.

[mobbindag]

It wasn't consistant, only sometimes but it grew more and more common as the problem got worse. Visit the g35driver *dot com* forums and search for the thread " *SOLVED* Engine Startup Clanking Noise, 2005 G35 Coupe. (With Video) " which will be in the "Engine, Drivetrain & Forced-Induction" subfoums.

You will find much more info there to help you.

[7477238]

Your timing chain tensioner is bad, the VQ35 engines are known for that sort of problem. Should be covered under your warranty.

[mobbindag]

Yeah, that is possible, thanks for your input. I have had people suggest these problems so far:

1. Starter not disengaging quick enough from engine when starting.

2. De-pressurized (and therefore temporary stuck) cam lifter.

3. Timing chain failure of some sort.

[TruAgape123]

It's ur timing chain tensioner. The Infiniti techs know this, they're just waiting for your warranty to run out so that they won't have to fit the bill. Every since the Renault partnership, Nissan/ Infiniti' reliability has declined.

[Aimenatu1]

i have the same problem with my 05' g35 it pisses me off everytime it happens. i took it to infiniti and left it there they called me next day and said come get your car nothing wrong with it. what should i tell them is wrong with it.?

[oyousef11]

this is a problem with the 05s...my 350z did it and only on cold starts...dont know what caused the problem, i totalled the car ended up buying a 04 g35 coupe :P

[chris000089]

sooo what was the resolution?

[letmeregisterforeal]

@Djeeeman make sure the engine has oil in it! 

[Djeeeman]

So is this normal or not? I have an 03 and on cold start ups this happens. But the rest of the day the car does not make that noise again. Please let me know

[orsa416]

It also makes tha sound on my 05 g35 sedan....its been doing it since 60,000 miles

[dineth]

Hey man did a video respond with the noise my car makes. let me know if you have any idea what it might be.

[dukviper90]

My car does this at start up all so, g35 coupe. I honestly think it's just the variable valve timing actuating. Pathfinder with VQ35DE did the same thing every now and then also. I'm not worried about it at all since it drives fine and silky smooth so I'm going to deem it as normal. When it blows, give me an excuse for Cp pistons and eagle rods and studs. :)