I would like to do a write up about timing chain problems on VQ35DE engines.
Mainly there are three problems:
1: Broken timing chain guide
2: Worn secondary timing chain tensioners
3: Sticky main timing chain tensioner
I've done a lot of searching on the forums about timing chain problems on VQ35DE. My car's problem was a rattle during start up. It would rattle everytime I start the engine after it was sitting for about 1 hour or so. Sometimes it would rattle sometimes not. Finally I openned the cap where the main timing chain tensioner and I saw that main timing chain guide broke.
Usually it brakes from the top and slides down. Therefore the main tensioner fully extends. Please look at the pictures down, so I can fully explain myself
I took her to my local mechanic here in brooklyn where I got a quote of $500 for the labor to fix this problem I would like to post pictures, so you guys can see where to look in case you have such problems.
Broken Timing Chain Guide
On this picture I circled where the tensioner is pushing against the guide and ruins himself and the guide.
On this picture you can see how the tensioner is fully engaged, but it does not help to create tension on the chain.
On this picture I tried to pull that plastic on the guide that slided down, because the top clip broke off and you can see where the tensioner suppose to push.
Today I got a call from mechanic. I went there to see whats going on. i took the pictures.
Please note that it was done without removing the engine from the car.
Not my picture though
Video how it sounds like (NOT MINE)
Another problem is worn secondary tensioners
Here is the picture I got it from maxima.org
When it happens you will hear a constant whine comming from your engine bay.
Video (Again not mine)
I think I included everything.
If I was somewhere wrong, you are more then welcome to correct me
Hope it helps to solve your questions guys.