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Gmt-900 Ticking On Start Up?

ILL

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ILL Enthusiast

ILL

Posted
Posted

I've seen a few posts about the previous gens having issues with ticking/knocking on start up, but nothing about the NBS.

 

Anyway, my GMT-900 Vmax Crew Cab has been ticking on start up. It only lasts a few seconds and stops when the oil pressure builds. Also, it only seems to happen on cold startup after the truck has been sitting for a few hours. Does anyone else's Vmax do this?

 

I was surprised to hear my truck ticking during startup because at my work we use 2500 HD's with the 6.0L and none of them do this. Also, this only started happening. During the first 3 months of ownership, this never occurred.

 

Thanks,

I L L.

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

Ian, I have been driving Caravans for work vehicles for several years. The past 2 had 3.3L V 6 s in them and on occasion they will tick at start up for apprx 5 seconds. I typically see this happen after the oil has been in for 3K to 4K and ready to be changed. However, they will sometimes do this randomly even when the oil is fresh.

 

If I hear this, I can replace a qt of oil at my next change with a qt of Rislone and the tick will be gone for at least the next 2 to 3 oil changes. It is a great product and is typlically good for the hyd lifters in a engine but usually you see it work best on higher mileage engines which is not the case with yours.

 

You can try it. It is not very expensive and it certainly will not hurt anything. It has been around forever and there are "no side effects".

tinie0416 Enthusiast

tinie0416

Posted
Posted

I have the v-maxx 6.0L also in my 2007 GMC sierra, and it ticks upon start up for a few seconds. It is not the old "piston slap" thing that happened in the older engines, but I do wonder why GM can't build an engine that don't make noises upon start up. But the good thing is, this engine has a 100,000 mile warranty and its in their hands if it breaks. I would not worry to much about it, and I dont think it hurts the engine at all. I have some buddys who have this same issue with their 6.0 engines and some of them say to use synthetic oil to help with the ticking. I have only 3,800 miles on mine and have not changed the oil yet, so I dont know if it really helps or not.

Gozer Enthusiast

Gozer

Posted
Posted
I have the v-maxx 6.0L also in my 2007 GMC sierra, and it ticks upon start up for a few seconds. It is not the old "piston slap" thing that happened in the older engines, but I do wonder why GM can't build an engine that don't make noises upon start up. But the good thing is, this engine has a 100,000 mile warranty and its in their hands if it breaks. I would not worry to much about it, and I dont think it hurts the engine at all. I have some buddys who have this same issue with their 6.0 engines and some of them say to use synthetic oil to help with the ticking. I have only 3,800 miles on mine and have not changed the oil yet, so I dont know if it really helps or not.

 

I have 7 months and 6000 miles on my Vmax 6.0L, and it "ticks" on start-up even running Mobil1 synthetic. This is a cold weather issue, as it rarely did it during summer.

sno Enthusiast

sno

Posted
Posted

Both my vehicles have a cold-start "tick" that goes away after a little while.

 

Running Mobil 1 in the 'burb and it's not as bad as my truck which is running whatever the dealership poured in with their "free" oil change. Next oil change and the truck will be running Mobil 1 too.

xccelagator Enthusiast

xccelagator

Posted
Posted

Our 08 Crew cab with a 5.3 has been doing that brand new tooThe temps have around 10-30 degrees and does it on a cold engine. It first sounding like a sticky lifter, but sounds like a minor heat shield vibration more than anything. I only have 230ish miles on it too. My Nissan Xterra is notoruious for tapping upon start-up, but goes away in 3-5 seconds. I would almost bet it is a body vibration issue.

 

Rislone is good stuff. I tend to use it every 10,000 miles on my Xterra, because I run dino oil (long story). Rislone works where you have any build up of vanish.

 

Dan

LAGA Enthusiast

LAGA

Posted
Posted

VMAX 1500 2WD with 6500 miles and no ticks. Purrs like a kitten at idle. I am using German Castrol 0W-30 and Lucas UCL in the gas Are you guys hearing the injectors?

tobias Senior Enthusiast

tobias

Posted
Posted
VMAX 1500 2WD with 6500 miles and no ticks. Purrs like a kitten at idle. I am using German Castrol 0W-30 and Lucas UCL in the gas Are you guys hearing the injectors?

 

Nope. It's only for maybe 2 or 3 seconds and only on cooler mornings. It has happened to me when it was only 40 over night. I might try some additive sometime but it's not really a huge concern with the new warranty. It's a GM, why should the rattles and noises only be inside the cab?

 

Daddy

sno Enthusiast

sno

Posted
Posted
It's a GM, why should the rattles and noises only be inside the cab?

That right there is funny... in a "sad but true" sort of way. :crackup:

bbb Enthusiast

bbb

Posted
Posted

This noise is different from the 06 and down engines...it is apparently in the valve train and has something to do with the AFM system and the lifters.

Mine is a 5.3 and does it when its warm or cold on initial startups but with no regularty. Mine is on the passenger side of the engine.

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