GM Truck Club Forum banner

1 - 20 of 21 Posts

·
Registered
Joined
·
8 Posts
Discussion Starter #1 (Edited)
New 08' 1500 extended cab with 6.0L vortec and max trailering package.. On startup I hear rattling (sounds like lifters) for about 2 or 3 sec before the sound goes away.. I realize this may be lack of oil to the valve train and some rattling can be expected until it gets oil pressure but I'm wondering if this is "normal" for this engine? or do I have a problem... Oh, the vehicle has 2,400mi. and was broken in properly, etc. etc.
 

·
Registered
Joined
·
561 Posts
i would say no---not normal. what grade of oil? where are you at? how many miles? did it do this from the 1st day or new?......need details to assist...mike
 

·
Registered
Joined
·
1,667 Posts
Are you somewhere where it has been bitterly cold lately,and is it worse on bitterly cold mornings.
I noticed on colder days this winter(Maybe 40 degrees-it doesn't get cold in New Orleans) my Suburban(1998 198000 miles) has what I assume is the lifters rattling/ticking for about 20 seconds at first startup in the morning.I've only owned it 7 months-3000 miles-and I haven't had a hydraulic lifter vehicle since 1986(1980 Dodge D-100 318 ),so I'm a bit out of touch lifter wise.
I'm pretty sure that a new vehicle like yours shouldn't rattle/tick like my ancient hig mile truck.The little valve in the lifters shouldn't let the oil leak out overnight in a very low mile truck.
Like Collins-said, it doesn't sound normal-not for a new truck.
I wonder-does it have some sort of fancy cylinder shut down feature that might mean it has some sort of complicated way of intentionally draining or not filling those lifters?I would check out GMs site-see if they have some sort of FAQ section.Try to see if GM describes this as normal for your motor because oif some sort of valve train trickery.
Heck, if this is "normal" they should say it is in the manual.
One other possibility-call the dealer service department.See if you can get someone to give you good info-as opposed to party line BS-on why it is normal-if they say it is normal.
Like Collins says-it doesn't sound normal unless some valve train gimmick is at work.I would want a really convincing explanation-something more than,"it is cold,they all do that."
Luck,
Charlie
 

·
Registered
Joined
·
67 Posts
If it has been cold out typically under 45 degrees you will get a tap noise from your truck. All 5.3 and 6.0 do it at some point.

with 4.8L, 5.3L or 6.0L Engine (VINs V, T, Z, U -- RPOs LR4, LM7, L59, LQ4)

This bulletin is being revised to add an additional engine to the models section. Please discard Corporate Bulletin Number 01-06-01-028 (Section 06-Engine).

Some of the above vehicles may exhibit an engine knock noise that begins in the first 19,000-24,000 km (12,000-15,000 mi) of use. The knock noise is most often noticed during initial start-up and typically disappears within the first 5-30 seconds (may last longer in extreme cold temperatures). The noise is usually more noticeable on the initial start-up when the temperature is below 10°C (50°F) and may be more pronounced on the first cold start following a long trip.

This noise may be caused by an interaction between carbon that has formed on the piston, the piston motion and the cylinder wall. GM Powertrain Engineering, and an analysis of engines with this condition, has confirmed that the noise is not detrimental to the performance, reliability or durability of the engine. THIS NOISE DOES NOT HAVE ANY EFFECT ON THE LONGEVITY OF ANY OF THE ENGINE COMPONENTS.

Using some GM top engine clean will help but only covers it up for awhile. GM isn't pleased with this because they get calls from techs and customers all the time. I have however torn a 6.0 apart that had this condition and didn't find any damage to the cylinders valves lifters or springs. That is not to say it should go unchecked. Hope this Helps.
 

·
Registered
Joined
·
8 Posts
Discussion Starter #6
The truck is 2 mo. old and has 2,500mi. on it.. .5-30 wt. oil and that was changed w/ filter after the first 1,500 mi... I've only noticed it on cold mornings, below 32 degrees F.... It's the 6.0 liter vortec Max.... It lasts about 5 sec. tops but it's just annoying on a brand new expensive truck to hear this what sounds to me like oil starved valve train on start up
 

·
Registered
Joined
·
1 Posts
My 2007 VMax has the same ticking problem on start-up. It's usually after it's sits for more than 12 hours, and usually in colder temps, although it has happened around 60 F. I'm using Mobil 1 5W-30 with a Mobil 1 filter. I originally thought a bad anti drain back valve on the filter could be the problem, but switching to Delco and Wix filters didn't change a thing.
Phoebeisis brings up a good point regarding the cylinder deactivation feature, I'm pretty sure the cylinders are deactivated by cutting oil flow to the lifters, but wouldn't that cause the ticking noise to come back whenever the engine goes to 4 cylinder mode?
 

·
Registered
Joined
·
561 Posts
as we (they) make the tollerences tighter and use less thich oils it going to do this and the sounds you hear is your motor getting damage. your options are to install an oil occumalator or a preluber or just let it be. i used a few products like dura lube and motorup and slick 50 and that helped put my mine at ease some but a good pre-luber is the best and easy to install.....mike
 

·
Registered
Joined
·
17 Posts
Tap

My 01 suburban has started this same problem. Only with severe cold and seems to be a single lifter. It stops but still is annoying. If engine is warm no problem. Even on warm 40 degree or more days no problem. I am trying oil change with slightly thinner oil tomorrow and see what happens. good luck
 

·
Registered
Joined
·
17 Posts
Tap

Changed my oil and reset the oil reminderyesterday . Temp outside today at 9 am was 11 degrees. at start-up no tap. Keepin my fingers crossed. Good luck on your issue.
 

·
Registered
Joined
·
3 Posts
no oil pressure on startups

I have a similar problem as mentioned above...I have a 1999 Silverado. MY problem goes to the point that I have no oil pressure for 15-30 seconds on cold startups. Oil is 5W30 Castrol(conventional)..It is changed in conjunction with the "Oil life monitor" Any ideas??
 

·
Registered
Joined
·
1,750 Posts
mine does too, but i dont have a problem with my pressure taking time to come up. the ticking goes away after a few seconds, usually takes a little longer on colder days.
 

·
Registered
Joined
·
3 Posts
Changed my oil and reset the oil reminderyesterday . Temp outside today at 9 am was 11 degrees. at start-up no tap. Keepin my fingers crossed. Good luck on your issue.
What weight and type of oil did you change to....The rattle/ticking is getting rather bad....thanks
 

·
Registered
Joined
·
63 Posts
Doesnt sound normal for a truck with the mileage quoted. I have heard some 5.3 with a noise on start up but it did not sound like lifters and they were closer to 100K . Double check that you used 5w 30 and that it was quality oil
 

·
Registered
Joined
·
46 Posts
New 08' 1500 extended cab with 6.0L vortec and max trailering package.. On startup I hear rattling (sounds like lifters) for about 2 or 3 sec before the sound goes away.. I realize this may be lack of oil to the valve train and some rattling can be expected until it gets oil pressure but I'm wondering if this is "normal" for this engine? or do I have a problem... Oh, the vehicle has 2,400mi. and was broken in properly, etc. etc.
Don't mean to high jack your thread but I was wondering what your fuel consumption is. I am negotiating for a similar truck and am curios.
 

·
Registered
Joined
·
2 Posts
tic

I have 2007 v-max 6.04x4ltz excab.,I have 6300 miles,same problem but worse,Stepped on gas and thought rod bs were going to go through block,Took it to service at dealer told could not reproduce problem told if anything happens to engine they will replace with out charge,Now the tic you are talking about told it is normal,Thats from dealer service mine does it when ever i start it up after it gets warm it stops.After setting over night it does the same thing.I have alot of problems with this trucknot sure if yours is 4x4 LTZ but what i payed for mine I could have bought a nice sports car ,Will never buy another chevy truck,And I was dumb enough to buy exwarnt.:grrrrrr:good luck, if you get a fix for yours please let me lnow,
 

·
Registered
Joined
·
11 Posts
tap

My 08 5.3 does this. Just so happened to have the radio and heater fan off and standing outside when I reached in to start my truck. I now try to listen for it on start ups. I have about 5300 miles on it.
 

·
Registered
Joined
·
8 Posts
Discussion Starter #19
12,000mi. on my 6.0 now and still makes the cold rattle.. It hasn't got any worse.. Dealer has a bulletin on the wall saying this noise is "normal" in all 5.3 and 6.0 engines... I have the correct filter and I installed it myself correctly.. Oil is mobil 1 5-30 and it's always changed before it needs to be.. Check engine light came on last week. Fuel vent solenoid wiring was chaffing against emergency brake cable, no biggie, 45mi. to fix at dealer.. Averaging over 18mpg not towing and this is with the 4.10 axles, can't complain.. I get 15.5 mpg towing a snowmobile trailer w/ two sleds in it and 11.0mpg towing a 25' pocket cruiser with an all up weight of around 8,500lbs... Very happy w/ the truck except for the cold engine rattle at startup.. I don't care how many bulletins GM puts out, this shouldn't be happening.
 

·
Registered
Joined
·
2,201 Posts
I got the same noise on my 8.1L. It is barely noticeable but if it gets worse I'll just rebuild it. It will give me the excuse to justify new performance internals.
 
1 - 20 of 21 Posts
Top