Start up Lifter/Valve noise gone, since............... - Pontiac G8 Forum: G8 Forums - G8Board.com
 
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post #1 of 8 (permalink) Old 01-10-2017, 12:22 AM Thread Starter
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Start up Lifter/Valve noise gone, since...............

Gone since I rev engine to 2K - 2.5 K before shutting off immediately upon idle. ( end of night after final drive) Also, I dont start car WITHOUT foot on brake in the mornings. I noticed exhaust note is more quite than when I dont have brake pressed. I am speaking mainly after car is sitting over night. Maybe its just coincidence ??? I also turn key and let fluid prime before initial start up in mornings. So far so good.
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post #2 of 8 (permalink) Old 01-10-2017, 09:11 AM
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If it has a decent amount of miles on it, simple wear is going to cause noises like that. It could be indicative of a future problem, or it could lead to nothing.

What is really telling is when you see and feel the RPMs intermittently tank by a few hundred on the dial and it seems to hesitate at highway speeds. I say highway speeds because it is generally easiest to notice with consistent speed and conditions. Much harder to pay attention to on city roads with all of the ups and downs. While not limited to lifter issues, it can be a symptom of a future failure.

If you don't feel that, you're likely not going to have an issue in the near future. It may simply be that the lifters needed oiling after sitting for a while. It doesn't take that long for the oil to fully drain out of the engine. Its hot for a considerable amount of time after driving.

Still, wear and tear will lead to issues down the road, so monitor it as you have been. It wouldn't hurt to put a scanner on their for event logs. If you don't have one, you can get a Bluetooth or Wi-Fi one for 80 bucks or so for such things.

'09 G8 GT - Mods Planned: Stage 1C Livernois, Fender Well CAI, Kooks Mids, Solo Axle back (Already have the X Pipe), GXP Trans Cooler, 2800 Circle-D Stall Converter, Differential (Max 3.45), Suspension mods (Bushings, sway bars, etc)

Driving isn't for everybody. Some people are just plain bad at it.
I guess that means I have to go back to driver school.......
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post #3 of 8 (permalink) Old 01-10-2017, 08:42 PM
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before I did the dod delete I would get the lifter noise for a split second then it was smooth and quiet, with the ls3 cam and the ls7 lifters its quite from the start,, but it has less than a 100 miles on it so that might change with mileage ,, I am at 55000, and I am not easy on it by any means gmonde

kook 1 7/8 long tubes, ls3 cam,dod delete,tuning school transmission tune,cai,corsa exhaust,lowered 1",staggered wheel set 19x8.5 19x9.5 breyton gts av
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post #4 of 8 (permalink) Old 01-10-2017, 08:52 PM
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Originally Posted by gmonde View Post
before I did the dod delete I would get the lifter noise for a split second then it was smooth and quiet, with the ls3 cam and the ls7 lifters its quite from the start,, but it has less than a 100 miles on it so that might change with mileage ,, I am at 55000, and I am not easy on it by any means gmonde
If you do the preload correctly with the right pushrods it should operate quietly (quiet relative to normal valve train operation). If it is overly noisy, that indicates a problem with the installation. So your engine should remain quiet..... until such a time as the parts wear enough. I'd posit that should take some time.......

'09 G8 GT - Mods Planned: Stage 1C Livernois, Fender Well CAI, Kooks Mids, Solo Axle back (Already have the X Pipe), GXP Trans Cooler, 2800 Circle-D Stall Converter, Differential (Max 3.45), Suspension mods (Bushings, sway bars, etc)

Driving isn't for everybody. Some people are just plain bad at it.
I guess that means I have to go back to driver school.......
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post #5 of 8 (permalink) Old 01-10-2017, 09:20 PM Thread Starter
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I want to do the entire kit Lifters valves, cam, .. But so much money. Its like adding onto the price of what I paid for the car.. I have a hard time stomaching that. I dont have tools or patience to do it myself.
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post #6 of 8 (permalink) Old 01-11-2017, 09:32 AM
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Originally Posted by IcudahadaG8 View Post
I want to do the entire kit Lifters valves, cam, .. But so much money. Its like adding onto the price of what I paid for the car.. I have a hard time stomaching that. I dont have tools or patience to do it myself.
For me, it's my builder car now.

Since I am not buying a new car, and my wife just got hers... this is essentially my new car. I'd not be doing it if I couldn't save the money, because debt isn't something I'd want to do on an 8 year old car..... Depends on preferences, but I'm not comfortable with it...

So yeah.... it's a lot to stomach. At least some of the cost is justified due to normal maintenance cycles, but not all.

Plus, I love working on this kind of stuff.... Heck, any mechanical projects.... I even built a low temperature Water Chiller... LOL

'09 G8 GT - Mods Planned: Stage 1C Livernois, Fender Well CAI, Kooks Mids, Solo Axle back (Already have the X Pipe), GXP Trans Cooler, 2800 Circle-D Stall Converter, Differential (Max 3.45), Suspension mods (Bushings, sway bars, etc)

Driving isn't for everybody. Some people are just plain bad at it.
I guess that means I have to go back to driver school.......
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post #7 of 8 (permalink) Old 01-12-2017, 08:15 PM
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Hard to tell the difference between lifter tick and piston slap at initial startup... My old LS1 (f-body) had was was probably piston slap for a few seconds after every startup, for 11 years and over 130,000 miles. My G8's lifter failure sounded a bit like that, but not just at initial startup like my old LS1 did.

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post #8 of 8 (permalink) Old 01-12-2017, 08:49 PM Thread Starter
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The noise I used to get was like a muffled machine gun. Strong for 2 seconds, fading to nothing over the next 3 seconds.

My 2009 - With the usual suspects.
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