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Old 12-11-2017, 09:11 AM   #15
sykb47l

 
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They pulled the heads and put it back together?
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Old 12-11-2017, 09:14 AM   #16
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They pulled the heads and put it back together?
Not %100 sure I just asked if anything else was damaged they claim no but idk if I can definitely trust it, just based off of horror stories from other people. I just want to take the proper precautions. I haven't gotten the car back yet as this happened over the weekend
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Old 12-11-2017, 09:21 AM   #17
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On a cylinder with a broken lifter id sure think the pushrod would be suspect as well.
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Old 12-11-2017, 09:27 AM   #18
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On a cylinder with a broken lifter id sure think the pushrod would be suspect as well.
Agreed, but to my knowledge it's just the lifter for now. Pretty frustrating
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Old 12-11-2017, 09:51 AM   #19
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On a cylinder with a broken lifter id sure think the pushrod would be suspect as well.
This. Have them pull both heads. I would be tempted to replace all the lifters and inspect each and every pushrod.
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Old 12-11-2017, 10:28 AM   #20
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I think its suspect that they pulled the heads, put it back together without fixing it and you can just go and drive it away from the shop.

That in itself is the entire labor amount for the repair.
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Old 12-11-2017, 10:32 AM   #21
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I think its suspect that they pulled the heads, put it back together without fixing it and you can just go and drive it away from the shop.

That in itself is the entire labor amount for the repair.
What? Who said they weren't fixing the broken lifter on #3? And it isn't repaired yet to my knowledge I have to call later tlday
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Old 12-11-2017, 12:51 PM   #22
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Update: waiting on a part from GM the fuel line since they had to remove it and it isn't reuseable supposedly. However that part is on backorder also supposedly....anyways I asked if there was any valve damage he said they didn't take off the head just used a camera to inspect it and didn't see anything out of the ordinary, he also said if I smacked a valve I would've known right away. So as of right now just lifter and fuel line.
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Old 12-11-2017, 10:13 PM   #23
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So I looked on the OEM specs and have no idea what part they are talking about...ugh I just want my car back!
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Old 12-12-2017, 10:07 AM   #24
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I was under the impression that valve springs can be weakened significantly from an overrev. I would replace those as well as lifters and push rods.
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Old 12-12-2017, 10:50 AM   #25
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I was under the impression that valve springs can be weakened significantly from an overrev. I would replace those as well as lifters and push rods.
You think so? Even if no damage was done to the springs physically? This is so frustrating and annoying. Is lifter, push rods and spring replacement difficult?

Edit: Just ordered a valve spring pressure tester, playing no games here.

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Old 12-12-2017, 11:38 AM   #26
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Update: waiting on a part from GM the fuel line since they had to remove it and it isn't reuseable supposedly. However that part is on backorder also supposedly....anyways I asked if there was any valve damage he said they didn't take off the head just used a camera to inspect it and didn't see anything out of the ordinary, he also said if I smacked a valve I would've known right away. So as of right now just lifter and fuel line.
Don't they have to take off the head to replace the lifter? And did they 'camera inspect' all the lifters?

Hmmm... maybe it's just me but I am very suspect whether they really did enough of a diagnosis. If you damaged one lifter, you may have at the least weakened other components of the valve train.

It's your car of course but if it were my car, I would ask for them to pull both heads, inspect the valves and all the lifters and push rods as well as the rockers and valve springs. Better safe than sorry because if anything was weakened, it will cost you a bunch more down the road.

Good luck.
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Old 12-12-2017, 11:53 AM   #27
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Don't they have to take off the head to replace the lifter? And did they 'camera inspect' all the lifters?

Hmmm... maybe it's just me but I am very suspect whether they really did enough of a diagnosis. If you damaged one lifter, you may have at the least weakened other components of the valve train.

It's your car of course but if it were my car, I would ask for them to pull both heads, inspect the valves and all the lifters and push rods as well as the rockers and valve springs. Better safe than sorry because if anything was weakened, it will cost you a bunch more down the road.

Good luck.
I'm not sure if they need to take of the head or not to replace the lifters from the way he made it sound I don't think so, I also saw some videos on YouTube of someone using a magnet to retrieve them but idk if it's the same w/ this type of engine. I think he just meant he used the camera to inspect the valves in the cylinder. And yeah once I get it back I plan on doing some of my own kind of diagnostics just for peace of mind if something is out of the ordinary I'll just send it out to a machine shop to replace the entire valve train. Like I said before it ran pretty well other than the misfire that I didn't notice right away, it started up right away and still had that power. The misfire code didn't occur until after I got home. I also drove it to the mechanic and it felt for the most part normal like I said just little bit extra vibration and a rattley idle.
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Old 12-12-2017, 12:01 PM   #28
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I'm not sure if they need to take of the head or not to replace the lifters from the way he made it sound I don't think so, I also saw some videos on YouTube of someone using a magnet to retrieve them but idk if it's the same w/ this type of engine. I think he just meant he used the camera to inspect the valves in the cylinder. And yeah once I get it back I plan on doing some of my own kind of diagnostics just for peace of mind if something is out of the ordinary I'll just send it out to a machine shop to replace the entire valve train. Like I said before it ran pretty well other than the misfire that I didn't notice right away, it started up right away and still had that power. The misfire code didn't occur until after I got home. I also drove it to the mechanic and it felt for the most part normal like I said just little bit extra vibration and a rattley idle.
Unless there is some magic involved for the new LT1, I cannot imagine some way to remove and replace a lifter without removing the head. The lifter rides on the cam and the pushrod sits on the lifter which is much larger in diameter than the push rod. The Push rod goes through the head in a very small opening (smaller than the lifter) to operate the Rocker arm and in turn open the valve per the cam lobe.

I am not aware of a way to pull a lifter out through the head on an OHV motor but maybe I'm wrong.
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