Well then it makes total sense. I’m willing to bet that’s it. A good visual will let you know if you have broken exhaust manifold bolts to start with.
Tonyrodz's Tahoe Build Thread
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Tonyrodz
Resident Resident
Here's a vid of the noise.
Here's what the header bolts look like also.
Opinions on the vid?
Opinions on the vid?
Could be an exhaust leak, like I said they sound almost identical. Use something as a stethoscope like I said. If it’s in the valve train it will be super noticeable from one side to the other. Compare by listening to both sides and compare. If the ds isn’t making way more noise that the ps then it’s an exhaust leak. Any of those bolts could be broken and you don’t know it until you try to loosen or tighten them. When you did the other side, did you break any when changing the gasket? Those look like they’re not in good shape. You should use ARP or stainless ones when you re-do the gasket.
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Tonyrodz
Resident Resident
I should've done both sides at the same time--even if it was just the bolts. I didn't notice how bad those header bolts were until today. When I did the ps, the bolts were still in good shape, so none broke. I did replace those with grade 8's iirc. Those bolts are still in good shape.
iamdub
Full Access Member
Maaaaaaaan... I'm hoping it's just a leaking gasket but, through my laptop speakers, it's really sounding like valvetrain noise to me.
My best description of the two sounds is an exhaust tick is a steady "tick-tick-tick-tick-tick-tick" and slack in the valvetrain is a "CLACK-clack-CLACK-clack-CLACK-clack-CLACK-clack-CLACK" at twice the frequency. I'm hearing the "CLACK-clack...".
You must really be busy cuz that would've eaten me alive until I at least ruled out something. If I worked late, I'd be under the hood with a flashlight trying to diagnose it in the dark.
My best description of the two sounds is an exhaust tick is a steady "tick-tick-tick-tick-tick-tick" and slack in the valvetrain is a "CLACK-clack-CLACK-clack-CLACK-clack-CLACK-clack-CLACK" at twice the frequency. I'm hearing the "CLACK-clack...".
You must really be busy cuz that would've eaten me alive until I at least ruled out something. If I worked late, I'd be under the hood with a flashlight trying to diagnose it in the dark.
wjburken
Supporting Member
If I was a betting man, I would put money on a lifter failure. It sounds eerily similar to what my 6.2L sounded like in my '07. Hope I'm wrong.
I still say it could be an exhaust leak. Listen when he first starts it up and his phone is up near the engine. Tick-tick-tick-tick-tick....like I said, I was sure mine was lifter tick too but it wasn't. But yeah, I sure would be figuring it out instead of letting it worry me for days. Come on Tony!
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Tonyrodz
Resident Resident
I honestly don't have time to do ANYTHING. I wake up at 4:30 am, out of the house at 6:20, and not home til 5 pm--or later. Shit, shower, shave then bed. Repeat again. Idk what it is with this job, but it really is taking its toll. Days off are usually working my business or taking my gf somewhere. I got a hold of my friend today to see if he has time to look at it for me. So hopefully he'll come through, til then it's just sitting. Weird how it's been running good, and then this. Nothing leading up to it. I already know--just a guess, and with my luck--it's the worst case scenario.
Sam Harris
Supporting Member
Best case! Best case! I understand the stress this puts you under Tony. After I took the Yuk home from the exhaust shop, I was a wreck all weekend until I started her back up, and saw the plug wire moving. Then I just prayed all day, that it was just loose plugs.. and it was.. with some additional tweaking needed.
Snowbound
Jim
Sorry to hear about your luck and being a slave to your daily routine. I know all about this too well. To me, sounds just like a lifter issue. I’ve been there and done that. Sucks but just thinking about it is the worst part. Disassembly and repair is easy enough.
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