Tonyrodz
Resident Resident
Thx Sam. I actually should've gotten on it much more lol. That was with 22 's on it.
2004 6.0 NV4500 Tahoe
- Thread starter Dantheman1540
- Start date
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Dantheman1540
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Dang that sounded good! What happened to that motor?
I'm about to go pull spark plugs on mine now.
Tonyrodz
Resident Resident
Oil pressure sensor was broken. It was pegged at 80 psi forever. Along with the cam, I had a HV Melling oil pump installed. Drove it almost every day for 2 yrs, 1 day it made a noise. Sounded like a lifter noise. Motor wasn't getting oil pumped to the top end.
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Dantheman1540
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Man that cam sounds good! Sounds much bigger than 218/224. If I ever end up pulling the heads on my Tahoe 6.0 it will end up with a bigger cam for sure! Hopefully what's in it will last until I can afford something with 400+cubes.
Not gonna keep updating race truck progress because obviously it's not a tahoeYukon. But I did borescope the cylinders and they look pretty good I think it's a head gasket failure. Will pull heads Monday.
Tonyrodz
Resident Resident
You should post up the race truck status for sure. When it comes down to it--we're all gear heads and we all have a love of wrenching--some more then others.
X2!
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Dantheman1540
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Alright alright I'll break forum rules.
Borescope down the spark plug holes and the cylinders and pistons look pretty good. Kinda impossible to see small cracks but overall they look good. My thoughts now are somehow the LS9 head gaskets have failed. New gasket will be here Wednesday the plan is to pull heads tomorrow evening and hopefully just throw the new gaskets in Wednesday night. Then let her rip tater chip.
Actually go easy on it and get a good 200 miles or so on it without anymore boost to make sure all is going well. Then hammer the thing with boost pulls and get the tune dialed to perfection.
Borescope down the spark plug holes and the cylinders and pistons look pretty good. Kinda impossible to see small cracks but overall they look good. My thoughts now are somehow the LS9 head gaskets have failed. New gasket will be here Wednesday the plan is to pull heads tomorrow evening and hopefully just throw the new gaskets in Wednesday night. Then let her rip tater chip.
Actually go easy on it and get a good 200 miles or so on it without anymore boost to make sure all is going well. Then hammer the thing with boost pulls and get the tune dialed to perfection.
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Dantheman1540
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Drained oil and cut open filter it looks good to me. No chunks, minimal sparkle and no coolant or fuel mixed in.
Tonyrodz
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Hopefully no damage has been done. Gonna replace the head bolts? Or did you say you have studs instead? Not gonna clean(mill) the heads up at all?
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Dantheman1540
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It's got ARP2000 studs. I'd really like to not have to touch the heads as they were brand new PRC 220cc CNC ported head assembled by TSP and have less than 200 miles on them. The engine has never gotten hot dont think I've even seen 200* water temps with the Mishimoto radiator 160* thermostat and brand new water pump. However if I suspect any reason to get them surfaced or repaired I will for sure!
Plus I don't really want to mill them any Its already just a smidge over 10-1 compression.
Tonyrodz
Resident Resident
Ahh, I hear ya. If you didn't get hot I think you should be fine.
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Dantheman1540
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That's my hope. With any luck there will be a very obvious problem in the head gasket.
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Dantheman1540
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Got the motor torn down in a couple hours this evening. Didn't get driver head off yet since I suspected the passenger side to be the problem. Thankfully pistons and valves look good and I see an obvious failure point in the head gasket . Not sure why it blew though. My torque wrench is snapon and was recently calibrated. Only thing I can really think of is that I torqued. The heads twice and ended up pulling them again and retorqueing using the same gasket which might be a nono I'm not sure. Also they might have gotten wd40 on them when I was coating the cylinders. Not sure if that would cause an issue.
New gaskets will be here Wednesday and I'll pull the driver side head tomorrow
New gaskets will be here Wednesday and I'll pull the driver side head tomorrow
Tonyrodz
Resident Resident
Looks pretty clean. Did you pull the motor?
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Dantheman1540
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Nope yanked the blower, fuel rails, coolant lines, fuel lines, catch can stuff and headers. Not bad at all. When I put this motor in I specifically designed all the lines to be easy to get to and everything is AN fittings! No silly worm gear clamps or spring clamps. Also used arp bolts for nearly everything which is nice.
Onebad1983
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Tony you already have to spend money on the 'Hoe. Don't get any ideas
Onebad1983
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Start a thread for teh race trokAlright alright I'll break forum rules.
Borescope down the spark plug holes and the cylinders and pistons look pretty good. Kinda impossible to see small cracks but overall they look good. My thoughts now are somehow the LS9 head gaskets have failed. New gasket will be here Wednesday the plan is to pull heads tomorrow evening and hopefully just throw the new gaskets in Wednesday night. Then let her rip tater chip.
Actually go easy on it and get a good 200 miles or so on it without anymore boost to make sure all is going well. Then hammer the thing with boost pulls and get the tune dialed to perfection.
View attachment 242955 View attachment 242956 View attachment 242957
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Dantheman1540
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Oh goodness I haven't been laid off yet I still have work to do lol. I'll work on it but its gonna take a lot of work I've had it for 5 or 6 years now and there's only a few things left that are original. Like the interior and the pealing paint. The entire drive train and suspension is completely different.
Onebad1983
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please man that'd be awesome
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Dantheman1540
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I will but not this week got to much going on. I basically leave house around 0630 and get to walk back into the house around 2300.
I do have further good news the driver side looks healthy! No sign of Corona virus.
With any luck it will be running by the end of the week!
In other news I've been really loading the hoe down with building supplies as I've been expanding one of my barns. It's so nice to throw bags of concrete and boxes if Simpson strong ties in the back and not worry about them getting wet or anything. Got this cool pic when I visited my neighbors lumber yard to get supplies last week. Love this truck I think its the best DD I've ever had.
