2004 6.0 NV4500 Tahoe

[pwtr02ss]

No idea how to do that tbh.

Me either lol.

 

[Rocket Man]

Yeah pretty sure you need to follow the instructions exactly including the parking brake and have it in park. I remember now that I did do it once when I swapped my PCM on my 02 and I tried it without setting the parking brake because I figured since it didn’t work there was no point. It didn’t perform the relearn until I did that. I have since swapped my original PCM back in and I don’t think I ever did the relearn with this one. I’ll do it today just to be sure it’s done.

 

[pwtr02ss]

No idea how to do that tbh.

Wait, I forgot you'll be doing this in the scanner. In the vehicle functions you can command gears (remember you doing this on the 4l60?). I'm not sure if it has the option for "park" or not, but thats where I'd look.

 

[Dantheman1540]

Yeah pretty sure you need to follow the instructions exactly including the parking brake and have it in park. I remember now that I did do it once when I swapped my PCM on my 02 and I tried it without setting the parking brake because I figured since it didn’t work there was no point. It didn’t perform the relearn until I did that. I have since swapped my original PCM back in and I don’t think I ever did the relearn with this one. I’ll do it today just to be sure it’s done.

That's what I was afraid of.

Wait, I forgot you'll be doing this in the scanner. In the vehicle functions you can command gears (remember you doing this on the 4l60?). I'm not sure if it has the option for "park" or not, but thats where I'd look.

Yes I believe I can command it but IDK if the ECU needs a signal return to confirm its in park or not.

 

[pwtr02ss]

That's what I was afraid of.


Yes I believe I can command it but IDK if the ECU needs a signal return to confirm its in park or not.

Ah, possible but maybe not. Give it a shot. If you have to have the signal, you can probably find which pin triggers that on the pcm and maybe ground that wire?

 

[Dantheman1540]

Ah, possible but maybe not. Give it a shot. If you have to have the signal, you can probably find which pin triggers that on the pcm and maybe ground that wire?

I was thinking that, I need to reinspect my trans temp sensor wire anyway I think it's becoming intermittent. A lot of this stuff will have to wait till after the head swap because it's getting tore down Saturday for sure.

 

[pwtr02ss]

I was thinking that, I need to reinspect my trans temp sensor wire anyway I think it's becoming intermittent. A lot of this stuff will have to wait till after the head swap because it's getting tore down Saturday for sure.

Get r done!

 

[Dantheman1540]

Get r done!

I'm super excited to drop the oil pan and see what's up, I'd be tickled to death if I saw ARP bolts or studs anywhere in the bottom end, or even better something forged lol.

 

[pwtr02ss]

I'm super excited to drop the oil pan and see what's up, I'd be tickled to death if I saw ARP bolts or studs anywhere in the bottom end, or even better something forged lol.

Hey, just be happy if its super clean and you see no bearing material. The rest will be a bonus! lol

Are you doing the o-ring? That why you're taking the pan off? Good thing its 2wd, those are cake!

 

[Dantheman1540]

Hey, just be happy if its super clean and you see no bearing material. The rest will be a bonus! lol

Are you doing the o-ring? That why you're taking the pan off? Good thing its 2wd, those are cake!

Yep O-ring is the main reason, not because I think it's bad but because I don't know its history, and if it's 17years old I'd rather replace it now than when a rod loses oil and a piston smacks the new heads. I'm also just really really curious how the bottom end and oil pan look.

 

[pwtr02ss]

Yep O-ring is the main reason, not because I think it's bad but because I don't know its history, and if it's 17years old I'd rather replace it now than when a rod loses oil and a piston smacks the new heads. I'm also just really really curious how the bottom end and oil pan look.

I'm sure its fine

It'll be good to clean it up if not. Cheap insurance

 

[iamdub]

Dropped it to 6,500 and did a semi-slow neutral rev up till I felt the limiter kick on, then I let the RPM naturally fall and cycled the ignition which it told me to. I never got any indication that it completed the process or whatever but I guess I will log later and see if anything changed.

**Edit** Did a little more research and it clearly didn't work, it's supposed to set a 4k fuel cut when it's in test mode. Gonna try a couple more things such as holding the brake while doing it and not clicking the "OK" box. Seems people have all sorts of funky issues trying this.

I should've posted the link I was reading when I saw that HPT can do it. But, yeah, IIRC, you set the parking brake, hold the brake pedal, start the engine while continuing to hold the brake, rev to fuel cutoff (it'll automatically be at ~4,000 RPM) over a 4-second period, let it return to idle, shut off engine and don't do anything for at least 15 seconds.

 

[Dantheman1540]

Ported the oil pump outlet and checked to see what spring this $63 M295 has. The blue spring should make 60psi which is more then enough for a basic LQ4 I think. I cleaned, loctited, and torqued everything back down so it’s ready to go when I get started in the Tahoe later.

 

[Rocket Man]

Ported the oil pump outlet and checked to see what spring this $63 M295 has. The blue spring should make 60psi which is more then enough for a basic LQ4 I think. I cleaned, loctited, and torqued everything back down so it’s ready to go when I get started in the Tahoe later.

What's the porting do?

 

[Dantheman1540]

What's the porting do?

Looks cool duh

Idk I stumbled upon an LS1 tech thread about it and figured I might as well, the outlet had some really sharp edges so it can’t hurt. WS6Store sells ported ones for $100 more so I just saved some money I guess.

 

[iamdub]

What's the porting do?

Probably not much in the grand scheme. But, it's still (a relatively thick) fluid being squeezed through orifices and around corners. So, why not help it move more freely? I was after volume with mine so this would surely increase that.

Looks cool duh

Idk I stumbled upon an LS1 tech thread about it and figured I might as well, the outlet had some really sharp edges so it can’t hurt. WS6Store sells ported ones for $100 more so I just saved some money I guess.

I used an M295HV. I ported the intake side as well because of that large step in the way.

Outlet:

Later improved areas:

 

[Rocket Man]

Probably not much in the grand scheme. But, it's still (a relatively thick) fluid being squeezed through orifices and around corners. So, why not help it move more freely? I was after volume with mine so this would surely increase that.




I used an M295HV. I ported the intake side as well because of that large step in the way.

View attachment 362460

View attachment 362461


Outlet:

View attachment 362462


Later improved areas:

View attachment 362463

I’m afraid if I started with that, I’d find myself thinking about every other corner and bend the oil goes through in the block and drive myself crazy so idk if I’ll do it if I ever get around to building an engine.

 

[iamdub]

I’m afraid if I started with that, I’d find myself thinking about every other corner and bend the oil goes through in the block and drive myself crazy so idk if I’ll do it if I ever get around to building an engine.

This reminded me of my mis-aligned oil galley: https://www.tahoeyukonforum.com/threads/growing-up-doesnt-have-to-suck.93510/post-1428047

 

[Rocket Man]

This reminded me of my mis-aligned oil galley: https://www.tahoeyukonforum.com/threads/growing-up-doesnt-have-to-suck.93510/post-1428047

See? You wouldn’t know if you didn’t look!

 

[iamdub]

See? You wouldn’t know if you didn’t look!

Right!

This prompted me to reflect upon my adult life and remind myself of all the holes I ever regretted looking in to.