Coolant in Oil - What Now?

[Justinj360]

Mine was a direct swap. I went from a 4.8 to 6.0. I did get a stall. Everything is a direct swap, as long as you get a compatible year. I went with an 05 from a Silverado HD.

What do you mean by you got a stall?
I've heard the 6.0's are gas guzzlers, did you find that to be true?

 

[mattt]

I tried there but they kept trying to give me a compression tester and they seemed confused. Or am I confused and that’ll work?

The O'Reilly part numbers you need are 67085 & 67086. Those are right from my receipt as I recently rented the same tool w/ adapter.

 

[Tonyrodz]

What do you mean by you got a stall?
I've heard the 6.0's are gas guzzlers, did you find that to be true?

I have other work done--cam, longer pushrods, springs, hv oil pump, long tubes, 3000 stall convertor, exhaust and tune. And yes, it's a gas guzzler. But that's with my mods. I don't see how it would be alot different then your 5.3 if you keep the same driving habits. Check out my build thread. If you're on a phone turn it sideways and look at the bottom of my post.

 

[swathdiver]

What do you mean by you got a stall?
I've heard the 6.0's are gas guzzlers, did you find that to be true?

Stall means a torque converter with a higher stall speed, the rpms at which it flashes to before the vehicle begins to move. The stock stall speed is about 1600 rpms. If you are at idle and stab the gas, the motor will flash to this rpms and then continue to climb.

If you build a 6.0 with the 5.3 heads, you'll have more torque and that should help with efficiency.

 

[Tonyrodz]

Stall means a torque converter with a higher stall speed, the rpms at which it flashes to before the vehicle begins to move. The stock stall speed is about 1600 rpms. If you are at idle and stab the gas, the motor will flash to this rpms and then continue to climb.

If you build a 6.0 with the 5.3 heads, you'll have more torque and that should help with efficiency.

Which heads are 5.3 specific James?

 

[mattt]

In the past, I owned an 01 2500HD CC LB 4wd truck with a 6.0. Yes, I would say a 6.0 is a thirsty engine. I suppose it will react differently in a much lighter weight Tahoe, but others I know with 6.0's have said the same thing....they like to slurp the fuel. YMMV......

 

[swathdiver]

Which heads are 5.3 specific James?

For Gen III, that would be the 862s and 706s.

 

[Tonyrodz]

For Gen III, that would be the 862s and 706s.

I had 862's on my 4.8.

 

[swathdiver]

I had 862's on my 4.8.

Yeah, they used them too. The 035 and 317s were used on the 6.0s which you probably have now. They are the grand-daddy of the Gen IV 823s used on the 6.0 and 6.2 motors.

I've read that folks using the 6.0 or 6.6 strokers with 243 heads make gobs of torque at the expense of high end rpms and horsepower which for me, is fine for a truck and my way of thinking anyway. The power band of the old SBC and the Turbocharged Buicks still guides my thinking.

 

[Tonyrodz]

Yeah, they used them too. The 035 and 317s were used on the 6.0s which you probably have now. They are the grand-daddy of the Gen IV 823s used on the 6.0 and 6.2 motors.

I've read that folks using the 6.0 or 6.6 strokers with 243 heads make gobs of torque at the expense of high end rpms and horsepower which for me, is fine for a truck and my way of thinking anyway. The power band of the old SBC and the Turbocharged Buicks still guides my thinking.

Yup, I have the 317's. Some guys need the low end grunt, not many need the top end, although I've had mine up to 127, Buick 145--just sayin