Should be a screamer when it's done.
CK5
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One Piece at a Time: My 1985 Diesel Suburban
- Thread starter AgDieseler
- Start date
I've been watching on IG. I love your attention to detail, I have so little patience for engine work. I just want to drop it in and turn the key.
I just now got this. Ha! I was only a child of the 80s.
I’m similar. This is an every other decade venture for me, so it’s fun to indulge. It’s a whole other side of the brain from fab work.
David
I love this. Never expected to see someone hot-rodding a 6.x these days, but I'm confident you'll do a good job.
I love this. Never expected to see someone hot-rodding a 6.x these days, but I'm confident you'll do a good job.
All this hot-rodding kinda makes me wanna crank the boost on mine, to see what all it can do.
But my block is already cracked, so I'm pretty sure how that will end...
3 questions.
Are you just connecting the rear coolant "crossover" ports together? Or will they be connecting to something else?
Are you pulling CDR off the top of the valve-cover? (I found this to get in the way of my turbocharger, but yours is mounted quite a bit lower than mine).
What is the extra port mounted in the middle of the Vee? You have it hosed over to the valvetrain, so I assume it's an oil port. It's just not one that I've used before.
Are you just connecting the rear coolant "crossover" ports together? Or will they be connecting to something else?
Are you pulling CDR off the top of the valve-cover? (I found this to get in the way of my turbocharger, but yours is mounted quite a bit lower than mine).
What is the extra port mounted in the middle of the Vee? You have it hosed over to the valvetrain, so I assume it's an oil port. It's just not one that I've used before.
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It will end with the beginning of an epic 6.X build? CoolAll this hot-rodding kinda makes me wanna crank the boost on mine, to see what all it can do.
But my block is already cracked, so I'm pretty sure how that will end...
I still don't get it and keep looking for a razor blade...
My pockets are a lot shallower than David's, so I'm just going to live vicariously through his build.
I calculate that I could have bought 42 of my long blocks for the price of his...and still had enough money left over to buy a nice lunch.
Good chit ain't cheap and cheap chit ain't good.
They’ll connect together and route to the upper radiator return.
Yep. No changes there.
Just an oil tap for the turbo.
It’s there. I’m only missing the mirror. And the powder.
I figure I’ll only get to build this engine the one time. It’s a joy to be able to share the experience with my dad, and to fund the endeavor like he did 20 years ago with the 6.2.
David
Your IG followers would have been disappointed had you done anything less unique
Now I’m intrigued. I’ve never thought much about the rear coolant crossover ports. On my 6.5, they are blocked off. It’s that the way it should be? Should they crossover? Or route to the radiator return like you’re doing?
Andy
In regards to the rear coolant ports, I would leave them covered with the traditional block off plates.
Pulling coolant from that point in the system will create hotspots in the head.
The new fancy water pump should more than adequately system. Coupled with the upgrade turbo you have which is free-flowing on the exhaust side. Will help keep the engine heat under control.
Pulling coolant from that point in the system will create hotspots in the head.
The new fancy water pump should more than adequately system. Coupled with the upgrade turbo you have which is free-flowing on the exhaust side. Will help keep the engine heat under control.
It’s normal for them to be blocked off. There was no factory crossover at the rear.
I’m duplicating part of the steam tube design from LS engines to allow any trapped vapor in those hot back cylinders to escape and purge and hopefully not get trapped In the head. It’s all 4AN stuff. It’s an experiment to further improve the cooling system function.
Yeah, I’ve always been confused when folks setup a -8 or other large hose back there. There’s plenty of flow with a good pump, and a line that size isn’t additive to the systems ability to move water. That’s why I chose the 3/16” ID lines - large enough to purge trapped vapor but small enough so it doesn’t become a second upper radiator return.
David
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This to me would be worth all the monies. Enjoy!
About coolant crossover, I like what you've done. Here's a company that offers a kit, haven't seen them share data though.
It definitely sounds good in theory. I can't say that I've seen any long term reports good bad or otherwise from folks that have tried.
So I'm curious as to how it'll play out and if it'll actually help.
Very high value.
I spent some time talking it through with the hummer dudes at rubber duck 4x4, and they’ve tinkered with it quite a bit and have some anecdotal experiences to share. I’ll make my best effort, and see if it’s snake oil or something else.
David
All that monster torque!
