Thatoneguy
Full Access Member
Does it really open up a whole lot more coolant flow? Why did they plug them from the factory?
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Project: The New CDD Shop Truck
- Thread starter Thewespaul
- Start date
Sent from my Moto Z (2) using Tapatalk
It’s pictured in my last post, it uses the 6637 filter
Wow Wes! Moving fast and looking good
Thanks man! Lookin forward to getting this thing buttoned up and on the street.
That’s correct, when international went to the 7.3 from the 6.9 they plugged multiple coolant passages to keep more heat around the cylinders in an attempt to get a more complete burn of the fuel in colder climates. Pretty much just an early emissions change they did. Makes a significant difference in cooling, I’ve got a customer I built an engine for that he put in a bronco and he doesn’t even run an engine fan. These plugs were why the 7.3s had cooling issues and the 6.9s dont
icanfixall
Official GMM hand model
Reason for plugging the 7.3 blocks was thought to be for heat. This heat was to improve the emissions coming out of the engines. EPA standards changed and this was a way to clean up a dirty engine. Then problem was too much heat so our 7.3 ran hotter. Sometimes way more than we wanted.
Getting all the porting done today, air compressor motor seized so I’m stuck rotating cordless drills and batteries trying to keep them cool. Slow going this way but it’s progress. Once I have the compressor going I’ll go in with the flapper disc and finish it up, but this is about how much material I take out of the exhaust. You can see all the ridges and bumps in the casting that just collect soot and carbon that I removed to smooth out the ports.
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ColLonewolf
Registered User
Need to have you build me a motor.
I’d be happy to once I get this engine, project jerry’s engine and two other customer engines done. Shoot me a pm with what you want done power wise and we can go from there
ColLonewolf
Registered User
Funny thing about that is I do not have one to rebuild. Body rotted off my Centurion so I bought an Excursion. Love the X but only has a V8 so towing sucks. Miss my old IDI w/Hypermax and have had wild thoughts of putting one in my X. I do not wish to trouble myself with the electronics of a PSD and I know that a 12V Cummins would be more efficient. Just some wild thoughts and dreams. Looks like you do good work.
Thanks man, since this engine is going in my own truck it’s getting the quick and dirty service before going in the truck, normally I would have the block decked and mag the heads but I don’t think this engine will be staying in long, I’ve got bigger plans for this truck once the junkyard engine expires.
I’ve got about half a dozen engines that are rebuildable so that’s not an issue but it would be cheaper to start with a running engine that doesn’t need full machining, which I can source locally no problem. That ex has the 2v 5.4l right? It would not be difficult to build an idi to surpass that 330-360 ft lbs of torque those are rated at and if you are active or retired military like your username suggests I do a heavy discount for those who have served our country.
I’ll shoot you a pm and we can work out some numbers so you can think it over
I’ve got about half a dozen engines that are rebuildable so that’s not an issue but it would be cheaper to start with a running engine that doesn’t need full machining, which I can source locally no problem. That ex has the 2v 5.4l right? It would not be difficult to build an idi to surpass that 330-360 ft lbs of torque those are rated at and if you are active or retired military like your username suggests I do a heavy discount for those who have served our country.
I’ll shoot you a pm and we can work out some numbers so you can think it over
ColLonewolf
Registered User
Retired. Thanks.
Its not allowing me to message you because of your limited forum posts since the site update, if you send me a message we should be able to go from there, sorry for the inconvenience
Comp 910-16 valve springs came in so I pulled the stock springs and valves out of the head, this is what was left of the valve seals for all 16 valves
Valves were pretty dirty, but not bad at all. No cracking and each one cleaned up easy
Finished up the porting, here’s a before and after with a backlight through the port. Never again doing this with a cordless drill.
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Valves were pretty dirty, but not bad at all. No cracking and each one cleaned up easy
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Finished up the porting, here’s a before and after with a backlight through the port. Never again doing this with a cordless drill.
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Valves are lapped
I always use the 6.9 style valve seals, they allow more oil in than the 7.3 seals which were known to cause valve guide issues.
Comp 910s installed
And this head is assembled, now to do all the same to the other head, my second head gasket came in today so I’m hoping to have both heads done and torqued on the engine today.
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I always use the 6.9 style valve seals, they allow more oil in than the 7.3 seals which were known to cause valve guide issues.
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Comp 910s installed
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And this head is assembled, now to do all the same to the other head, my second head gasket came in today so I’m hoping to have both heads done and torqued on the engine today.
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I was gonna ask why you don't have a die grinder but then I remembered your compressor died...
Do those Comp 910s need a new/different retainer or do/can they reuse the old ones?
Do those Comp 910s need a new/different retainer or do/can they reuse the old ones?
Yeah compressor is dead so I haven’t been able to use my die grinders at all. The 910s retain all the factory components, just cleaned everything up and inspected it before it went back in
2 am update, second head is ported, cleaned up, valves lapped, 910s and seals installed. Pulled the gaskets out and installed both the heads. Studs got a final torque of 150 ft lbs.
Pulled the lifters and retainers out to install the new to me Johnson hylifts courtesy of @Hydro-idi, thanks again man!
Valvetrain installed, reused the all the stock 200k mile rockers and pushrods.
New valley pan installed and modified for the oil drain, painted up the intake and temporarily installed it with the resealed oil cooler. Dropped some spare valve covers on and it’ll be ready for cleaning and painting in the morning.
Drivers side exhaust manifold cleaned up and coated. Drilled and tapped two ports so I can run a drive pressure gauge along with my egt gauge.
Pulled the lifters and retainers out to install the new to me Johnson hylifts courtesy of @Hydro-idi, thanks again man!
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Valvetrain installed, reused the all the stock 200k mile rockers and pushrods.
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New valley pan installed and modified for the oil drain, painted up the intake and temporarily installed it with the resealed oil cooler. Dropped some spare valve covers on and it’ll be ready for cleaning and painting in the morning.
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Drivers side exhaust manifold cleaned up and coated. Drilled and tapped two ports so I can run a drive pressure gauge along with my egt gauge.
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