Thermostat housing and cooling tubes installed.
Other end of cooling tubes.
Detroit Diesel 671TI Rebuild
Moderators: BeaconMarineBob, Moderator, BeaconMarineDon
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Jerry
- Moderate User
- Posts: 309
- Joined: Fri Dec 05, 2008 11:30 am
- Location: Presque Isle Bay, Erie, Pa.
Setting the injector heights.
I purchased a dial indicator off of ebay that was made by Snap On tools to set injector heights on Detroit Diesels. They quit making it years ago and I found this one new in the box.
I paid way too much but I did not want to use the old style tool as I wanted them to be exact. I will sleep better now.
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Jerry
- Moderate User
- Posts: 309
- Joined: Fri Dec 05, 2008 11:30 am
- Location: Presque Isle Bay, Erie, Pa.
In total, Dave and I had about 300 hours into doing everything that we did.
That includes all of the work at the boat and also at Daves shop taking things apart, prepping and painting. Also the time that went into making the few special tools that we needed and also the welding that went into making the lifting frame.
All in all, this rebuild came in at just over $10,000 dollars.
That included all parts, machine work, supplies, and paying Dave although he did not ask for or intend to take any money for the work he did.
There was no way I could have made it through this without my Father's help, Daves help and also John from the machine shops help.
I also had help from some very good friends in getting the head out and back in to the boat.
I am very glad that I undertook this project as I now have a much better understanding of what makes this engine tick.
I had to laugh as Dave received a phone call at his shop from someone that asked if he knew anything about Detroit Diesels.... His reply was No, I'm sorry I don't.
That includes all of the work at the boat and also at Daves shop taking things apart, prepping and painting. Also the time that went into making the few special tools that we needed and also the welding that went into making the lifting frame.
All in all, this rebuild came in at just over $10,000 dollars.
That included all parts, machine work, supplies, and paying Dave although he did not ask for or intend to take any money for the work he did.
There was no way I could have made it through this without my Father's help, Daves help and also John from the machine shops help.
I also had help from some very good friends in getting the head out and back in to the boat.
I am very glad that I undertook this project as I now have a much better understanding of what makes this engine tick.
I had to laugh as Dave received a phone call at his shop from someone that asked if he knew anything about Detroit Diesels.... His reply was No, I'm sorry I don't.
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Stripermann2
- Ultimate User
- Posts: 3027
- Joined: Fri Jan 19, 2007 9:11 am
- Location: Solomon's Island, MD
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jefflaw35
WOW, did I say WOW!!!????? 
gonna go paint some little 318 parts now 
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summer storm
- Moderate User
- Posts: 737
- Joined: Tue Nov 17, 2009 10:52 pm
- Location: Ft Lauderdale Fl
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Jerry
- Moderate User
- Posts: 309
- Joined: Fri Dec 05, 2008 11:30 am
- Location: Presque Isle Bay, Erie, Pa.
I had someone email me a good question so I thought I would post the answer here.
Along we using assembly lube to put everything together we did pre-oil the engine before we attempted to start it.
Dave had an old unit that was used years ago from the hot rod days. It looks like a cross between a garden sprayer and a fire extinguisher.
It is a metal cylinder that the top unscrews so you can put a few gallons of oil in, then screw the cap back on. There is a pressure gauge and an air fitting on top so you can pressureize it with an air source.
There is a hose coming off of the bottom of the cylinder that we plumbed into the the engine via the oil pressure sending unit mounting hole.
Once it was hooked up we just slowly opened the valve on the tank and the oil was then forced into the engine.
We left the valve cover loose so we could lift it off and look to see if the oil was making its rounds and it worked just fine.
The secound part of the question was how did we get all of the air out of the fuel system in the block?
Anybody that has ever breached the fuel system of a detroit knows that it is not an easy task to get all of the air out.
The engines do have fuel system primers on them but because the system was about dry it was useless.
The fuel goes in to the side of the head then into passage ways that are internal heading to the little tubes that we hooked to the injectors. The fuel that is not used by the injector is then returned via another tube to passage ways in the head then exits the head and goes into a fuel cooler then back the the fuel tank.
The injector is supplied much more fuel then the engine actually needs as it is a source of cooling for the injector.
We disconnected the fuel line from the output of the fuel cooler then hooked it up to the suction side of a pump.... turned the pump on and watched as the primary fuel filter started to fill up. It worked pretty slick as it seemed to suck all of the air out of the system and suck the fuel in.
Once we had all fuel coming out of the pump we just disconnected it and hooked the return line back up.
Along we using assembly lube to put everything together we did pre-oil the engine before we attempted to start it.
Dave had an old unit that was used years ago from the hot rod days. It looks like a cross between a garden sprayer and a fire extinguisher.
It is a metal cylinder that the top unscrews so you can put a few gallons of oil in, then screw the cap back on. There is a pressure gauge and an air fitting on top so you can pressureize it with an air source.
There is a hose coming off of the bottom of the cylinder that we plumbed into the the engine via the oil pressure sending unit mounting hole.
Once it was hooked up we just slowly opened the valve on the tank and the oil was then forced into the engine.
We left the valve cover loose so we could lift it off and look to see if the oil was making its rounds and it worked just fine.
The secound part of the question was how did we get all of the air out of the fuel system in the block?
Anybody that has ever breached the fuel system of a detroit knows that it is not an easy task to get all of the air out.
The engines do have fuel system primers on them but because the system was about dry it was useless.
The fuel goes in to the side of the head then into passage ways that are internal heading to the little tubes that we hooked to the injectors. The fuel that is not used by the injector is then returned via another tube to passage ways in the head then exits the head and goes into a fuel cooler then back the the fuel tank.
The injector is supplied much more fuel then the engine actually needs as it is a source of cooling for the injector.
We disconnected the fuel line from the output of the fuel cooler then hooked it up to the suction side of a pump.... turned the pump on and watched as the primary fuel filter started to fill up. It worked pretty slick as it seemed to suck all of the air out of the system and suck the fuel in.
Once we had all fuel coming out of the pump we just disconnected it and hooked the return line back up.