Need Detroit 6v92 info. Another problem.

[Skydiver]

I have made it home with the 6v92. The engine looks unused. The paint is original. The previous owner was a small Fire Dept also. The engine listed on the bid stated only 5000 miles. The pulleys on the front of this engine shows minimal paint wear. I can tell that the v-belts never wore deep into the pulley groves as when a v-belt wears out, belts rides down into the pulley. Was told by the Assitant chief today that when this 96 mod. Sutphen firetruck truck rolled in 2000 the 21 y/o driver was trapped in side but nut hurt bad. When they freed him with the jaws he ran from the scene and was never seen again.



My newest problem: Our 1985 Seagrave pumper has a Silver 92 that ran hot. I just won a bid on this 6v92 but one problem. The engine I took delivery on today is a 1996 model and is the electronic type.



Now my question is, Would it be better to try and convert this electronic fuel injected 6v92 into our non-electronic 1985 Seagrave pumper while keeping everything electronic. I have the engine computer. Or should we take a much simpler route of installing conventional fuel injectors in this 96 model and scavenge the rack from the bad engine. I don't understand how the injector fires in an electronic 6v92. I can see where it has wires going into the valve cover.



Any Detroit mechanics?



Please, only experienced replies. Our VFD has very limited funds.

 

[dieselshu]

You have PM

 

[DPellegrin]

Skydiver= I have to ask what's wrong with the engine that is in the FD truck? All you have said is that it overheated. I have a lot of experience with both the 71 and 92 series DDC 2 stroke diesel engine. The 92's both 8V and 6V have an "8" ring that seals coolant between the block and the head. This "8 " ring is noted for failing during an engine over heat and filling the crankcase with coolant. The cylinder liner seals may not be damaged, although that is certainly possible. Unless the engine is seized it may be salvagable. I have replaced several "8" rings without liner seal damage and then ran that engine another 100K miles.



To answer you original question, I would "convert" that electronic engine to mechanical govenor. With all the necessary wiring, electronic foot pedal and sensor connections to the existing radiator you are in for a lot of work. How did you plan to match up that electronic engine to your existing fire pump controls? That's going to be a real problem for you!



343 Don't Ever Forget



Regards,

 

[Skydiver]

DPellegrin, Thanks for the reply.

The temp was at 275 when it started loosing power. Looked back and appeared that the engine doghouse was on fire. Much smoke and steam pouring out. We were on a fire call. When the driver let up on the pedal it died. I did notice a small stream of water coming from the exhaust as well.

3 days later I hit the starter button and it cranked with only 5 rev's. Only ran it for 8 seconds. Still had oil on the dip stick with no milky water. It was skipping real bad. Now when water is added I was told it pours out 2 different tubes on the engine

What is required to install on our old Seagrave so it will comply with the needs of this DDCE computer?



Also I did a search for Detroit Forums. Can only find marine and Motor home forums. Any mechanics forums on large diesels?

 

[DPellegrin]

I wish I could help you more but you have a major undertaking if you are going to try and put the DDEC (it would be DDEC II or III if it's a 1996) engine in the older Seagrave. My only advice would be see if you can talk to some tech people at Seagrave (they are in Wisconsin) and get their opinion. I'm almost certain they will discourage you from doing this. But then again they might be willing to sell you all the wiring harnesses and other components to do the job. You are definitely going to have to speak with them about making that engine talk to your fire pump controls. My sense is that you will find in that discussion you will be in for some big $ for those components!



The 6V-92T has some inspection covers on the side of the block where you can actually see the piston rings and piston condition. See if you can get them off and take a look. Don't get discouraged! You may be able to salvage the current engine.



If you like send me a private message with your Phone # and I would be glad to call and speak with you in greater detail about your 6V92 problem.



Best Regards,

 

[Skydiver]

We want to keep it electronic but the costs will be enormous,

We will have to convert the DDEC back to mechanical.