Engine/Transmission (1994 - 1998) Dissecting an 800,000 mile engine

[GAmes]

If you look on the front face of the block does it have TUPY or JI CASE cast in to it?

I see no markings at all. The gear case is still installed, are they under the case?

 

[ewcmr2]

The IH symbol was under the gear case on my block.

 

[RJAnderson]

The reason I asked about the casting was because I worked on the machining line years ago. I could look down the line at the coming blocks. The Tupy blocks were as bright as a nickle and the JI Case were as dark as coal. I know the metallurgy had to be different. I wonder if the bright blocks had more nickle which I know decreases were rates.

 

[GAmes]

Resurrecting this old thread. I just installed this engine today. Bored . 020, only had to polish the crank journals. I wish I had taken more pistons out before I sent it to a rebuilder. I just noticed a couple days ago that the #1 port of the exhaust manifold is covered in an oily, tar like substance. Anyway, $3600 poorer, but now have a fresh new engine to work with. There is going to be a dyno day just after Mothers Day near Conroe, TX. The rings should be seated by then, especially if my dispatcher gets busy:-laf

 

[BLNRAY]

oil rings can wear out,lose tension without breaking or leaving scars on the cylinder walls. valve guides can also contribute to oil consumption.

 

[GAmes]

If someone would check my math please. I think I now have 377ci, 6. 2 liter Cummins. Stock is 102. 1 mm (4. 02 in) bore and 119. 9 mm (4. 72 in) stroke. Bored . 020 in.

 

[ewcmr2]

No calculator here at the breakfast table... But the back of the napkin in my head math says a . 020 over bore isn't going to give an 18 cubic inch displacement increase.

 

[AH64ID]

I come up with 366 cu/in, or 5. 95L, where stock is 359 cu/in or 5. 89L.

 

[hsmith]

So, is it together and running now Gary??

 

[GAmes]

Thanks for the math check guys. It didn't look right to me either.



It is running, and a lesson learned. Coolant leaks are in direct proportion to the number of clamps you do not tighten down:-laf I took it for a short drive today, then got involved in fixing an outside faucet. Tomorrow I'm going for a longer drive. So far, so good!!

 

[GAmes]

I come up with... ..... 5. 95L, where stock is... ... 5. 89L.

OMG!!! Do I have to round up and have a 6. 0??

 

[AH64ID]

No, I don't think you do

 

[RVPILOT]

retiring motor

Finally decided to retire my million plus 21 thousand mile motor still ran good when I took it to the shop for an exchange. the only thing replaced was gaskets due to leaks at 500 thousand. bought a backup motor several years ago waiting for signs of failure. i believe I will have it torn down to see what wear there is. I have gut feeling that the replacement wont last as long. neither will I as Im approching my 80th birthday. Keep on truckin. Stormy

 

[NIsaacs]

Dang, RV don't you ever stay home?:-laf That some good miles. I think your sig shows 12,100,000 tho (1,2100,000) Maybe it should look like this 1,021,000??



Nick

 

[RVPILOT]

mikage

Your right , math was not my favorite subject. stormy

 

[HBarlow]

I'm impressed! Have you been working as an RV transporter to roll up all those miles?

 

[Vaughn MacKenzie]

GAmes was there enough cylinder wear that it made reboring necessary versus just a hone job?

 

[Mikey-KE7LBB]

Finally decided to retire my million plus 21 thousand mile motor still ran good when I took it to the shop for an exchange. the only thing replaced was gaskets due to leaks at 500 thousand. bought a backup motor several years ago waiting for signs of failure. i believe I will have it torn down to see what wear there is. I have gut feeling that the replacement wont last as long. neither will I as Im approching my 80th birthday. Keep on truckin. Stormy

I think that both Cummins and Dodge would love to buy your truck for a show piece. AND to give the Duramax and Powerstroke crowd a black eye

 

[GAmes]

GAmes was there enough cylinder wear that it made reboring necessary versus just a hone job?

Boring was required. The bottom of the holes was larger than the tops. Remember, . 020 over is only . 010 off the sides. That isn't much. I have no complaints.



On my way to AZ, PA, OH then AB. One heck of a test drive. The OH to AB trailer is a 36' toyhauler

 

[mwilson]

I think that both Cummins and Dodge would love to buy your truck for a show piece. AND to give the Duramax and Powerstroke crowd a black eye

Seriously, you should contact Cummins about that right now.



They might be interested and if those miles are documented even better... ... .



Mike.