From behind the IP gear cover:
6.9D U2 U5(?) 25407_ (I think the _ is a 1, but half is covered by the valley pan seal). On the emission sticker, may/june is punched out. Is that even the right place to get the block number?

thanks

 

Here is a list originally posted by Pete, PLC7.3 that gives the best run down I ever saw.

And looking at the list, you block is fine.


6.9 blocks up to serial #u2u17900 had a thinner casting around the block heater. It is very common for these blocks to crack.


6.9L Old Style Block

Block Casting Number:


On left side of block (beneath oil cooler) 1805440C1
Note: Some 440 blocks are truly new style and must be visually inspected by raised donut around the block heater, frost plug (right rear). Old style below serial number 173828.
Visual Identification: *No counter bored area for block heater
*No defined area on side of block for dip stick
*Thickness of cast iron around block heater 3/8" (.375")
Head Bolts: *7/16, 12 point socket is used to torque head bolts
*Block tapped with 7/16-14 for head bolts

6.9L New Style Block

Block Casting Number: 1807996C1 Note: Some new style blocks have casting
number 440. Above serial number 173828.
Visual Identification: *Has counterbored area for block heater
*Very defined relief area cast in side of block for dip stick tube.
*Thickness of cast iron around block heater 15/32" (.470")
*Latest style (not all new style 6.9) has ribs around head bolts, rear two on left side go from head gasket surface to pan rail - same as 7.3
Head Bolts: *Same as old style 6.9

 

Good, cause its sure nice to have that sucker plugged in in the cold weather...even though were not even close to that yet (40s and 50s all week).....this winter blows, WHERE'S ALL THE SNOW!!!

 

We got it in the Pacific NW.
We almost never get this much snow at these low elevations and never this early.
It was COLD too.

 

72 degrees here today.

 

Have you done any plowing at all this year.

 

That's weird!

 

So thats where all the heat is coming from. I was wondering why it started raining today when it was snowing for the last 2 weeks.

It's soup even on the ski hills.

Glad you've got a good block, farmboy..

 

i still have to check mine but i live in cali never gets below 60 degress all year round

 

One plow session this year so far back toward the first of December.

I looked at the thermometer when I got up at 5AM, it was 65 degrees.
That is about 50 degrees above what it should be this time of year.

 

You're getting ALL of the global warming and not giving any to the rest of us. Selfish, just selfish.

 

u like sweeting all year move to cali of florida

 

Just talked to a friend in fairbanks 38 below last night and supposed to get colder and stay for 7 to 10 days them people dont want to talk about global warming.

 

Just joined (and posted a welcome post!) and I have a question about this topic. 1807996C1 is mentioned as a good block; however, my number is "1805011C2". Is this the new style block or not? I could assume C2 followed the C1 series, but I would rather know for sure. Any help would be greatly appreciated.

 

More importantly, check the block s/n stamped next to the IP gear cover on the driver side. Refer to the chart on post #52 in the tech thread...

https://www.ford-trucks.com/forums/1...ch-info-4.html