Need Help in Identification
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Joined: Dec 2002
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From: Halifax, NS
Need Help in Identification
Ok.. I finally got my truck into the shop that I service write for, to get it ready to put on the road for the summer. The previous owner was only able to tell me that it had "a 351M/400", but didnt actually know what displacement it had..
I was assuming it was a 400 for awhile, but now that it's time to tune this sucker and do routine maintainance, I find myself unsure.
I ripped off the the starter tonight, and the only casting number I was able to see was "D7TE 2 A 3" (certain about the first part, but the order of the last three might be reversed.. left the paper i had it written down on in the shop)
All that i can glisten from that is that it's a 77 Truck engine.
Is there a definite way I can identify this engine? Neither the dome tag or emissions decal on the valve cover are there anymore. I hear that the harmonic balancers were different between the two.. can anyone shed some light on this?
I was assuming it was a 400 for awhile, but now that it's time to tune this sucker and do routine maintainance, I find myself unsure.
I ripped off the the starter tonight, and the only casting number I was able to see was "D7TE 2 A 3" (certain about the first part, but the order of the last three might be reversed.. left the paper i had it written down on in the shop)
All that i can glisten from that is that it's a 77 Truck engine.
Is there a definite way I can identify this engine? Neither the dome tag or emissions decal on the valve cover are there anymore. I hear that the harmonic balancers were different between the two.. can anyone shed some light on this?
Last edited by Craigwell; Apr 24, 2003 at 09:54 PM.
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Joined: Jun 2002
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Need Help in Identification
The casting number is the same for either 351M or 400. Check the fifth digit in your VIN number. H=351, S=400. We haven't confirmed the difference between balancers yet, but a fair guess is the 351M is less than 1" thick and the 400 is over 1" thick.
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More Turbo
Joined: Dec 2002
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From: Halifax, NS
Need Help in Identification
The Engine is not original in my truck. It rolled off the line with a 360. The second owner swapped the modified in... i am the fourth owner..
I'll check the dampener thickness, and also try to track down the second owner..
thanks for your insight!
J
I'll check the dampener thickness, and also try to track down the second owner..
thanks for your insight!
J
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Need Help in Identification
If you really must know, you could pull the oil pan off and look for a 1K stamped on the crank. As far as I know, that's the only code for all the 351M cranks.
Try this 1st.
Use the timing marks for reference and turn the crank to TDC by hand, remove the #1 spark plug. Get a stiff wire like a piece from a coat hanger. Put it straight down until it touches the piston. Mark the wire length next to a reference point like the valve cover.
A 2nd person could make the part easier. Turn the crank slowly and let the wire follow the piston to the bottom of the stroke. When the wire stops moving down, stop turning the crank. Mark the wire against the same reference point you used before. Measure the distance between the marks and that is your stroke. The measurement may not be exact, but it should be easy to tell if the stroke is 3.5 or 4".
If you're by yourself, put a mark at the bottom of a pulley, turn the crank until the mark reaches the top, as close as you can get to 180 deg. Put the wire through the hole again, mark and measure the same way as before.
Clear as Mud?
Casting codes
http://uk.geocities.com/infieldg/ima...gNbrsBlock.jpg
http://uk.geocities.com/infieldg/ima...ngNbrsHead.jpg
Try this 1st.
Use the timing marks for reference and turn the crank to TDC by hand, remove the #1 spark plug. Get a stiff wire like a piece from a coat hanger. Put it straight down until it touches the piston. Mark the wire length next to a reference point like the valve cover.
A 2nd person could make the part easier. Turn the crank slowly and let the wire follow the piston to the bottom of the stroke. When the wire stops moving down, stop turning the crank. Mark the wire against the same reference point you used before. Measure the distance between the marks and that is your stroke. The measurement may not be exact, but it should be easy to tell if the stroke is 3.5 or 4".
If you're by yourself, put a mark at the bottom of a pulley, turn the crank until the mark reaches the top, as close as you can get to 180 deg. Put the wire through the hole again, mark and measure the same way as before.
Clear as Mud?
Casting codes
http://uk.geocities.com/infieldg/ima...gNbrsBlock.jpg
http://uk.geocities.com/infieldg/ima...ngNbrsHead.jpg
Thread Starter
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More Turbo
Joined: Dec 2002
Posts: 705
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From: Halifax, NS
Need Help in Identification
Actually, that was quite clear! I appreciate your input; I'm sure that would work just fine.
Not sure what your links were for, but they did not work for me.. ??
J
Not sure what your links were for, but they did not work for me.. ??
J
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Joined: Jun 2002
Posts: 1,099
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Need Help in Identification
They were a couple pages from the rebuild manual listing casting #s for heads, blocks, and cranks.
Maybe the direct link doen't work.
Try this page for an indirect link
http://www.geocities.com/infieldg/v8main.html
Maybe the direct link doen't work.
Try this page for an indirect link
http://www.geocities.com/infieldg/v8main.html
Thread Starter
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More Turbo
Joined: Dec 2002
Posts: 705
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From: Halifax, NS
Need Help in Identification
Thank You, for that, It was rather interesting..
Under scrutiny, it's evident for me that the head casting numbers wont help me either, unless I happen to have a 400 built before 1975... that doesnt seem to be the case.
The block number would have to be D5AZ or earlier...
strange combinations find away to occur however, I tracked down the number of the second owner of the truck however, and I shall find out all soon.
J
Under scrutiny, it's evident for me that the head casting numbers wont help me either, unless I happen to have a 400 built before 1975... that doesnt seem to be the case.
The block number would have to be D5AZ or earlier...
strange combinations find away to occur however, I tracked down the number of the second owner of the truck however, and I shall find out all soon.
J
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