need help figuring out engine size
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New User
Joined: Jun 2009
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need help figuring out engine size
I dont know what motor i pulled today. casting number says d4te and the spark plugs face each other, two plugs face back of engine and then two back plugs face front of engine. its a eight cylinder engine, came out of a one ton dually truck, think it was a 73.help please I want to know the engine size so I can get parts.
Posting Guru
Joined: Mar 2009
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From: Alston, MI
well, the engine's a 74, and i'm gonna guess 360 or 390, b/c them are the only 2 engines that i have never taken close looks at, and i dont recall seeing an engine where the plugs face eachother... but it's a guess, dont expect me to be right... that's all i can think of!
Junior User
Joined: May 2009
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the only ways i know of to tell the difference is either by decoding a number cast into the block(not sure where it is) or measuring the stroke of the crank. i agree it would be nice to know which one u have but is really only needed if u have to replace the rods or the crank. everything else is the exact same. they took a 360 and changed the stroke of the crank and length of the piston rods to change cubic displacement.
Senior User
Joined: May 2009
Posts: 152
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From: Fayetteville, AR
The blocks are exactly the same. You can pull a spark plug and measure the stroke and it will tell you exactly what you have. Someone here gave me the easiest way to do this. Pull the #1 and #4 spark plugs, take a dowel rod and stick it in the #1 plug hole and rotate the crank pulley until #1 is at top dead center. When #1 is at TDC, #4 will be at the bottom of the stroke. Make a mark on the dowel rod in each cylinder and the difference is your stroke.
a 360 has a 3.50" stroke
a 390 has a 3.78" stroke
a 360 has a 3.50" stroke
a 390 has a 3.78" stroke
Senior User
Joined: May 2009
Posts: 105
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From: Staten Island
The "D4TE" is a casting # the "D" is the decade of the casting mold in this case the 70's("C" would be the 60's)the 4 is the year of the casting mold 1974 "T" is for truck and the "E" is the suffix I believe which is the amount of times the casting was changed/upgraded.In your case most likely you have a 360 cid engine but a common upgrade was tthe 390.The only difference is the stroke,both have a 4.05" bore,a 360 has a 3.50" stroke and a 390 has a 3.784" stroke.There is no outside visible difference between both of these plants.Both of these engines come from the "FE" family of engines.I would try a shot in the dark and look at the VIN #the engine code is the 4th digit.The 360 2v low compression=5,360 2v=y,390 2v=H,390 4v=m
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Senior User
Joined: May 2009
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From: Skyway, WA
If the motor is out, look at the rear crank flange and/or pull the oil pan and get a casting number off the crank. The 390 has a square-ish notch on the rear flange, the 360 (or 352) has a bigger half circle cutout. As far as parts, aside from the rotating assembly, it shouldn't matter as the block is identical. Dropping a dowel into a cylinder is the quickest way to tell unlesss you can inspect to crank.
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