Need engine info
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Senior User
Joined: Sep 2007
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From: Roberta, GA
Need engine info
I bought a used 7.3l engine this morning. Upon getting it home i realize that it has the alternator and a/c compressor reverse of whats in my 00' f350. no big deal plan on rebuilding it. I tried to turn it over and it stops each time at a certain spot, now the glow plugs are removed so its not compression related. I also removed the oil pan all looks well in there. Thoughts an why it stops at this certain spot? It did fall on its side while hauling it home. It does have "ad" code injectors, the prior owner claimed it was from a truck but I believe its from a van due to the non intercooler plenum, thermostat housing extension, and the plug where the oil fill is on our trucks. I would also like to verify this has forged rods how would i know?
Hotshot
Joined: Jan 2002
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From: La La Land
Wish I could have said "suspect hydro-locking", but the only reason I can think of why it stops at a certain point if it's not compression-related is a dropped valve.
That wouldn't be good.........
Hope it was cheap, 'cause you never know what a cylinder wall is gonna' look like in such cases.
Pop
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From: Texas
You've got an OBS block it sounds like. Not sure why you have AD's in there. Does it have a mechanical fuel pump, or the hole for it on top of the motor?
Not sure about the the stop point while turning. Any of the rockers not moving right when you turn the motor over?
Not sure about the the stop point while turning. Any of the rockers not moving right when you turn the motor over?
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From: Roberta, GA
It does not have a mechanical fuel pump or a hole for one on the top, at least I did not see a hole while I was pressure washing the grease off. For what its worth the valve covers say 01.
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From: Roberta, GA
This morning the engine would still not turn past that spot. The glow plugs had been out for quite some time, after pulling the heads there appears to be a lot of carbon buildup on top of the piston. All the valves are intact and appears okay, but gonna have the heads rebuilt as well. After taking the heads off the engine rotates great, all piston coming up flush to the deck. What the thoughts on head studs? I have been told you need new bolts anyway.
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This morning the engine would still not turn past that spot. The glow plugs had been out for quite some time, after pulling the heads there appears to be a lot of carbon buildup on top of the piston. All the valves are intact and appears okay, but gonna have the heads rebuilt as well. After taking the heads off the engine rotates great, all piston coming up flush to the deck. What the thoughts on head studs? I have been told you need new bolts anyway.
yes while the engine is out, put studs in
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its obvious its a van engine. it probably has pmr's too. nothing wrong with pmr's. How many people do you know that blew up their engines solely because of they had pmr's. At least you got a good turbo this time. There is a freeze plug in the valley about the size of your thumb, thats where a mechanical fuel pump would have went. I have two van engines now 
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