"New" engine, many questions. January 08, 2011, 08:32:57 PM I picked up a 302 for $300 yesterday. After some investigation, I am not sure what it is I bought. The intake part number checks out for a 1983 mustang 4 barrel, but the block casting is E5AE C3B. That means the block is a 1985, correct? That would also make it a roller block? The plug wires are set up for the standard firing order, not the high output. Does this mean it is likely not a HO?The guy I bought it from said he pulled it out of a 1983 mustang and it had less than 1000 miles on a rebuild. After taking a look at under one of the valve covers, I would believe it - very clean. There is some rust on the pulleys so I am guessing it had been sitting for awhile. I would just like to get an idea of what exactly I have short of tearing it all apart. Quote Selected
"New" engine, many questions. Reply #1 – January 08, 2011, 08:37:53 PM All factory HO roller engines used 13726548 firing order , BUT it could still be a roller block Quote Selected
"New" engine, many questions. Reply #2 – January 08, 2011, 09:27:56 PM Are there any performance cams on the market that would change the firing order to something other than the HO order? It just seems odd to install a non ho engine into a car that came with one. I suppose it is possible that they just swapped over the intake and headers onto a standard output long block. Or the plug wires could be connected incorrectly. I suppose I won't know until I get it installed and running :( Either way, it will be an improvement over the 255 that is in the car presently. Quote Selected
"New" engine, many questions. Reply #3 – January 08, 2011, 09:36:19 PM Sorry < I should have been more specific all 5.0 HO *roller* cam engines were 13726548 82-84 non HO used 15426378 Quote Selected
"New" engine, many questions. Reply #4 – January 08, 2011, 09:44:35 PM Okay, that makes a little more sense. With the exception of the block casting. An 83 block would have a casting number of E3xx, right? Quote Selected
"New" engine, many questions. Reply #5 – January 08, 2011, 09:47:43 PM E3 or earlier generally , but it could be like a Jasper or Grooms rebuild or similar Quote Selected
"New" engine, many questions. Reply #6 – January 08, 2011, 11:53:18 PM Quote from: hypostang;348913E3 or earlier generally , but it could be like a Jasper or Grooms rebuild or similar Forgive my ignorance, but are those remanufacturers? Just give them a core and you get a rebuilt engine? Quote Selected
"New" engine, many questions. Reply #7 – January 09, 2011, 01:36:09 AM pull the valve cover and look for a stamping on the head. Find out what head its got on it. Most performance cams and HOs use the 1-3-7-2 firing order. Something's not kosher about that engine though. Its got a serpentine pulley on the crank, but a v-belt water pump. 83s would have been all v-belt I think. It has early brackets on it though. Have you heard it run? Quote Selected
"New" engine, many questions. Reply #8 – January 09, 2011, 03:57:24 AM It has the same pulley setup as my 255 in the 82 tbird. I pulled the valve cover, but never looked for a stamp. Is there a specific place I need to look on the head for an identifying stamp? Quote Selected
"New" engine, many questions. Reply #9 – January 09, 2011, 12:05:30 PM I don't remember exactly where. I think its stamped on the outside edge, between cyls 6/7 or 7/8 (1/2 or 2/3 on the pass side). Should be similar to the block casting number (4 letters/digits starting with C,D or E.). As far as knowing what cam you got in there, the only thing you could do is measure the lift at the pushrod end of the rocker. You would need a dial gauge and a magnetic base to do that. Quote Selected
"New" engine, many questions. Reply #10 – January 09, 2011, 12:22:39 PM Quote from: amooset;348930Forgive my ignorance, but are those remanufacturers? Just give them a core and you get a rebuilt engine? Exactly , you give them a core and you get a fresh rebuild . Quote Selected
"New" engine, many questions. Reply #11 – January 09, 2011, 02:06:50 PM I removed the valve cover and didn't find a ford part number. Attached are the two stamps I did find. Not sure if this helps any. Quote Selected
"New" engine, many questions. Reply #12 – January 09, 2011, 02:19:49 PM The top one is the foundry mark the bottom is a date code Quote Selected
"New" engine, many questions. Reply #13 – January 09, 2011, 02:49:41 PM I beleave the casting # is under the intake ports. Use a mirror to check. Quote Selected
"New" engine, many questions. Reply #14 – January 10, 2011, 12:34:18 AM roller engine has 6.27'' long pushrodsnon-roller has 6.9'' long pushrodscasting is found on the bottom of the head found exposed in the lifter valley.simply looking under the valve cover, you may find XXX arched in the middle and perhaps the casting number.look along the exhaust manifold area where the shorter non water jacket bolts are and see if your casting number is arched around one of the head bolts either to the rear or the front. the heads go on either side of the engine so one side will allow you to see some information that is hidden by the other.look for 4 digitslike mine C6xx heads.scroll through my diy link for a bunch of casting number information. Quote Selected
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