My engine block shows C6DE-6015-A. It's in my brother's '66 Bronco, which I restored over the past year, but I didn't do anything inside the engine. So I haven't looked around inside (I haven't dropped the oil pan to see how many bearings). I assumed it was a 170ci because it has three frost plugs on the passenger side. But check this out from fordsix.com/ci/Ident-2 page:
Here's how to figure out what size the block is. Identification can be made with a quick glance at three items on the motor, the water pump, number of freeze plugs, and the block code (found on the road draft tube mounting boss). The only trick is determining the difference between a 170ci 4 main and a 200ci 4 main, if there is no block code, as both engines had a three bolt water pump and three freeze plugs. The only way I know of for sure, is to verify the bore size. If I learn of another method, I'll let you know.
250ci -7 main: 4 bolt water pump and 5 freeze plugs.
200ci -7 main: 3 bolt water pump and 5 freeze plugs.
[highlight=yellow]200ci -4 main: 3 bolt water pump and 3 freeze plugs.[/highlight]
170ci -4 main: 3 bolt water pump, 3 freeze plugs, and a "T" code (or no code).
144ci -4 main: 3 bolt water pump, 3 freeze plugs, and an "N" code.
Could I have a 200ci? I could because I think my brother burned up the engine in Nevada back in the 90s (I can't ask him now - he's got dementia). Then he burned up the head a couple of times too. Has everything been replaced? The head reads C5DE 6090-A... whatever at this point. The whole thing coulda been swapped out, mixed and matched.
Questions:
1. do any 200ci's really have three freeze plugs (like FordSix suggests)?
2. do any 200ci's really have four main bearings?
3. any other ways to determine the CI of the engine - before I have to tear it apart (without having to measure bore size)?
I am not a I6 guru like y'all. But I'd like to look into a 2V Conversion with a later head and get some more power out of this little engine.
'66 uncut Bronco. 170ci stock (I assume). DUI HEI dist (5/16" drive), new ARG. Holley 1904 1V carb.
Here's how to figure out what size the block is. Identification can be made with a quick glance at three items on the motor, the water pump, number of freeze plugs, and the block code (found on the road draft tube mounting boss). The only trick is determining the difference between a 170ci 4 main and a 200ci 4 main, if there is no block code, as both engines had a three bolt water pump and three freeze plugs. The only way I know of for sure, is to verify the bore size. If I learn of another method, I'll let you know.
250ci -7 main: 4 bolt water pump and 5 freeze plugs.
200ci -7 main: 3 bolt water pump and 5 freeze plugs.
[highlight=yellow]200ci -4 main: 3 bolt water pump and 3 freeze plugs.[/highlight]
170ci -4 main: 3 bolt water pump, 3 freeze plugs, and a "T" code (or no code).
144ci -4 main: 3 bolt water pump, 3 freeze plugs, and an "N" code.
Could I have a 200ci? I could because I think my brother burned up the engine in Nevada back in the 90s (I can't ask him now - he's got dementia). Then he burned up the head a couple of times too. Has everything been replaced? The head reads C5DE 6090-A... whatever at this point. The whole thing coulda been swapped out, mixed and matched.
Questions:
1. do any 200ci's really have three freeze plugs (like FordSix suggests)?
2. do any 200ci's really have four main bearings?
3. any other ways to determine the CI of the engine - before I have to tear it apart (without having to measure bore size)?
I am not a I6 guru like y'all. But I'd like to look into a 2V Conversion with a later head and get some more power out of this little engine.
'66 uncut Bronco. 170ci stock (I assume). DUI HEI dist (5/16" drive), new ARG. Holley 1904 1V carb.